CN111320789B - Environment-friendly efficient tire repairing agent and preparation method thereof - Google Patents
Environment-friendly efficient tire repairing agent and preparation method thereof Download PDFInfo
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- CN111320789B CN111320789B CN202010255312.2A CN202010255312A CN111320789B CN 111320789 B CN111320789 B CN 111320789B CN 202010255312 A CN202010255312 A CN 202010255312A CN 111320789 B CN111320789 B CN 111320789B
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- 238000002360 preparation method Methods 0.000 title claims 4
- 239000000835 fiber Substances 0.000 claims abstract 10
- 239000002245 particle Substances 0.000 claims abstract 10
- 229920002749 Bacterial cellulose Polymers 0.000 claims abstract 9
- 239000005016 bacterial cellulose Substances 0.000 claims abstract 9
- 241000196324 Embryophyta Species 0.000 claims abstract 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract 6
- 239000008119 colloidal silica Substances 0.000 claims abstract 6
- 229920001971 elastomer Polymers 0.000 claims abstract 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract 5
- 229920006173 natural rubber latex Polymers 0.000 claims abstract 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract 4
- 239000008367 deionised water Substances 0.000 claims abstract 4
- 229910021641 deionized water Inorganic materials 0.000 claims abstract 4
- 238000003756 stirring Methods 0.000 claims 5
- 239000000565 sealant Substances 0.000 claims 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 3
- 238000000855 fermentation Methods 0.000 claims 3
- 230000004151 fermentation Effects 0.000 claims 3
- 239000012452 mother liquor Substances 0.000 claims 3
- PTHCMJGKKRQCBF-UHFFFAOYSA-N Cellulose, microcrystalline Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC)C(CO)O1 PTHCMJGKKRQCBF-UHFFFAOYSA-N 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 2
- 235000002837 Acetobacter xylinum Nutrition 0.000 claims 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims 1
- 241001136169 Komagataeibacter xylinus Species 0.000 claims 1
- 102000035195 Peptidases Human genes 0.000 claims 1
- 108091005804 Peptidases Proteins 0.000 claims 1
- 230000001580 bacterial effect Effects 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 229940075614 colloidal silicon dioxide Drugs 0.000 claims 1
- 238000012258 culturing Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 229920000126 latex Polymers 0.000 claims 1
- 239000004816 latex Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 125000001453 quaternary ammonium group Chemical group 0.000 claims 1
- 230000001954 sterilising effect Effects 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
- C08L7/02—Latex
-
- 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
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses an environment-friendly high-efficiency tire repair agent which is characterized by comprising the following components in percentage by mass: natural rubber latex, rubber particles, polyvinyl alcohol, microfibrillated plant fibers, bacterial cellulose, colloidal silica, sodium dodecyl sulfate and deionized water; the particle size of the rubber particles is 0.1-2 mm; the average diameter of the microfibrillated plant fiber is 80-120 nm; the colloidal silica has an average diameter of 1 to 10 nm; the average diameter of the fiber bundle of the bacterial cellulose is 40-60 nm. Compared with the prior art, the product of the invention is further improved in air tightness and injection performance, and is natural, environment-friendly and pollution-free.
Description
Technical Field
The invention relates to an environment-friendly high-efficiency tire repairing agent and a preparation method thereof.
Background
At present, the automobile tire repair agents mainly comprise two types:
the liquid mending agent is not inflated, is injected into the tire in advance before the automobile runs, the wheel rolls during the running of the automobile, centrifugal force is generated inside the wheel, and the liquid mending agent is uniformly distributed inside the tire under the action of the centrifugal force. When a tire is burst or punctured, the liquid repairing agent can reach the cavity in a short time to repair and bond to prevent air leakage; however, the repair method has the disadvantages of overlong condensation time, poor effect after condensation, poor wear resistance and easy secondary air leakage. Meanwhile, the long-term injection of liquid into the tire can affect the dynamic balance of the automobile, cause irreparable abrasion to the tire, and cause vibration and noise when the automobile runs.
The other is a pneumatic tire repairing aerosol, when a tire burst or puncture occurs in the running process of an automobile, the components of the gas and the tire repairing liquid which are uniformly distributed in the tire of the automobile are inflated to repair the tire; the condensation effect of the repairing mode is very poor, and although the addition of wood particles in the leak repairing agent improves certain wear resistance, the fluidity and the bonding performance are seriously reduced, so that the leak repairing time is long and the air pressure is insufficient.
Systems for temporarily repairing a punctured tire are known, for example, a system including a pressure-resistant container containing a puncture sealant and a high-pressure air source (e.g., a compressor) to inject the sealant into the tire through a gas valve and then continuously inject high-pressure air until the tire is inflated to a pressure sufficient for driving (hereinafter, also referred to as an "integrated system"). A puncture sealant or the like comprising a natural rubber latex and a resin tackifier and an antifreeze as described in patent documents 1 to 5 has been proposed as such a puncture sealant.
Puncture sealants for integrated systems are generally required to have puncture sealing properties, seal retention properties, injectability, storage stability, and other properties. For example, from the viewpoint of injectability, a puncture sealant with lower adhesion has been developed to ensure this property.
The puncture sealant thus adjusted to have a low viscosity can be injected into the tire in a shorter time; however, when sealing a perforation, the liquid sealant does not tend to remain in the perforated portion, but rather flows away very easily, which can lead to reduced perforation sealing performance. As described above, it is generally difficult to enhance the puncture sealing performance of the puncture sealant while facilitating the injection thereof, and also to ensure the seal retention performance at the same time. Therefore, a puncture sealant having an improved balance of these properties is desired. With the development of society, the use of vacuum tires in motorcycles and automobiles has become increasingly widespread in recent years. The vacuum tire has higher elasticity and wear resistance, good adhesive force and heat dissipation performance, and higher safety, comfort and stability than common tires. Because the vacuum tire has no inner tube, the repair is troublesome and the repair cost is high, the vacuum tire should be prevented from being punctured by sharp objects as much as possible in use. Once the tire is punctured and leaks, potential safety hazards are easily caused. At present, the method of driving a rubber nail is usually adopted for the air leakage of the vacuum tire of the motorcycle, but the crack must be enlarged when the rubber nail is driven, so that the tire is artificially damaged, and the air leakage phenomenon still exists after the tire is repaired.
The tyre repairing agent is a liquid material with strong repairing capability to puncture and air leakage of tyre by sharp object. The self-repairing agent is filled in the tire, and when the tire is punctured by a sharp object, the self-repairing agent blocks the air leakage port along with the air flow flowing to the gap under the action of the self weight of the vehicle and the air pressure of the tire, so that the air leakage of the tire is prevented. The current home-made tire puncture repair agents have a plurality of types, are also very effective in repairing normal temperature and small leak holes, still have a plurality of defects, and mainly comprise: (1) the corrosion of the rim causes the rim to rust, has side effect on the tire, causes the tire to become hard and deformed, ages in advance, and influences the service life of the tire; (2) the repaired crack is small, only the small crack can be repaired, and the large hole cannot be repaired; (3) the inner tube cannot be repaired; (4) the tire has limited antifreezing capability, can cause gel and freezing when used under severe cold conditions, cannot recover after freezing, or has failure due to new chemical combination reaction when the temperature of the tire is too high.
Disclosure of Invention
The invention provides an environment-friendly high-efficiency tire puncture sealant and a preparation method thereof, and the air tightness and the injection performance are further improved by matching natural high polymer materials with different scales.
In order to solve the technical problems, the invention adopts the following technical scheme:
the environment-friendly high-efficiency tire repair agent is characterized by comprising the following components in percentage by mass: natural rubber latex, rubber particles, polyvinyl alcohol, microfibrillated plant fiber, bacterial cellulose, colloidal silica, sodium dodecyl sulfate and deionized water; the particle size of the rubber particles is 0.1-2 mm; the cationic microfibrillated plant fiber has an average diameter of 20-200 nm; the colloidal silica has an average diameter of 1 to 10 nm; the average diameter of the fiber bundle of the bacterial cellulose is 40-60 nm.
Further, the polymerization degree of the polyvinyl alcohol is 1500-2500.
Further wherein the microfibrillated plant fiber is a cationic microfibrillated plant fiber having an average diameter of 80-120 nm.
Further, the microfibrillated plant fiber is produced by reacting a hydroxyl group in a material containing a cellulose fiber with a cationizing agent having a quaternary ammonium group, and then defibrating the obtained cation-modified fiber in the presence of water until the average fiber diameter is about 4 to 200 nm.
Further, the preparation method of the bacterial cellulose comprises the steps of fermenting the fermentation mother liquor, sterilizing the fermentation mother liquor, inoculating acetobacter xylinum into the sterilized and cooled fermentation mother liquor, performing static culture to prepare the bacterial cellulose gel sheet, cutting the bacterial cellulose gel sheet into particles, uniformly mixing the particles with a NaOH solution, heating, filtering and cleaning.
Further wherein the colloidal silica has an average diameter of 4 nm.
Further, the natural rubber latex is deproteinized natural rubber latex prepared by adding bacterial proteolytic enzyme into field latex, standing at 40 ℃ for 24 hours, and performing purification and concentration.
Further, the environment-friendly high-efficiency tire puncture sealant comprises, by mass, 30-40 parts of natural rubber latex, 5-10 parts of rubber particles, 2-5 parts of polyvinyl alcohol, 5-10 parts of microfibrillated plant fibers, 2-6 parts of bacterial cellulose, 2-6 parts of colloidal silica, 1-2 parts of sodium dodecyl sulfate and 10-20 parts of deionized water.
The invention also provides a preparation method of the environment-friendly high-efficiency tire puncture sealant, which is characterized by comprising the following steps of:
1) adding polyvinyl alcohol and rubber particles into deionized water, stirring for 2-5 hours at the temperature of 80-95 ℃, adding microfibrillated plant fiber, stirring for 10-30 minutes, and cooling to normal temperature;
2) adding bacterial cellulose and sodium dodecyl sulfate into the solution obtained in the step 1, stirring for 1-2 hours at 50-80 ℃, adding colloidal silicon dioxide, stirring for 10-30 minutes, and cooling to normal temperature;
3) adding natural latex, and stirring at room temperature for 0.5-1 hour.
The particle size of the rubber particles is 0.1-2 mm. The bacterial cellulose fiber is a fiber bundle with the thickness of 40-60 nanometers and is formed by combining microfibers with the diameter of 3-4 nanometers, and the fibers are mutually interwoven to form a developed hyperfine network structure. The microfibrillated plant fiber has an average diameter of 20 to 200nm, preferably a cationic microfibrillated plant fiber having an average diameter of 80 to 120 nm. The colloidal silica has an average diameter of 1 to 10nm, preferably 4 nm. Through the fiber distribution with different diameters in hierarchical distribution, in the process of tire repair, a compact sealing layer is formed in the gap, plant fibers with large diameters are used as a frame, bacterial fibers with medium diameters are used as a network, and nano silicon dioxide with small diameters is filled in the sealing layer, so that the formed sealing layer is greatly improved. When the hole with different sizes is repaired, the hole can be quickly repaired according to the size of the hole, so that efficient repair is realized.
The microfibrillated plant fiber is preferably a cationic microfibrillated plant fiber, has excellent complexation, can utilize its lipophilicity, is excellent in dispersion in natural rubber, and has better binding force with other components.
The materials selected by the invention are all natural polymer materials, have excellent affinity with each other, are easy to disperse in the natural rubber latex, have better fluidity and stability, and can roll along with the tire. And has no adverse effect on environment, human body and tire
The invention has the following beneficial effects:
the tire repair agent disclosed by the invention has the advantages of no corrosion to a rim, capability of repairing a large hole, good air tightness, good stability, no adverse effect on environment, a human body and a tire, and further improvement on the aspects of air tightness and injection performance.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
Colloidal silica is the "SNOWTEX series" manufactured by Nissan Chemical Industries, ltd, and includes: SNOWTEX (registered trademark) XS (average particle diameter: 4nm), S (average particle diameter: 9nm), 30 (average particle diameter: 12nm), 50 (average particle diameter: 21nm), XL (average particle diameter: 45nm), YL (average particle diameter: 65nm), ZL (average particle diameter: 85nm) and the like, and the bacterial cellulose was prepared according to the method for preparing bacterial cellulose of CN 1840677A.
Cationic microfibrillated plant fiber with a diameter of about 50,100,200nm was manufactured according to the manufacturing precautions for cationic microfibrillated plant fiber disclosed in CN 102812169B.
Preparation of natural rubber latex: the bacterial proteolytic enzyme was added to a field latex (solids content: 30 wt%) and left at 40 ℃ for 24 hours to provide a proteolytically degraded field latex. The above field latex was purified by a rotary flat membrane separation system according to the method described in JP-B3350593, and concentrated to a solid content of 60% by mass, thereby providing a deproteinized natural latex.
The environment-friendly high-efficiency tire puncture sealant comprises, by mass, 30-40 parts of natural rubber latex, 5-10 parts of rubber particles, 2-5 parts of polyvinyl alcohol, 5-10 parts of microfibrillated plant fibers, 2-6 parts of bacterial cellulose, 2-6 parts of colloidal silica, 1-2 parts of sodium dodecyl sulfate and 10-20 parts of deionized water.
The preparation method comprises the following steps:
1) adding polyvinyl alcohol and rubber particles into deionized water, stirring for 2-5 hours at the temperature of 80-95 ℃, adding microfibrillated plant fiber, stirring for 10-30 minutes, and cooling to normal temperature;
2) adding bacterial cellulose and lauryl sodium sulfate into the solution obtained in the step (1), stirring for 1-2 hours at 50-80 ℃, adding colloidal silicon dioxide, stirring for 10-30 minutes, and cooling to normal temperature;
3) adding natural latex, and stirring at room temperature for 0.5-1 hour.
Example 1
The environment-friendly high-efficiency puncture-sealing agent comprises, by mass, 35 parts of natural rubber latex, 8 parts of rubber particles, 4 parts of polyvinyl alcohol, 8 parts of microfibrillated plant fibers with the average diameter of 100nm, 4 parts of bacterial cellulose, 4 parts of colloidal silica with the average diameter of 4nm, 1.5 parts of sodium dodecyl sulfate and 15 parts of deionized water.
The preparation method comprises the following steps:
1) adding polyvinyl alcohol and rubber particles into deionized water, stirring for 2-5 hours at the temperature of 80-95 ℃, adding microfibrillated plant fiber, stirring for 10-30 minutes, and cooling to normal temperature;
2) adding bacterial cellulose and sodium dodecyl sulfate into the solution obtained in the step 1, stirring for 1-2 hours at 50-80 ℃, adding colloidal silicon dioxide, stirring for 10-30 minutes, and cooling to normal temperature;
3) adding natural latex, and stirring at room temperature for 0.5-1 hour.
Example 2
The environment-friendly high-efficiency puncture-sealing agent comprises, by mass, 30 parts of natural rubber latex, 10 parts of rubber particles, 2 parts of polyvinyl alcohol, 10 parts of 100nm microfibrillated plant fibers, 2 parts of bacterial cellulose, 6 parts of 9nm colloidal silica, 1 part of sodium dodecyl sulfate and 20 parts of deionized water.
The preparation method comprises the following steps:
1) adding polyvinyl alcohol and rubber particles into deionized water, stirring for 2-5 hours at the temperature of 80-95 ℃, adding microfibrillated plant fiber, stirring for 10-30 minutes, and cooling to normal temperature;
2) adding bacterial cellulose and sodium dodecyl sulfate into the solution obtained in the step 1, stirring for 1-2 hours at 50-80 ℃, adding colloidal silicon dioxide, stirring for 10-30 minutes, and cooling to normal temperature;
3) adding natural latex, and stirring at room temperature for 0.5-1 hour.
Example 3
The environment-friendly high-efficiency tire puncture sealant comprises, by mass, 40 parts of natural rubber latex, 5 parts of rubber particles, 5 parts of polyvinyl alcohol, 5 parts of 100nm microfibrillated plant fibers, 6 parts of bacterial cellulose, 2 parts of 4nm colloidal silica, 2 parts of sodium dodecyl sulfate and 10 parts of deionized water.
The preparation method comprises the following steps:
1) adding polyvinyl alcohol and rubber particles into deionized water, stirring for 2-5 hours at the temperature of 80-95 ℃, adding microfibrillated plant fiber, stirring for 10-30 minutes, and cooling to normal temperature;
2) adding bacterial cellulose and sodium dodecyl sulfate into the solution obtained in the step 1, stirring for 1-2 hours at 50-80 ℃, adding colloidal silicon dioxide, stirring for 10-30 minutes, and cooling to normal temperature;
3) adding natural latex, and stirring at room temperature for 0.5-1 hour.
Comparative example 1
Basically the same procedure as in example 1 was followed, except that microfibrillated plant fiber, bacterial cellulose and colloidal silica were not added to the raw materials for preparing the puncture sealant.
Comparative example 2
The procedure of example 1 was followed except that microfibrillated plant fiber was not added to the raw materials for preparing the puncture sealant.
Comparative example 3
Substantially the same procedure as in example 1 was conducted except that 20 parts by mass of microfibrillated plant fiber was used as a raw material for the puncture sealant.
Comparative example 4
Substantially the same procedure as in example 1 was conducted except that the microfibrillated plant fiber diameter in the raw material for the puncture sealant was 200 nm.
Comparative example 5
Substantially the same procedure as in example 1 was conducted except that the raw material for the puncture sealant was 20 parts by mass of microfibrillated plant fiber.
Comparative example 6
The procedure of example 1 was followed except that the raw materials for the puncture sealant were devoid of colloidal silica.
Comparative example 7
Substantially the same procedure as in example 1 was conducted except that the colloidal silica in the starting material for the puncture sealant was 20nm in diameter.
Comparative example 8
Basically the same procedure as in example 1 was conducted except that the amount of colloidal silica in the raw material for the puncture sealant was 10 parts by mass.
Perforation sealing performance:
a puncture was made in a tire No. 185/65R14 using a nail with a diameter of 4.0 mm. After nail removal, 500ml of puncture sealant was injected into the tire and air pressure was applied up to 200 kPa. Thereafter, the tire was rotated on a drum under a load of 3.5kN, and the time required until the perforations were sealed was determined by measuring the amount of air leakage and expressed as a scale index of 1 to 5 (value of conventional product: 3). A higher index indicates better puncture sealing performance.
Seal retention performance: the above tires were inspected for air leakage from the perforations during the run 500km after sealing. The results obtained are expressed in two-point scale: "(no air leakage) and" × "(air leakage).
The injectability:
the puncture sealant was injected into the tire at a temperature of 20 ℃ using an integrated puncture repair system. After the puncture sealant was injected, the injectability was evaluated by measuring the increase in tire pressure. The evaluation results are shown in 1-5 grades.
| Experimental groups | Sealing performance of perforation | Seal retention performance | Injectability |
| Example 1 | 5 | ○ | 5 |
| Example 2 | 5 | ○ | 5 |
| Example 3 | 5 | ○ | 5 |
| Comparative example 1 | 2 | × | 3 |
| Comparative example 2 | 3 | × | 4 |
| Comparative example 3 | 4 | ○ | 3 |
| Comparative example 4 | 3 | × | 3 |
| Comparative example 5 | 4 | ○ | 3 |
| Comparative example 6 | 3 | × | 4 |
| Comparative example 7 | 3 | × | 3 |
| Comparative example 8 | 4 | ○ | 3。 |
From the above table, it can be seen that: the tire repair agent disclosed by the invention is used by adding natural polymer materials with different scales and a certain proportion of content, has no corrosion to a rim, can repair a large hole, has good air tightness and good stability, has no adverse effect on the environment, a human body and a tire, and is further improved in the aspects of air tightness and injection performance.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (7)
1. The environment-friendly high-efficiency tire repair agent is characterized by comprising the following components in percentage by mass: natural rubber latex, rubber particles, polyvinyl alcohol, microfibrillated plant fibers, bacterial cellulose, colloidal silica, sodium dodecyl sulfate and deionized water; the particle size of the rubber particles is 0.1-2 mm; the average diameter of the microfibrillated plant fiber is 80-120 nm; the colloidal silica has an average diameter of 1 to 10 nm; the average diameter of the fiber bundle of the bacterial cellulose is 40-60 nm;
the preparation method of the microfibrillated plant fiber comprises the following steps: the hydroxyl groups in the material containing the cellulosic fibres are reacted with a cationising agent having quaternary ammonium groups and the resulting cationically modified fibres are defibrated in the presence of water to an average fibre diameter of 80-120 nm.
2. The environment-friendly high-efficiency tire puncture sealant according to claim 1, wherein the polymerization degree of the polyvinyl alcohol is 1500-2500.
3. The environment-friendly high-efficiency puncture-mending agent as claimed in claim 1, wherein the preparation method of the bacterial cellulose is fermenting the fermentation mother liquor, sterilizing the fermentation mother liquor, inoculating acetobacter xylinum into the sterilized and cooled fermentation mother liquor, statically culturing to obtain bacterial cellulose gel pieces, cutting the bacterial cellulose gel pieces into particles, uniformly mixing the particles with NaOH solution, heating, filtering and cleaning.
4. The environmentally friendly high efficiency puncture sealant according to claim 1, wherein the colloidal silica has an average diameter of 4 nm.
5. The environment-friendly high-efficiency puncture sealant as claimed in claim 1, wherein the natural rubber latex is deproteinized natural rubber latex prepared by adding bacterial proteolytic enzyme into field latex, standing at 40 ℃ for 24 hours, and performing purification and concentration.
6. The environment-friendly high-efficiency puncture-sealing agent according to claim 1, wherein the environment-friendly high-efficiency puncture-sealing agent comprises, by mass, 30-40 parts of natural rubber latex, 5-10 parts of rubber particles, 2-5 parts of polyvinyl alcohol, 5-10 parts of microfibrillated plant fibers, 2-6 parts of bacterial cellulose, 2-6 parts of colloidal silica, 1-2 parts of sodium dodecyl sulfate and 10-20 parts of deionized water.
7. The preparation method of the environment-friendly high-efficiency tire puncture sealant as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
1) adding polyvinyl alcohol and rubber particles into deionized water, stirring for 2-5 hours at the temperature of 80-95 ℃, adding microfibrillated plant fiber, stirring for 10-30 minutes, and cooling to normal temperature;
2) adding bacterial cellulose and sodium dodecyl sulfate into the solution obtained in the step 1, stirring for 1-2 hours at 50-80 ℃, adding colloidal silicon dioxide, stirring for 10-30 minutes, and cooling to normal temperature;
3) adding natural latex, and stirring at room temperature for 0.5-1 hour.
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| CN103497731A (en) * | 2013-10-18 | 2014-01-08 | 庄汉明 | Tire self-mending agent and method for preparing same |
| CN107955228A (en) * | 2017-12-16 | 2018-04-24 | 长沙无道工业设计有限公司 | A kind of mending agent and preparation method thereof |
| CN108948666A (en) * | 2018-07-06 | 2018-12-07 | 佛山市高明区爪和新材料科技有限公司 | A kind of preparation method of Automatic-inflating tyre repair liquid |
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| CN111320789A (en) | 2020-06-23 |
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