Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of superhydrophobic fabric and preparation method thereof

A super-hydrophobic and fabric technology, which is applied in the direction of plant fibers, textiles and papermaking, and liquid-repellent fibers, can solve the problems of unsatisfactory durability and fastness, and achieve easy industrial production and promotion, low price, and simple preparation process Effect

Active Publication Date: 2022-04-26
SUZHOU UNIV
View PDF3 Cites 0 Cited by
  • 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

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of superhydrophobic fabric and preparation method thereof
  • A kind of superhydrophobic fabric and preparation method thereof
  • A kind of superhydrophobic fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] The preparation method of above-mentioned superhydrophobic fabric disclosed by the present invention is as follows:

[0052] (1) Diazotization: Diazotization of fluorine-containing alkylaniline monomers in dilute acid solution of sodium nitrite to form fluorine-containing alkylbenzene diazonium salts;

[0053] (2) Reduction: the fluorine-containing alkylbenzene diazonium salt is transformed into a fluorine-containing alkylbenzene radical monomer under the action of a reducing agent;

[0054] (3) Covalent graft polymerization: The fluorine-containing alkylbenzene radical monomer and the free radical on the fabric fiber undergo in-situ single-electron free radical covalent graft polymerization to obtain a superhydrophobic fabric.

Embodiment 1

[0057] (1) Preparation of 3,5-bis(trifluoromethyl)aniline diazonium salt

[0058] 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).

[0059] (2) Generate 3,5-bis(trifluoromethyl)benzene radical

[0060] 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).

[0061] (3) Prepa...

Embodiment 2

[0072] (1) Generate 3,5-bis(trifluoromethyl)aniline diazonium salt:

[0073] 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.

[0074] (2) Generate 3,5-bis(trifluoromethyl)benzene radical:

[0075] 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).

[0076] (3) Preparation of superhydrophobic fabric

[0077] Put a piece of 3×5cm 2 The cotton fab...

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
Login to View More

PUM

PropertyMeasurementUnit
contact angleaaaaaaaaaa
Login to View More

Abstract

The invention discloses a superhydrophobic fabric and a preparation method thereof. Using fluoroalkyl aromatic amine as the reaction monomer and sodium nitrite as the diazotization reagent, the aromatic amine diazonium salt is obtained through low-temperature diazotization in dilute acid solution; the diazonium salt is reduced under the action of a chemical reducing agent A fluorine-containing aromatic radical is formed; the diazo radical monomer undergoes a single-electron free radical-initiated polymerization reaction on natural fabric fibers to prepare a superhydrophobic fabric with a roughened fiber surface. The fabric treatment of the present invention is completed by grafting and polymerization at room temperature, the production process conditions are mild, high equipment requirements and possible potential risks of electrochemical reduction are avoided, and the product preparation process is simple and safe in operation. As a super-hydrophobic fabric obtained by chemical grafting, the fiber surface coating is covalently bonded to the fiber, which has excellent fastness and does not affect the wearing performance of the fabric. It solves the problem of obtaining super-hydrophobic fabric fastness by coating and other methods. Poor puzzle.

Description

technical field [0001] The invention relates to a superhydrophobic fabric 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 fabric prepared by modifying the surface of a fiber, belonging to The field of special functional textiles and its preparation technology. Background technique [0002] At present, for the water-repellent finishing of textiles, in addition to the traditional method of directly finishing fabrics with fluorine-containing polyacrylate emulsions, there are ring-opening polymerization (ROP), radiation induction (γ rays, ultraviolet rays and plasma), atom transfer radical polymerization (ATRP) ) and coating and other treatment methods. [0003] Among them, the fluorine-containing polyacrylate emulsion synthesized in the traditional method can endow the treated fabric with a good water-repellent effect and a hig...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/37D06M101/06
CPCD06M15/37D06M2101/06D06M2200/12
Inventor 李武龙李战雄刘群孙弋纵亚坤
Owner SUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com