CN103966686B - A kind of preparation method of photocatalytic self-cleaning curtain fiber - Google Patents

Abstract

The invention discloses a kind of preparation method of photocatalytic self-cleaning curtain fiber, put into extruder after nano titanium dioxide powder, nanometer diatom ooze powder, wetting agent and pellet being mixed, at the operating temperature of extruder is 180 DEG C ~ 240 DEG C, extrudes also pelletizing obtains photocatalytic self-cleaning master batch; In pellet, add photocatalytic self-cleaning master batch, after mixing, put into extruder, extrude at the operating temperature of extruder is 180 DEG C ~ 240 DEG C and be spun into long filament or staple fibre through spinning equipment.The curtain fibrous material made by the inventive method can not only absorb organic matter and it effectively be decomposed, and can also decompose peculiar smell, regulating environmental humidity etc. that everyday life produces simultaneously.

Description

A kind of preparation method of photocatalytic self-cleaning curtain fiber

technical field

The invention belongs to the technical field of curtain materials, and in particular relates to a preparation method of photocatalytic self-cleaning curtain fibers.

Background technique

Curtains are floor coverings made of cotton, hemp, wool, silk, grass and other natural fibers or chemical synthetic fiber materials that are braided, tufted or woven by hand or mechanically. Covering the ground of residences, hotels, gymnasiums, exhibition halls, vehicles, ships, aircraft, etc. With its tight and breathable structure, the curtain can absorb and isolate sound waves, and has a good sound insulation effect. The fluff on the surface of the curtain can capture and absorb dust particles floating in the air, effectively improving indoor air quality. Curtains are a kind of soft paving material, which is different from hard floor paving materials such as marble and ceramic tiles. Curtains have rich patterns, gorgeous colors, and diverse shapes, which can beautify your decoration environment and reflect your personality. Curtains do not have radiation, do not emit gases that are not conducive to health such as formaldehyde, and meet various environmental protection requirements. The foot feel of the curtain is comfortable, and the ground materials such as wooden floor, marble, tile will feel uncomfortable in the cold and humid environment, and the curtain can solve this problem very well. However, due to long-term use, due to ventilation problems, furniture adhesives, decoration materials, smoking, etc., on the one hand, the environmental humidity is not easy to control, which makes the curtains easy to breed mold. On the other hand, it contains formaldehyde, cresol, benzene, nicotine, and nitrogen oxides. The release of such gases affects the health of personnel in the environment.

Activated carbon is a hydrophobic adsorbent prepared by high-temperature carbonization and activation from carbon-containing substances as raw materials. Activated carbon contains a large number of micropores, has a huge specific surface area, can effectively remove chroma and odor, can effectively adsorb chlorinated hydrocarbons, organic phosphorus and carbamate pesticides, and can also adsorb phenyl ether and n-nitrochloride Benzene, naphthalene, ethylene, xylenol, phenol, DDT, aldrin, alkylbenzenesulfonic acids and many esters and aromatic compounds. Activated carbon has been widely used in water and gas purification in petrochemical industry, power industry, chemical industry, food industry, environmental protection industry, etc.

Diatom mud is a natural substance deposited by aquatic plankton living millions of years ago - diatoms. The main component is opal, which is rich in a variety of beneficial minerals and has a light and soft texture. The surface of its particles is shown by an electron microscope It has countless tiny pores, the porosity is over 90%, and the specific surface area is as high as 65m ² /g. It is this outstanding molecular sieve structure that determines its unique function - it has extremely strong physical adsorption performance and ion exchange performance. Spraying water on a large area of the wall can absorb a large amount of water, indicating that the adsorption is extremely strong and slow Continuous release of negative oxygen ions can effectively decompose formaldehyde, benzene, radon and other harmful carcinogens.

Titanium dioxide has strong adsorption to many organic pollutants and high catalytic oxidation activity, so it plays an extremely important role in environmental pollution control and is widely used in photocatalytic treatment of various organic substances. In recent years, titanium dioxide has become the most popular green photocatalyst.

Adding active carbon, diatom mud and titanium dioxide into the curtain fiber material can make the curtain a kind of curtain product with self-cleaning ability.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for preparing photocatalyzed self-cleaning curtain fibers by overcoming the above shortcomings of the prior art.

In order to solve the problems of the technologies described above, the technical scheme adopted in the present invention is as follows:

A preparation method of photocatalytic self-cleaning curtain fiber, comprising the steps of:

(1) Put nano-titanium dioxide powder, nano-diatom mud powder, wetting agent and pellets into the extruder after mixing, wherein, the mass percentage of each component is: nano-titanium dioxide powder 15% ~ 40%, nano Diatom mud powder 10% ~ 40%, wetting agent 1% ~ 1.5%, the balance is pellets, extruded and pelletized at the working temperature of the extruder at 180 ° C ~ 240 ° C to obtain photocatalytic self-cleaning mother grain;

(2) Add the photocatalytic self-cleaning masterbatch prepared in step (1) to the pellets, and put them into the extruder after mixing, wherein, in the mixture composed of the pellets and the photocatalytic self-cleaning masterbatch, light The mass percentage of the catalytic self-cleaning masterbatch is 5%-10%, and the balance is pellets, which are extruded at the working temperature of the extruder at 180°C to 240°C and spun into filaments or short fibers through spinning equipment .

In step (1), the particle size of the nanometer titanium dioxide powder is 5-10 nm.

In step (1), the nano diatom ooze powder is composed of the following components in parts by weight: 35-50 parts of activated carbon white powder, 35-45 parts of diatom ooze, and 5-10 parts of rare earth activator.

Wherein, the rare earth activator is YPO4:Ce, Th or MgSrBF3:Eu.

Wherein, in the nano diatom ooze powder, the particle diameter of each component is 50-100 nm, and the BET surface area is 5-300 m ² /g.

In steps (1) and (2), the pellets are polyamide pellets, polypropylene pellets or polyethylene terephthalate pellets.

In step (1), the wetting agent is one of polyether-modified polysiloxane wetting agents, such as SP-997, SP-998 and the like.

Beneficial effects: the curtain fiber material prepared by the invention can not only absorb organic matter and effectively decompose it, but also decompose the peculiar smell produced in daily life and adjust the environmental humidity, and the manufacturing process is simple, suitable for industrial production, and the fiber material of the invention can be applied The manufactured curtains have the advantages of purifying air, decomposing harmful substances, and being economical and practical.

detailed description

The present invention can be better understood from the following examples. However, those skilled in the art can easily understand that the content described in the embodiments is only for illustrating the present invention, and should not and will not limit the present invention described in the claims.

Example 1:

(1) Preparation of photocatalytic self-cleaning masterbatch.

Commercially available nano-titanium dioxide powder (mass standard particle size 5-10nm) 150g, nano-diatom mud powder 100g (among them, activated carbon white powder (mass standard particle size 50-100nm, BET surface area 5-300m ² /g) 43.75 g. Diatom mud (quality standard particle size is 50-100nm, BET surface area is 5-300m ² /g) 43.75g, YPO4:Ce, Th (quality standard particle size is 50-100nm, BET surface area is 5-300m ² /g) 12.5g), wetting agent SP-99710g and polyamide pellets 740g, mixed evenly and put into the extruder, extruded and pelletized at the working temperature of the extruder at 180°C to obtain photocatalytic self- clean masterbatch;

(2) Preparation of photocatalytic self-cleaning curtains and curtain fiber materials.

Add 1000g of photocatalytic self-cleaning masterbatches prepared in step (1) to 19000g of polyamide pellets, put them into the extruder after mixing, extrude and spin at the working temperature of the extruder at 180°C Equipment for spinning long or short fibers.

Example 2:

(1) Preparation of photocatalytic self-cleaning masterbatch

Commercially available nano-titanium dioxide powder (quality standard particle size 5-10nm) 40kg, nano-diatom mud powder 40kg (activated carbon white powder (quality standard particle size is 50-100nm, BET surface area is 5-300m ² /g) 20kg, silicon Algae mud (quality standard particle size is 50-100nm, BET surface area is 5-300m ² /g) 18kg, MgSrBF3:Eu (quality standard particle size is 50-100nm, BET surface area is 5-300m ² /g) 2kg), 1.5kg of wetting agent SP-998 and 18.5kg of polypropylene pellets are mixed and put into the extruder, extruded and pelletized at the working temperature of the extruder at 240°C to obtain photocatalytic self-cleaning masterbatch;

(2) Preparation of photocatalytic self-cleaning curtains and curtain fiber materials

Add 100kg of photocatalytic self-cleaning masterbatches prepared in step (1) to 900kg polypropylene pellets, put them into the extruder after mixing, extrude and spin at the working temperature of the extruder at 240°C Equipment for spinning long or short fibers.

Example 3:

The properties of the photocatalytic self-cleaning curtain and curtain fiber material prepared by the present invention are as follows:

in,

Determination of formaldehyde, benzene or ammonia adsorption capacity under dark conditions:

Put 10ml of formaldehyde, benzene or ammonia in a closed space of 1m ³ , equilibrate for 24 hours at 25°C and one atmospheric pressure, take out formaldehyde, benzene or ammonia, take a sample to measure the content of formaldehyde, benzene or ammonia in the closed space, and then put 1g into it for testing The material is adsorbed at 25°C for 24 hours, then the content of formaldehyde, benzene or ammonia in the closed space is measured, and the adsorption capacity of formaldehyde, benzene and ammonia under dark conditions is calculated.

Determination of formaldehyde, benzene or ammonia decomposition ability (mg/m ³ /g) under light conditions:

Put 10ml of formaldehyde, benzene or ammonia water in a closed space of ^1m3 made of all glass, equilibrate for 24h at 25°C and one atmospheric pressure, then put 1g of test material, absorb and decompose at 25°C for 24h, and then measure the closed space The total formaldehyde, benzene or ammonia content in the battery is used to calculate the formaldehyde decomposition ability under light conditions.

Water absorption performance test: Take a certain amount of test material, put it in water at 25°C for 30 minutes at an atmospheric pressure, take it out and dry the surface moisture with filter paper, weigh it and calculate the water absorption.

Determination of the optimal environmental relative humidity control range:

In a closed space of 1m ³ , under 25°C and one atmospheric pressure, put water to balance until the relative humidity of the space is close to 100%, and then put 100g of test materials, when the change rate of relative humidity is less than 1%/h, it is considered to have reached the highest relative humidity Humidity: In a closed space of 1m ³ , at 25°C and an atmospheric pressure, put a desiccant to make the relative humidity of the space close to 20%, then remove the desiccant, and put 100g of test material saturated with adsorbed water, when the relative humidity changes A rate of less than 1%/h is considered to have reached the lowest relative humidity.

Claims (5)

1. a preparation method of photocatalytic self-cleaning curtain fiber, is characterized in that, comprises the steps: (1) Put nano-titanium dioxide powder, nano-diatom mud powder, wetting agent and pellets into the extruder after mixing, wherein, the mass percentage of each component is: nano-titanium dioxide powder 15% ~ 40%, nano Diatom mud powder 10% ~ 40%, wetting agent 1% ~ 1.5%, the balance is pellets, extruded and pelletized at the working temperature of the extruder at 180 ° C ~ 240 ° C to obtain photocatalytic self-cleaning mother grain; (2) Add the photocatalytic self-cleaning masterbatch prepared in step (1) to the pellets, and put them into the extruder after mixing, wherein, in the mixture composed of the pellets and the photocatalytic self-cleaning masterbatch, light The mass percentage of the catalytic self-cleaning masterbatch is 5%-10%, and the balance is pellets, which are extruded at the working temperature of the extruder at 180°C to 240°C and spun into filaments or short fibers through spinning equipment ; In step (1), the nano diatom mud powder is composed of the following components in parts by weight: 35 to 50 parts of activated carbon white powder, 35 to 45 parts of diatom mud, and 5 to 10 parts of rare earth activator; The rare earth activator is YPO ₄ :Ce,Th or MgSrBF ₃ :Eu; In step (1), the wetting agent is a polyether-modified polysiloxane wetting agent. 2. The preparation method of photocatalytic self-cleaning curtain fiber according to claim 1, characterized in that, in step (1), the particle size of the nanometer titanium dioxide powder is 5-10 nm. 3. The preparation method of photocatalytic self-cleaning curtain fiber according to claim 1, characterized in that, in the nano-diatom mud powder, the particle diameter of each component is 50-100nm, and the BET surface area is 5-300m ² /g. 4. the preparation method of photocatalytic self-cleaning curtain fiber according to claim 1 is characterized in that, in step (1) and (2), described pellet is polyamide pellet, polypropylene pellet or polypropylene pellet. Ethylene terephthalate pellets. 5. The preparation method of photocatalytic self-cleaning curtain fiber according to claim 1, characterized in that, the wetting agent is SP-997 or SP-998.