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Waterproof cloth surface flexible composite material and preparation method thereof

A composite material and cloth surface technology, applied in the direction of chemical instruments and methods, synthetic resin layered products, liquid-repellent fibers, etc., can solve the problems of unsatisfactory durability and fastness, and achieve improved service life and excellent durability The effect of improving the durability and fastness

Active Publication Date: 2020-08-28
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the unsatisfactory durability of the current superhydrophobic fabrics, the present invention utilizes the one-electron free radicals after aromatic amine diazo reduction to form covalent bonds with free radicals formed by homolysis on natural fibers Bonding, thereby improving the durability fastness of superhydrophobic fabrics

Method used

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  • Waterproof cloth surface flexible composite material and preparation method thereof
  • Waterproof cloth surface flexible composite material and preparation method thereof
  • Waterproof cloth surface flexible composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Preparation of 3,5-bis(trifluoromethyl)aniline diazonium salt

[0061] The three-necked flask is equipped with a thermometer, the T-shaped tee is equipped with a balloon, and it is equipped with magnetic stirring. Add 60 ml of 1.5wt% hydrochloric acid solution, cool to 0°C in a cold bath, add 228 mg of sodium nitrite, cool to -5°C in a cold bath, stir and dissolve to form a sodium nitrite hydrochloric acid solution; then add 687.39 mg of 3,5- The diazotization reaction of bis(trifluoromethyl)aniline was incubated (-5°C) for 1 hour to generate 3,5-bis(trifluoromethyl)aniline diazonium salt, which was directly used in step (2).

[0062] (2) Generate 3,5-bis(trifluoromethyl)benzene radical

[0063] Add 2g of iron powder to the above diazonium salt solution, and heat the reaction solution to room temperature for 6 hours. 3,5-bis(trifluoromethyl)aniline diazonium salt is reduced to 3,5- Bis(trifluoromethyl)benzene radical, used directly in step (3).

[0064] (3) Prepa...

Embodiment 2

[0076] (1) Generate 3,5-bis(trifluoromethyl)aniline diazonium salt:

[0077] The three-necked flask is equipped with a thermometer, the T-shaped tee is equipped with a balloon, and it is equipped with magnetic stirring. Add 60 ml of 3wt% hydrochloric acid solution, cool to 0°C in a cold bath, add 228 mg of sodium nitrite, cool to -5°C in a cold bath, stir and dissolve to form a sodium nitrite hydrochloric acid solution. Add 687.39mg of 3,5-bis(trifluoromethyl)aniline and keep diazotization for 1h to generate 3,5-bis(trifluoromethyl)aniline diazonium salt.

[0078] (2) Generate 3,5-bis(trifluoromethyl)benzene radical:

[0079] Add 2g of iron powder to the above diazonium salt solution, and heat the reaction solution to room temperature for 8 hours. 3,5-bis(trifluoromethyl)aniline diazonium salt is reduced to 3,5- Bis(trifluoromethyl)benzene radical, used directly in step (3).

[0080] (3) Preparation of superhydrophobic fabric

[0081] Put a piece of 3×5cm 2 The cotton fab...

Embodiment 3

[0090] (1) generate m -Nafluorobutylaniline diazonium salt

[0091] The three-necked flask is equipped with a thermometer, the T-shaped tee is equipped with a balloon, and it is equipped with magnetic stirring. Add 60 ml of 1.5wt% hydrochloric acid solution, cool to 0°C in a cold bath, add 228 mg of sodium nitrite, cool to -5°C in a cold bath, stir and dissolve to form a sodium nitrite hydrochloric acid solution; then add 687.39 mg of 3,5-bis Equimolar amounts of (trifluoromethyl)aniline m -Nafluorobutylaniline was incubated for 1h to generate m -Nafluorobutylaniline diazonium salt, used directly in step (2).

[0092] The chemical structural formula of 3,5-bis(trifluoromethyl)aniline is as follows:

[0093]

[0094] m -The chemical structural formula of nonafluorobutylaniline is as follows:

[0095]

[0096] (2) generate m- nonafluorobutylbenzene radical

[0097] Add 2g of iron powder to the above-mentioned diazonium salt solution, and the reaction solution is warm...

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Abstract

The invention discloses a waterproof cloth surface flexible composite material and a preparation method thereof. The waterproof cloth surface flexible composite material is characterized in that one surface of a super-hydrophobic fabric is bonded with a plastic film by using an adhesive to obtain the washable waterproof cloth surface flexible composite material. The preparation method comprises the following steps of diazotizing a fluorine-containing alkyl aniline monomer in a dilute acid solution of sodium nitrite to form fluorine-containing alkyl benzene diazonium salt; carrying out reduction reaction on the fluorine-containing alkylbenzene diazonium salt under the action of a reducing agent to obtain a fluorine-containing alkylbenzene free radical monomer; and carrying out in-situ single-electron free radical covalent graft polymerization reaction on the fluorine-containing alkylbenzene free radical monomer in the fabric fiber to obtain the super-hydrophobic fabric. As the super-hydrophobic fabric obtained through chemical grafting, the fiber surface coating is combined with the fiber through covalent bonds, so that the super-hydrophobic fabric has excellent fastness, the flexibility and the hand feeling of the fabric are not influenced, and the problems of poor fastness and poor hand feeling of the super-hydrophobic fabric obtained through methods such as the coating are solved.

Description

technical field [0001] The invention relates to a flexible composite material for waterproof cloth surface and a preparation method thereof, in particular to a method for grafting and polymerizing a fluorine-containing alkyl aromatic amine through a covalent bond of a diazo radical, and a superhydrophobic material prepared by modifying the surface of a fiber The fabric belongs to the technical field of special functional textiles and its preparation. Background technique [0002] Flexible fabric materials are widely used, such as tent fabrics, wall coverings, packaging materials, barrier materials or intercalation materials, etc. Among them, flexible composite materials with hydrophobic properties are also widely concerned, and have application value in some moisture-proof and moisture-proof fields. . In the traditional method, synthesizing fluorine-containing polyacrylate emulsion, and then finishing the fabric, can give the treated fabric a good water-repellent effect and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/37D06M13/08B32B27/00B32B27/12B32B7/12B32B33/00B32B9/02B32B9/04D06M101/06
CPCD06M15/37D06M13/08B32B5/02B32B27/00B32B27/12B32B7/12B32B33/00D06M2101/06D06M2200/12B32B2262/06
Inventor 李战雄杨晓玥
Owner SUZHOU UNIV
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