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Preparation method of hydrophobic textile with porous surface structure

A hydrophobic and hydrophobic technology, applied in textiles and papermaking, liquid-repellent fibers, animal fibers, etc., can solve the problems of fabric performance degradation, high finishing temperature, self-cleaning performance is difficult to meet the requirements, etc., to achieve super-hydrophobic performance Excellent, effect of improving surface roughness

Active Publication Date: 2022-02-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages that the existing hydrophobic fabrics have too high finishing temperature, the performance of the fabric after finishing and the self-cleaning performance are difficult to meet the requirements, the purpose of the present invention is to provide a preparation of superhydrophobic porous fabrics with mild reaction conditions, simple operation and reduced steps method

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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  • Preparation method of hydrophobic textile with porous surface structure
  • Preparation method of hydrophobic textile with porous surface structure
  • Preparation method of hydrophobic textile with porous surface structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A kind of method for preparing hydrophobic cotton fabric

[0029] Get 0.090g fluorine-containing POSS block copolymer POSS-(PTFEMA) 8 (molecular weight 13500) dissolved in 1 mL of chloroform (CHCl 3 ), prepared as a solution. Wet the cotton fabric completely in the solution, take it out after 10 minutes and immediately place it in an atmosphere with a humidity of 90%, and obtain a cotton fabric with a porous structure after the solvent and water on the surface of the cotton fabric are completely volatilized. Its contact angle with water is 154.0°.

[0030] see figure 1 , a cotton fabric with a porous structure prepared in this example. This is because the selected solvent of the present invention is easy to volatilize and is immiscible with water. During the film-forming process, the solvent volatilizes quickly to produce a certain temperature gradient, and the sharp drop in the surface temperature of the polymer solution causes the water vapor in the ...

Embodiment 2

[0031] Embodiment 2: a kind of method for preparing hydrophobic cotton fabric

[0032] Prepare hydrophobic cotton fabric with reference to the method of Example 1, the only difference is that the addition amount of the fluorine-containing block copolymer in Example 1 is adjusted, respectively 0.010g, 0.030g, 0.045g, 0.060g, 0.120g, 0.150 g, so that the concentrations of the fluorine-containing block copolymers are 10 mg / mL, 30 mg / mL, 45 mg / mL, 60 mg / mL, 120 mg / mL, and 150 mg / mL, respectively. Other conditions or parameters are consistent with Example 1. The contact angle, strength and air permeability of the prepared cotton fabric are shown in Table 1. This shows that the concentration of the fluorine-containing POSS block copolymer has a great effect on the improvement of the surface hydrophobicity of the cotton fabric, the strength remains basically unchanged and slightly increases, and the air permeability decreases with the increase of the concentration.

[0033] Table 1...

Embodiment 3

[0035] Embodiment 3: a kind of method for preparing hydrophobic cotton fabric

[0036] Prepare hydrophobic cotton fabric with reference to the method of Example 1, the only difference is that the humidity in Example 1 is changed to 50%, 70%, and 100%, and other conditions or parameters are consistent with Example 1. Neither 50% nor 100% humidity can form a regular porous structure. When the humidity is 70%, the contact angle of the cellulose film is 142.6°, the strength is 607N, and the air permeability is 128mm s -1 .

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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Abstract

The invention discloses a method for preparing a hydrophobic textile with a porous surface structure, belonging to the technical field of textile finishing. The method uses a hydrophobic or amphiphilic block copolymer as a film-forming substance, uses volatile trichloromethane or dichloromethane as a solvent, immerses the fabric in the solution for a certain period of time, and then immerses the fabric in a certain concentration and atmospheric humidity. Under these conditions, the surface of the fabric presents a micro-nano porous structure. The concentration of block copolymer, atmospheric humidity, solvent, and type of block copolymer played an important role in the formation of the porous morphology of the fabric surface. The surface morphology of the hydrophobic fabric obtained by the invention is easy to adjust, the hydrophobicity is good, the strength is not affected, and the fabric has potential applications in the fields of self-cleaning, oil-water separation, filter membranes and the like.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic textile with a porous surface structure, belonging to the technical field of textile finishing. Background technique [0002] The hydrophobic material is a bionic design for the structure and function of the surface of the lotus leaf. The contact angle on the surface of the hydrophobic material is greater than 90°, and the contact angle on the surface of the superhydrophobic material is greater than 150°. It is difficult for water droplets to spread or wet on the surface. , automotive interiors, construction and other fields have broad application prospects. The preparation and performance research of superhydrophobic materials has become a research hotspot in the fields of chemistry and materials. In recent years, superhydrophobic textiles with antifouling, self-cleaning, and breathable functions have broad prospects in sportswear, combat uniforms, down jackets, and medical protective clot...

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 Patents(China)
IPC IPC(8): D06M15/657D06M15/233D06M15/263D06M15/53D06M101/06D06M101/10D06M101/12D06M101/32
CPCD06M15/657D06M15/233D06M15/263D06M15/53D06M2200/12D06M2101/06D06M2101/32D06M2101/12D06M2101/10
Inventor 任学宏孔雀栗志广
Owner JIANGNAN UNIV
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