Fluoride-free durable super-hydrophobic cotton cloth and preparation method and application thereof

A super-hydrophobic, cotton technology, applied in separation methods, chemical instruments and methods, textiles and papermaking, etc., can solve problems such as the difficulty of industrialization of electrospinning process, the weak mechanical properties of super-hydrophobic fabrics, and the high price of fluorine-containing compounds. , to achieve the effect of good self-cleaning ability, huge industrial application potential, good hydrophobic ability

Active Publication Date: 2020-12-15
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current superhydrophobic fabrics also have many limitations
First of all, a large number of superhydrophobic materials use fluorine-containing compounds to modify materials. Fluorine-containing compounds are not only expensive, but also unfriendly to the environment.
Second, superhydrophobic fabrics are not mechanically strong and face the risk of losing their hydrophobicity after abrasion
Finally, the construction methods of some reported superhydrophobic fabrics are cumbersome or have harsh production conditions, such as the use of electrospinning to manufacture superhydrophobic fabrics, and the electrospinning process is difficult to achieve industrialization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Fluoride-free durable super-hydrophobic cotton cloth and preparation method and application thereof
  • Fluoride-free durable super-hydrophobic cotton cloth and preparation method and application thereof
  • Fluoride-free durable super-hydrophobic cotton cloth and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] First, ultrasonically disperse 1 part of silicon dioxide with a particle size of 20nm in 150 parts of solvent, add 50 parts of ammonia water, add 1.5 parts of 3-methacryloxypropyltrimethoxysilane, and then stir at 40°C 24h. After the solution is cooled, centrifuge at a speed of 6000 r / min for 5 min, and wash with an aqueous solution with a mass fraction of 75% ethanol. Repeat 3 times, and dry at 40° C. for 24 hours to obtain modified silica as a white solid. Add 10 parts of acetic acid to the mixture of 3 parts of KH-580 and 40 parts of ethanol, soak the cotton cloth in the solution, heat and react at 40°C for 2 hours, take out the cotton cloth, and wash off the excess KH-580 with ethyl acetate , and dried at 70°C for 3h. Add 0.1 parts of KH-570@SiO 2 Dissolve in 3 parts of acetone, add 0.05 parts of methacryloxy polydimethylsiloxane, 0.0025 parts of benzoin dimethyl ether, ultrasonically treat the solution, soak the pretreated cotton cloth in the ultrasonically trea...

Embodiment 2

[0073] First, ultrasonically disperse 0.5 parts of silicon dioxide with a particle size of 40 nm in 100 parts of ethyl acetate, add 40 parts of ammonia water, add 0.5 parts of 3-methacryloxypropyltrimethoxysilane, and then Under stirring for 12h. After the solution is cooled, centrifuge at a speed of 7000r / min for 10min, and wash with an aqueous solution with a mass fraction of 50% ethanol. Repeat twice, and dry at 40° C. for 22 hours to obtain modified silica as a white solid. Add 5 parts of acetic acid to the mixture of 2 parts of KH-580 and 20 parts of ethyl acetate, soak the cotton cloth in the solution, heat and react at 40°C for 2 hours, take out the cotton cloth, and wash off the excess KH-580 with ethanol , and dried at 40°C for 4h. Add 0.1 parts of KH-570@SiO 2 Dissolve in 1 part of tetrahydrofuran, add 0.05 part of methacryloxy polydimethylsiloxane, 0.0025 part of benzoin butyl ether, ultrasonically treat the solution, soak the pretreated cotton cloth in the ultra...

Embodiment 3

[0075] First, ultrasonically disperse 2 parts of silicon dioxide with a particle size of 100nm in 200 parts of tetrahydrofuran, add 60 parts of ammonia water, add 3 parts of 3-methacryloxypropyltrimethoxysilane, and then stir at 40°C 24h. After the solution is cooled, centrifuge it at a speed of 5000r / min for 8min, and wash it with an aqueous solution with a mass fraction of 75% ethanol. Repeat 4 times, and dry at 70° C. for 12 hours to obtain white solid modified silica. Add 10 parts of acetic acid to the mixed solution of 5 parts of KH-580 and 40 parts of tetrahydrofuran, soak the cotton cloth in the solution, heat and react at 70°C for 4 hours, take out the cotton cloth, wash off the excess KH-580 with isopropanol, Dry at 120°C for 2h. Add 0.5 parts of KH-570@SiO 2 Dissolve in 5 parts of dichloromethane, add 0.5 parts of methacryloxy polydimethylsiloxane, 0.005 parts of benzoin isopropyl ether, ultrasonically treat the solution, soak the pretreated cotton cloth after ult...

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Abstract

The invention discloses fluoride-free durable super-hydrophobic cotton cloth and a preparation method and application thereof, and belongs to the field of super-hydrophobic materials. The preparationmethod comprises the following steps that hydrolysis reaction is carried out on 3-methacryloxypropyltrimethoxy silane and silicon dioxide to obtain modified silicon dioxide; secondly, cotton cloth fibers are modified by using 3-mercaptopropyltriethoxysilane, so that mercapto groups on the surfaces of the fibers are functionalized; and finally, under the action of a photoinitiator and illuminationof a mercury lamp, sulfydryl-alkene click chemical reaction is carried out on sulfhydrylation cotton cloth, methacryloyloxy polydimethylsiloxane and the modified silicon dioxide to prepare the super-hydrophobic cotton cloth. The super-hydrophobic cotton cloth prepared by the method has self-cleaning property and an oil-water separation function. Raw materials are cheap, easy to obtain and environmentally friendly, and the prepared material is stable in hydrophobicity and has good wear resistance. Meanwhile, the preparation method is simple, mild in preparation condition and convenient for large-scale production, and has huge industrial application potential.

Description

technical field [0001] The invention belongs to the field of superhydrophobic materials, and in particular relates to a fluorine-free and durable superhydrophobic cotton cloth and a preparation method and application thereof. Background technique [0002] Fabrics with superhydrophobic function have great application value in self-cleaning and oil-water separation. The construction of superhydrophobic materials mainly starts from two aspects, one is to introduce elements with low surface energy to reduce the surface energy of the material, and the other is to construct micro-nano structures to increase the surface roughness. However, current superhydrophobic fabrics also have many limitations. First of all, a large number of superhydrophobic materials currently use fluorine-containing compounds to modify materials. Fluorine-containing compounds are not only expensive, but also unfriendly to the environment. Second, superhydrophobic fabrics are not mechanically strong and fa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M13/513D06M11/79D06M10/00B01D17/022D06M101/06
CPCB01D17/0202D06M10/001D06M11/79D06M13/5135D06M15/643D06M2101/06D06M2200/01D06M2200/12
Inventor 贺小华马君君
Owner EAST CHINA NORMAL UNIV
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