CN118496543B - Reservoir bottom film with plastic deformation and strength performance and preparation process thereof - Google Patents
Reservoir bottom film with plastic deformation and strength performance and preparation process thereof Download PDFInfo
- Publication number
- CN118496543B CN118496543B CN202410962949.3A CN202410962949A CN118496543B CN 118496543 B CN118496543 B CN 118496543B CN 202410962949 A CN202410962949 A CN 202410962949A CN 118496543 B CN118496543 B CN 118496543B
- Authority
- CN
- China
- Prior art keywords
- density polyethylene
- bottom film
- carbon black
- polyethylene resin
- reservoir bottom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
- C23C14/30—Vacuum evaporation by wave energy or particle radiation by electron bombardment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
- C08K2003/3063—Magnesium sulfate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Toxicology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides a reservoir bottom film with plastic deformation and strength performance and a preparation process thereof, and relates to the technical field of geomembranes. The preparation process comprises the following steps: according to mass percentage, 60-70% of raw material high-density polyethylene resin, 10-30% of ethylene-vinyl acetate copolymer, 10-20% of thermoplastic elastomer, 2-5% of carbon black and 5-10% of stabilizer are melted, mixed and molded at 160-250 ℃ to obtain the reservoir bottom film with both plastic deformation and strength properties. The prepared reservoir bottom film has good mechanical property and seepage-proofing property.
Description
Technical Field
The invention relates to the technical field of geomembranes, in particular to a reservoir bottom membrane with plastic deformation and strength performance and a preparation process thereof.
Background
The hydraulic junction engineering is used as a special structure, so that seepage not only wastes water sources, but also can influence the stability of the dam. The geomembrane is used as a novel synthetic polymer material, has good toughness, deformation resistance and extensibility, can help the dykes and dams bear certain compressive stress, and plays a role in improving the stability of the dykes and dams.
The geomembrane is a waterproof barrier material with high molecular polymer as basic raw material. The method is mainly divided into a Low Density Polyethylene (LDPE) geomembrane, a High Density Polyethylene (HDPE) geomembrane and an EVA geomembrane. Geomembranes having a thickness of 0.8mm or greater may also be referred to as "flashing".
Disclosure of Invention
The inventors found that: the existing reservoir bottom film is easy to break through, stress concentration exists at the joint of the reservoir bottom film, and joint breakage is easy to occur. Resulting in reduced performance and even failure of the overall barrier system. The inventor conducts many researches, and starts from raw materials, adopts high-density polyethylene resin, ethylene-vinyl acetate copolymer and thermoplastic elastomer, adds additives such as carbon black, stabilizer and the like, and provides a base film capable of guaranteeing seepage prevention performance and simultaneously considering plastic deformation, tear resistance performance and strength performance through compounding of a series of raw materials. The study shows that the single LDPE reservoir bottom film has poor mechanical property, and the reservoir bottom film has poor drop impact resistance when applied to the position where the water flow height of the dam exceeds 100m, the application compounds the high-density polyethylene resin, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer, and by adding a proper amount of ethylene-vinyl acetate copolymer, not only can promote the cross-linked thermoplastic elastomer to be well dispersed in the resin phase and promote the interpenetration among macromolecules, but also can strengthen the two-phase interface, so that the two-phase interface effect is obviously enhanced, and the finally prepared reservoir bottom film has good mechanical properties.
The invention provides a preparation process of a reservoir bottom film with plastic deformation and strength performance, which comprises the following steps: according to mass percentage, 60-70% of raw material high-density polyethylene resin, 10-30% of ethylene-vinyl acetate copolymer, 10-20% of thermoplastic elastomer, 2-5% of carbon black and 5-10% of stabilizer are melted, mixed and molded at 160-250 ℃ to obtain the reservoir bottom film with both plastic deformation and strength properties.
Optionally, the mass ratio of the high-density polyethylene resin, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer is (6-7): (1-2):1.
Optionally, the reservoir bottom film comprises a resin layer and a titanium alloy plasma layer deposited on the inner surface and the outer surface of the resin layer, wherein the resin layer is prepared from the raw materials;
The preparation method of the titanium alloy plasma layer comprises the following steps: (1) Placing the resin layer into a vacuum chamber, introducing helium gas, increasing the air pressure of the vacuum chamber to 8 multiplied by 10 -2-1×10-1 Pa, ionizing the helium gas under the action of a magnetic field and microwaves, and cleaning the resin layer by adopting generated helium plasma;
(2) Then introducing 2% -8% of titanium nano alloy into the vacuum chamber, and generating titanium alloy plasma under the activation of helium plasma; (3) The resin layer is adjusted to be positively biased, and titanium alloy plasmas are deposited on the inner surface and the outer surface of the resin layer to generate a titanium alloy plasma layer.
Optionally, the high density polyethylene resin has a density greater than 1.5g/cm 3 and a melt flow mass rate at 190 ℃ at 2.16kg of less than 0.61g/10min.
Optionally, the high-density polyethylene resin is subjected to a modification treatment, wherein the modification treatment comprises the following steps:
and (3) carrying out blending extrusion and granulation on the dried high-density polyethylene resin, silicon carbide, magnesium sulfate and a silane coupling agent to obtain the modified high-density polyethylene resin.
Wherein the mass ratio of the high-density polyethylene resin to the silicon carbide to the magnesium sulfate to the silane coupling agent is (5-8): 1-3): 1.
Optionally, the thermoplastic elastomer is one or more of SBS, SIS, SEBS.
Alternatively, the carbon black is 2% -5%, and the average particle size of the carbon black is less than 30nm.
Optionally, the carbon black is modified, and the modification process comprises the following steps:
And (3) dropwise adding the sodium carbonate solution into the aqueous dispersion of the carbon black, and dehydrating and drying to obtain the modified carbon black with the pH value of 8-10.
Optionally, the stabilizer is one or more of 2, 6-di-tert-butyl-4-methylphenol, antioxidant 1010, antioxidant 1076 and diphenyl diisooctyl phosphite.
The invention further provides a base film with plastic deformation and strength properties, and the base film is prepared by adopting the preparation method.
Compared with the prior art, the invention has at least one of the following beneficial effects:
(1) The prepared reservoir bottom film is prepared by compounding high-density polyethylene resin, ethylene-vinyl acetate copolymer and thermoplastic elastomer, and by adding a proper amount of ethylene-vinyl acetate copolymer, the crosslinked thermoplastic elastomer can be well dispersed in a resin phase, and the intermolecular infiltration of macromolecules is promoted, so that the effect of strengthening a two-phase interface is achieved, the effect of the two-phase interface is obviously enhanced, and the finally prepared reservoir bottom film has good mechanical property.
(2) The metal titanium is added into the bottom film prepared by the method, so that the bottom film has stronger corrosion resistance due to the introduction of the metal titanium, and the bottom film can be suitable for various environments.
(3) According to the invention, the high-density polyethylene resin is modified, and silicon carbide and magnesium sulfate are added into the high-density polyethylene resin, so that the mechanical property and ageing resistance of the high-density polyethylene resin can be improved, and the strength performance of the bottom film of the warehouse can be further improved.
(4) According to the invention, the carbon black is modified, so that the contact and infiltration of the resin and the carbon black are facilitated, the combination between the resin and the carbon black interface is improved, the mechanical property of the carbon black filled resin is improved, and the mechanical property of the reservoir bottom film is further improved.
Detailed Description
In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In an exemplary embodiment of the present invention, a process for preparing a reservoir bottom film that combines both plastic deformation and strength properties includes the steps of: according to mass percentage, 60-70% of raw material high-density polyethylene resin, 10-30% of ethylene-vinyl acetate copolymer, 10-20% of thermoplastic elastomer, 2-5% of carbon black and 5-10% of stabilizer are melted, mixed and molded at 160-250 ℃ to obtain the reservoir bottom film with both plastic deformation and strength properties.
Optionally, the preparation process comprises the following steps:
(1) The method comprises the steps of adding raw materials into a high-speed blending machine in proportion, stirring to obtain a premix, selecting a co-rotating twin-screw extruder to blend and extrude the premix, heating equipment during processing of the twin-screw extruder, wherein each heating area is a partition, different processing temperatures are set for each partition according to different processing technologies, and barrel screw elements corresponding to each partition are different; during processing, the method can be divided into 4-6 areas, each area comprises 2-4 subareas, the processing temperature in the same subarea is uniform and unchanged, and the processing temperatures of the areas are sequentially increased. The material dispersing uniformity is met, and the performance of each material is fully exerted. For example, the processing temperatures of the first to twelve zones of the twin-screw extruder may be: one 160 ℃, two 160 ℃, three 160 ℃, four 160 ℃, five 170 ℃, six 170 ℃, seven 180 ℃, eight 180 ℃, nine 185 ℃, ten 185 ℃, eleven 200 ℃, twelve 200 ℃.
(2) And (3) placing the extruded granules into a three-layer co-extrusion blow molding machine, wherein the screw temperatures of a first region and a fifth region of the blow molding machine are 180 ℃, 185 ℃, 190 ℃, 200 ℃, 250 ℃ respectively, and extruding and molding to obtain the base film.
Optionally, the mass ratio of the high-density polyethylene resin, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer is (6-7): (1-2):1.
Optionally, the high density polyethylene resin has a density greater than 1.5g/cm 3 and a melt flow mass rate at 190 ℃ at 2.16kg of less than 0.61.0g/10min.
Optionally, the high-density polyethylene resin is subjected to a modification treatment, wherein the modification treatment comprises the following steps:
and (3) carrying out blending extrusion and granulation on the dried high-density polyethylene resin, silicon carbide, magnesium sulfate and a silane coupling agent to obtain the modified high-density polyethylene resin.
Wherein the mass ratio of the high-density polyethylene resin to the silicon carbide to the magnesium sulfate to the silane coupling agent is (5-8): 1-3): 1. According to the invention, silicon carbide and magnesium sulfate are added into the high-density polyethylene resin, so that the mechanical property and ageing resistance of the high-density polyethylene resin can be improved, and the strength performance of the bottom film of the warehouse can be further improved. Alternatively, the silane coupling agent may be one of methyltrichlorosilane, aminosilane, vinylsilane, epoxysilane, allyltrimethoxysilane.
Optionally, the thermoplastic elastomer is one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), hydrogenated styrene-butadiene block copolymer (SEBS).
Alternatively, the carbon black is 2% -5%, and the average particle size of the carbon black is less than 30nm. Preferably, the carbon black has an average particle size of less than 20nm. A large amount of carbon black reduces the mechanical properties of the base film, and within this range, carbon black can ensure the mechanical properties of the base film. The carbon black with smaller particle size can effectively block ultraviolet rays and prevent the ultraviolet degradation of the bottom film of the warehouse.
Optionally, the carbon black is modified, and the modification process comprises the following steps:
And (3) dropwise adding the sodium carbonate solution into the aqueous dispersion of the carbon black, and dehydrating and drying to obtain the modified carbon black with the pH value of 8-10. The modified carbon black has a loose structure, is easier to break and disperse in the mixing process of the modified carbon black and the raw materials, is beneficial to contact and infiltration of the resin and the carbon black, improves the combination between the resin and the carbon black interface, improves the mechanical property of the carbon black filled resin, and further improves the mechanical property of the reservoir bottom film.
Optionally, the stabilizer is one or more of 2, 6-di-tert-butyl-4-methylphenol, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant 1010), stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant 1076 for short) and diisooctyl mono-benzene phosphite.
In another exemplary embodiment of the present invention, the base film includes a resin layer and a titanium alloy plasma layer deposited on the inner and outer surfaces of the resin layer, and the resin layer may be the base film prepared as described above.
The preparation method of the titanium alloy plasma layer comprises the following steps: placing the resin layer into a vacuum chamber, introducing helium gas, increasing the air pressure of the vacuum chamber to 8 multiplied by 10 -2-1×10-1 Pa, ionizing the helium gas under the action of a magnetic field and microwaves, and cleaning the resin layer by adopting generated helium plasma;
then introducing 2% -8% of titanium nano alloy into the vacuum chamber, and generating titanium alloy plasma under the activation of helium plasma; the resin layer is adjusted to be positively biased, and titanium alloy plasmas are deposited on the inner surface and the outer surface of the resin layer to generate a titanium alloy plasma layer.
Specifically, the prepared resin layer is firstly sent into a vacuum chamber, helium is introduced into the vacuum chamber and stabilized, a magnetic coil current is turned on to generate a preset magnetic field, and microwaves are turned on to couple the magnetic field with the microwave to generate helium plasma; before coating, helium plasma is adopted to clean the surface of the resin layer, titanium nano alloy is introduced after cleaning, the titanium nano alloy is ionized under the action of the helium plasma to form titanium alloy plasma, then a power supply is connected, the surface of the resin layer is bombarded to form electron irradiation, the titanium alloy plasma is deposited on the surface of the resin layer, and the titanium alloy plasma layer is generated on the inner surface and the outer surface of the resin layer under extremely low air pressure to obtain the reservoir bottom film. The introduction of the metallic titanium enables the bottom film to have stronger corrosion resistance, so that the bottom film can be suitable for various environments. Furthermore, the titanium nano alloy forms chemical combination with the resin layer in the plasma deposition process, so that the combination effect of the titanium alloy plasma layer and the resin system layer used in the ultralow-temperature liquid hydrogen environment is improved, and the interface compatibility is ensured.
Example 1
The preparation process of the reservoir bottom film with both plastic deformation and strength performance comprises the following steps:
(1) According to mass percent, 60% of raw material high-density polyethylene resin, wherein the density of the high-density polyethylene resin is more than 1.5g/cm 3, the melt flow mass rate at 190 ℃ and 2.16kg is less than 0.61g/10min, 10% of ethylene-vinyl acetate copolymer, 10% of thermoplastic elastomer SBS, 2% of carbon black, the average particle diameter of the carbon black is 25nm, and 1010% of antioxidant are added into a high-speed blending machine, the mixture is stirred to obtain premix, the premix is selected to be blended and extruded by a co-rotating twin-screw extruder, and the processing temperatures from one area to twelve areas of the twin-screw extruder can be respectively: one 160 ℃, two 160 ℃, three 160 ℃, four 160 ℃, five 170 ℃, six 170 ℃, seven 180 ℃, eight 180 ℃, nine 185 ℃, ten 185 ℃, eleven 200 ℃, twelve 200 ℃.
(2) And (3) placing the extruded granules into a three-layer co-extrusion blow molding machine, wherein the screw temperatures of a first region and a fifth region of the blow molding machine are 180 ℃, 185 ℃, 190 ℃, 200 ℃, 250 ℃ respectively, and blow molding to obtain a base film.
Example 2
The preparation process of the reservoir bottom film with both plastic deformation and strength performance comprises the following steps:
(1) A high-density polyethylene resin is subjected to a modification treatment, the modification treatment comprising the steps of: and (3) carrying out blending extrusion and granulation on the dried high-density polyethylene resin, silicon carbide, magnesium sulfate and allyl trimethoxy silane serving as a silane coupling agent according to a mass ratio of 5:1:1:1 at a temperature of 160-200 ℃ to obtain the modified high-density polyethylene resin.
The modification treatment of the carbon black comprises the following steps: and (3) dropwise adding the sodium carbonate solution into the aqueous dispersion of the carbon black, and dehydrating and drying to obtain the modified carbon black with the pH value of 8.
(2) The method comprises the steps of adding 65% of raw material modified high-density polyethylene resin, wherein the density of the modified high-density polyethylene resin is larger than 1.5g/cm 3, the melt flow mass rate at 190 ℃ and 2.16kg is smaller than 0.61g/10min, 20% of ethylene-vinyl acetate copolymer, 15% of thermoplastic elastomer SIS, 3% of modified carbon black, the average particle size of the modified carbon black is15 nm, and 7% of 2, 6-di-tert-butyl-4-methylphenol into a high-speed blender, stirring to obtain premix, and carrying out blending extrusion on the premix by using a co-rotating twin-screw extruder, wherein the processing temperatures from one area to twelve areas of the twin-screw extruder can be respectively: one 160 ℃, two 160 ℃, three 160 ℃, four 160 ℃, five 170 ℃, six 170 ℃, seven 180 ℃, eight 180 ℃, nine 185 ℃, ten 185 ℃, eleven 200 ℃, twelve 200 ℃.
(3) And (3) placing the extruded granules into a three-layer co-extrusion blow molding machine, wherein the screw temperatures of a first region and a fifth region of the blow molding machine are 180 ℃, 185 ℃, 190 ℃, 200 ℃, 250 ℃ respectively, and blow molding to obtain a base film.
Example 3
The preparation process of the reservoir bottom film with both plastic deformation and strength performance comprises the following steps:
(1) A high-density polyethylene resin is subjected to a modification treatment, the modification treatment comprising the steps of: and (3) carrying out blending extrusion and granulation on the dried high-density polyethylene resin, silicon carbide, magnesium sulfate and silane coupling agent vinylsilane according to a mass ratio of 6:1:2:1 at a temperature of 160-200 ℃ to obtain the modified high-density polyethylene resin.
The modification treatment of the carbon black comprises the following steps: and (3) dropwise adding the sodium carbonate solution into the aqueous dispersion of the carbon black, and dehydrating and drying to obtain the modified carbon black with the pH value of 9.
(2) The method comprises the steps of (1) adding 70% of raw material modified high-density polyethylene resin, wherein the density of the modified high-density polyethylene resin is larger than 1.5g/cm 3, the melt flow mass rate at 190 ℃ and 2.16kg is smaller than 0.61g/10min, 20% of ethylene-vinyl acetate copolymer, 10% of thermoplastic elastomer SIS, 4% of modified carbon black, 17nm of modified carbon black average particle size and 7% of diisooctyl phosphite into a high-speed blender, stirring to obtain premix, and carrying out blending extrusion on the premix by using a co-rotating twin-screw extruder, wherein the processing temperatures of a region to a region of the twin-screw extruder can be respectively: one 170 ℃, two 170 ℃, three 180 ℃, four 180 ℃, five 185 ℃, six 185 ℃, seven 200 ℃, eight 200 ℃.
(3) And (3) placing the extruded granules into a three-layer co-extrusion blow molding machine, wherein the screw temperatures of a first area and a fourth area of the blow molding machine are 180 ℃, 185 ℃, 190 ℃ and 200 ℃ respectively, and performing blow molding to obtain a base film.
Example 4
The preparation process of the reservoir bottom film with both plastic deformation and strength performance comprises the following steps:
(1) A high-density polyethylene resin is subjected to a modification treatment, the modification treatment comprising the steps of: and (3) carrying out blending extrusion and granulation on the dried high-density polyethylene resin, silicon carbide, magnesium sulfate and silane coupling agent aminosilane according to a mass ratio of 8:3:2:1 at a temperature of 160-200 ℃ to obtain the modified high-density polyethylene resin.
The modification treatment of the carbon black comprises the following steps: and (3) dropwise adding the sodium carbonate solution into the aqueous dispersion of the carbon black, and dehydrating and drying to obtain the modified carbon black with the pH value of 10.
(2) The method comprises the steps of (1) adding 70% of raw material modified high-density polyethylene resin, wherein the density of the modified high-density polyethylene resin is greater than 1.5g/cm 3, the melt flow mass rate at 190 ℃ and 2.16kg is less than 0.61g/10min, ethylene-vinyl acetate copolymer 30%, thermoplastic elastomer SEBS15%, modified carbon black 4%, modified carbon black average particle size 15nm and antioxidant 1076 10% into a high-speed blender, stirring to obtain premix, and carrying out blending extrusion on the premix by using a co-rotating twin-screw extruder, wherein the processing temperatures from one area to eight areas of the twin-screw extruder can be respectively: one 170 ℃, two 170 ℃, three 180 ℃, four 180 ℃, five 185 ℃, six 185 ℃, seven 200 ℃, eight 200 ℃.
(3) And (3) placing the extruded granules into a three-layer co-extrusion blow molding machine, wherein the screw temperatures of a first region and a fourth region of the blow molding machine are 180 ℃, 185 ℃, 190 ℃ and 200 ℃ respectively, and extruding and molding to obtain the base film.
Example 5
The preparation process of the reservoir bottom film with both plastic deformation and strength performance comprises the following steps:
the main difference is that, on the basis of example 2, the reservoir bottom film includes a resin layer and titanium alloy plasma layers deposited on the inner and outer surfaces of the resin layer. The base film prepared in example 2 was used as a resin layer.
Placing the resin layer into a vacuum chamber, introducing 5sccm helium gas, increasing the air pressure of the vacuum chamber to 9X 10 -2 Pa, ionizing the helium gas under the action of a magnetic field and 600W microwaves to generate helium plasma, setting a negative bias of 40V, and cleaning the resin layer by adopting the generated helium plasma.
Then 2% titanium nano alloy is introduced into the vacuum chamber, and titanium alloy plasma is generated under the activation of helium plasma.
And then adjusting the resin layer to be 50V in positive bias, and using the positive bias to realize electron irradiation, and depositing titanium alloy plasmas on the inner surface and the outer surface of the resin layer to generate a titanium alloy plasma layer.
Example 6
The preparation process of the reservoir bottom film with both plastic deformation and strength performance comprises the following steps:
the main difference is that, on the basis of example 2, the reservoir bottom film includes a resin layer and titanium alloy plasma layers deposited on the inner and outer surfaces of the resin layer. The base film prepared in example 2 was used as a resin layer.
Placing the resin layer into a vacuum chamber, introducing 7sccm helium gas, increasing the air pressure of the vacuum chamber to 11×10 -2 Pa, ionizing the helium gas under the action of a magnetic field and 600W microwaves to generate helium plasma, setting a negative bias of 70V, and cleaning the resin layer by adopting the generated helium plasma.
Then 5% titanium nano alloy is introduced into the vacuum chamber, and titanium alloy plasma is generated under the activation of helium plasma.
And then adjusting the resin layer to be 70V in positive bias, and using the positive bias to realize electron irradiation, and depositing titanium alloy plasmas on the inner surface and the outer surface of the resin layer to generate a titanium alloy plasma layer.
Example 7
The main difference is that the carbon black was not modified based on example 2.
Comparative example 1
The main difference is that, on the basis of example 1, no thermoplastic elastomer is added in the reservoir bottom film preparation process.
Comparative example 2
The main difference is that, on the basis of example 1, no ethylene-vinyl acetate copolymer was added in the reservoir bottom film preparation process.
The base films prepared in examples 1 to 7 and comparative examples 1 to 2 were subjected to performance test, the base film thickness was 2mm, and tensile strength and elongation at break were tested according to GB/T17132 and GB/T1040.2 to 2006; corner tear strength was tested according to GB/T17132 and QB/T1130, test speed 200mm/min; puncture resistance strength was tested according to GB/T17632 and GB/T17643-2011 appendix D, test speed 300 mm/min; the barrier properties were tested according to GB/T17132 and GB/T328.10, the test results being shown in Table 1.
Table 1 performance test table
As shown in the reference Table 1, the mechanical properties of the reservoir bottom film prepared by the invention are obviously improved, the elongation at break is not lower than 800%, the tensile strength is not lower than 50kN/m, the right-angle tearing load is not lower than 300N, the puncture resistance strength is not lower than 600N, the 0.3MPa is not lower than 24 hours, no leakage exists, and the reservoir bottom film has good anti-seepage performance.
At normal temperature, the base membranes prepared in examples 1-7 are placed in seawater, 50% benzene, 50% sulfuric acid and 20% sodium hydroxide corrosive solution, the mechanical properties of the base membranes are reduced, but the mechanical property retention rate of the base membranes is above 95%, and the mechanical property retention rate of the base membranes in examples 5-6 is above 98%.
Comparative example 2 compared with example 1, the thermoplastic elastomer could not be completely crosslinked and dispersed in the resin phase without adding the ethylene-vinyl acetate copolymer, and the mechanical properties of the finally prepared base film were lowered.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.
Claims (8)
1. The preparation process of the reservoir bottom film with plastic deformation and strength performance is characterized by comprising the following steps of: according to mass percentage, 60% -70% of raw material high-density polyethylene resin, 10% -30% of ethylene-vinyl acetate copolymer, 10% -20% of thermoplastic elastomer, 2% -5% of carbon black and 5% -10% of stabilizer are melted, mixed and molded at 160 ℃ -250 ℃ to obtain a reservoir bottom film with plastic deformation and strength properties;
the reservoir bottom film comprises a resin layer and a titanium alloy plasma layer deposited on the inner surface and the outer surface of the resin layer;
the preparation method of the titanium alloy plasma layer comprises the following steps: placing the resin layer into a vacuum chamber, introducing helium gas, increasing the air pressure of the vacuum chamber to 8 multiplied by 10 -2-1×10-1 Pa, ionizing the helium gas under the action of a magnetic field and microwaves, and cleaning the resin layer by adopting generated helium plasma;
then introducing 2% -8% of titanium nano alloy into the vacuum chamber, and generating titanium alloy plasma under the activation of helium plasma; adjusting the resin layer to be positive bias, and depositing titanium alloy plasmas on the inner surface and the outer surface of the resin layer to generate a titanium alloy plasma layer;
A high-density polyethylene resin is subjected to a modification treatment, the modification treatment comprising the steps of:
Blending, extruding and granulating the dried high-density polyethylene resin, silicon carbide, magnesium sulfate and a silane coupling agent to obtain modified high-density polyethylene resin;
Wherein the mass ratio of the high-density polyethylene resin to the silicon carbide to the magnesium sulfate to the silane coupling agent is (5-8): 1-3): 1.
2. The process according to claim 1, wherein the mass ratio of the high-density polyethylene resin, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer is (6-7): 1-2): 1.
3. The process of claim 1, wherein the high density polyethylene resin has a density greater than 1.5g/cm 3 and a melt flow mass rate at 190 ℃ of less than 0.61g/10min at 2.16 kg.
4. The process of claim 1, wherein the thermoplastic elastomer is one or more of SBS, SIS, SEBS.
5. The process according to claim 1, wherein the carbon black has an average particle size of less than 30nm and is comprised between 2% and 5%.
6. The preparation process according to claim 5, wherein the carbon black is modified by a modification process comprising the steps of:
And (3) dropwise adding the sodium carbonate solution into the aqueous dispersion of the carbon black, and dehydrating and drying to obtain the modified carbon black with the pH value of 8-10.
7. The preparation process according to claim 1, wherein the stabilizer is one or more of 2, 6-di-tert-butyl-4-methylphenol, antioxidant 1010, antioxidant 1076 and diphenyl diisooctyl phosphite.
8. A reservoir bottom film with both plastic deformation and strength properties, characterized in that the reservoir bottom film is prepared by the preparation method of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410962949.3A CN118496543B (en) | 2024-07-18 | 2024-07-18 | Reservoir bottom film with plastic deformation and strength performance and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410962949.3A CN118496543B (en) | 2024-07-18 | 2024-07-18 | Reservoir bottom film with plastic deformation and strength performance and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118496543A CN118496543A (en) | 2024-08-16 |
| CN118496543B true CN118496543B (en) | 2024-10-15 |
Family
ID=92237095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410962949.3A Active CN118496543B (en) | 2024-07-18 | 2024-07-18 | Reservoir bottom film with plastic deformation and strength performance and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118496543B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118880942A (en) * | 2024-08-27 | 2024-11-01 | 山东建通塑工科技有限公司 | A method for using geomembrane in reservoir bottom anti-seepage and a whole reservoir basin membrane anti-seepage system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075166A (en) * | 2012-12-31 | 2013-05-01 | 北京立高科技股份有限公司 | Compound self-adhesion high polymer waterproof plate and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045043B (en) * | 2017-12-04 | 2021-01-26 | 北京东方雨虹防水技术股份有限公司 | Polymer waterproof board and preparation method thereof |
| KR101857121B1 (en) * | 2018-01-24 | 2018-06-20 | 아하방수텍 주식회사 | Adhesive complex sheet for water-proof and root-proof and manufacturing method thereof |
| CN112029185B (en) * | 2020-09-02 | 2022-10-04 | 中国铁道科学研究院集团有限公司金属及化学研究所 | High-strength and puncture-resistant geomembrane and preparation method and application thereof |
| WO2022262572A1 (en) * | 2021-06-18 | 2022-12-22 | 北京东方雨虹防水技术股份有限公司 | Waterproofing coiled material, preparation method therefor, construction method therefor, and tunnel waterproofing system |
| CN118290845B (en) * | 2024-06-05 | 2024-09-17 | 山东建通塑工科技有限公司 | Water conservancy geomembrane with excellent plastic deformation and strength performance and manufacturing process and application thereof |
-
2024
- 2024-07-18 CN CN202410962949.3A patent/CN118496543B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075166A (en) * | 2012-12-31 | 2013-05-01 | 北京立高科技股份有限公司 | Compound self-adhesion high polymer waterproof plate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118496543A (en) | 2024-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN118496543B (en) | Reservoir bottom film with plastic deformation and strength performance and preparation process thereof | |
| KR930008742B1 (en) | Resin molded body | |
| JP6319287B2 (en) | Resin composition for high dielectric constant material, molded product containing the same, and coloring masterbatch | |
| CN1322774A (en) | Material specially for communication optical cable protecting casing and its prepn | |
| CN107099077B (en) | Method for preparing conductive resin composition | |
| JP2002537432A (en) | Thermoplastic vulcanized rubber and method for producing the same | |
| WO2007059138A1 (en) | Thermoplastic method, composition, and article | |
| CN102030978A (en) | Halogen-free flame retardant polyphenylene oxide polyphenyl ether (PPE) cable material composition and preparation method thereof | |
| CN101805508A (en) | Halogen-free fire-retardant polyphenyl ether composition capable of improving low-temperature toughness and preparation method thereof | |
| EP0425207B1 (en) | Thermoplastic resin composition | |
| CN110078994A (en) | A kind of PE pipeline improves material and preparation method thereof | |
| EP3105288B1 (en) | Blends of thermoplastic elastomers based on styrene (s-tpe) and polyolefins | |
| CN1865323B (en) | Multilayer pellet and method for producing the same | |
| CN105801991A (en) | Halogen-free heat shrinkable casing pipe and preparation method thereof | |
| KR20170112929A (en) | Electro-conductive polymer composite and resin composition having improved impact strength and method for preparing the same | |
| CN117209906A (en) | Reactive high-flexibility thermoplastic polyolefin elastomer and preparation method and application thereof | |
| CN115286864B (en) | Irradiation crosslinking polyolefin heat shrinkage tube material and preparation method and application thereof | |
| CN108148336B (en) | Halogen-free conductive TPE cable material and preparation method thereof | |
| CN112778745B (en) | Modified polyphenylene ether and thermoplastic elastomer, preparation method and application thereof, and composition for preparing thermoplastic elastomer | |
| JP2008112669A (en) | Coated wire and its manufacturing method | |
| JPH06170914A (en) | Manufacture of thermoplastic elastomer composition | |
| KR102209155B1 (en) | Polypropylene Resin Composition with Excellent Platability | |
| JP3196453B2 (en) | Method for producing thermoplastic elastomer composition | |
| CN116023746B (en) | Preparation method of halogenated EPDM/PP rubber-plastic blend material, dynamically vulcanized thermoplastic elastomer and its preparation method and application | |
| CN105061848A (en) | 36V self-limiting temperature increase-associated electric heating electric cable core belt material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |