Method for preparing floride-free super-hydrophobic cotton fabric

A cotton fabric, super-thinning technology, applied in the field of water-repellent finishing of cotton fabric, can solve the problems of complex preparation process and high preparation temperature, and achieve the effect of wide source of raw materials

Inactive Publication Date: 2011-04-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many methods for preparing superhydrophobic surfaces, the successful examples are all obtained on hard substrates, and the preparation process is complicated and the preparation temperature is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 3ml of ammonia water with a mass concentration of 25wt% into 50ml of ethanol, stir at 60°C for 30min, and the stirring speed is 200 rpm. Then 5ml of tetraethyl orthosilicate was added dropwise for 10 minutes. Stirring was continued for 90 min at 60°C. Stand and age for 30 minutes to obtain a silica sol. The particle size of the silica sol was tested using a Nano-ZS nanometer particle size and potential analyzer, and the average particle size was 30.37 nm, and the polydispersity coefficient was 0.226. Soak the cleaned cotton fabric in the silica sol for 30 minutes, one dipping and one padding, the liquid retention rate is 60wt%. Then dry at 60°C for 1 min. Add 3ml of cetyltrimethoxysiloxane to 100ml of ethanol, add 3ml of glacial acetic acid and 1ml of deionized water, stir at room temperature for 30min to obtain a hydrolyzate, immerse the cotton fabric in the hydrolyzate for 30min, and dry it at room temperature. After drying at 120°C for 30 minutes, a superhydr...

Embodiment 2

[0019] Add 6ml of ammonia water with a mass concentration of 28wt% into 100ml of ethanol, stir at 70°C for 60min, and the stirring speed is 200 rpm. Then 6ml of tetraethyl orthosilicate was added dropwise for 10 minutes. Stirring was continued for 120 min at a temperature of 70°C. Stand and age for 80 minutes to obtain a silica sol. The particle size of the silica sol was tested using a Nano-ZS nanometer particle size and potential analyzer, and the average particle size was 33.80 nm, and the polydispersity coefficient was 0.241. Soak the cotton fabric that has been washed with non-ionic surfactant (fatty alcohol polyoxyethylene ether) in advance at 80°C for 60 minutes and rinsed with clean water in silica sol for 10 minutes. The liquid rate was 90 wt%. Then dry at 100°C for 5 minutes. Add 0.5ml of methyltrimethoxysiloxane and 4ml of hexadecyltrimethoxysiloxane to 100ml of ethanol, add 5ml of glacial acetic acid and 6ml of deionized water, and stir at room temperature for ...

Embodiment 3

[0021] 4ml of ammonia water with a mass concentration of 26wt% was added to 100ml of ethanol, stirred at 60°C for 30min, and the stirring speed was 200 rpm. Then 6ml of tetraethyl orthosilicate was added dropwise for 10 minutes. Stirring was continued for 120 min at 60°C. Stand and age for 60 minutes to obtain a silica sol. The particle size of the silica sol was tested using a Nano-ZS nanometer particle size and potential analyzer, and the average particle size was 33.80 nm, and the polydispersity coefficient was 0.241. Soak the cotton fabric that has been washed with non-ionic surfactant (fatty alcohol polyoxyethylene ether) in advance at 40°C for 20 minutes and rinsed with clean water in silica sol for 20 minutes. The liquid rate was 80 wt%. Then dry at 80°C for 3 minutes. Mix 0.5ml methyltrimethoxysiloxane, 0.5ml vinyltrimethoxysiloxane, 1ml propyltrimethoxysiloxane, 0.5ml octyltrimethoxysiloxane, 0.5ml dodecyl Add trimethoxysiloxane and 3ml hexadecyltrimethoxysiloxan...

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Abstract

The invention provides a preparation method of fluoride-free super-hydrophobic cotton fabrics, pertaining to the technical field of water repellent finishing of cotton fabrics. The preparation method is characterized in that the concrete steps comprise: 3ml to 6ml of ammonia water with a mass concentration of 25wt percent to 28wt percent is added into 50ml to 100ml of ethanol and stirred. 5ml to 6ml of N-tetraethyl silicate is added in a dropwise manner and aged for 30min to 80min to obtain silica sol; the cotton fabric is immersed in the silica sol, dipped and rolled, and then dried at 60 DEG C to 100 DEG C for 1min to 5min; and the cotton fabric is immersed in alkane siloxane hydrolyzate, dried at room temperature and roasted for 30min to 120min in an oven which is preheated to 120 DEG C to 160 DEG C. The preparation method is environmentally-friendly, convenient and effective and meets the requirements of ecotypic textiles; the preparation method has wide sources of raw materials and the contact angle of the prepared cotton fabrics and water dripping exceeds 150 degrees and the prepared cotton fabrics have super-hydrophobic performance and does not influence the physical and mechanical properties of the cotton fabrics.

Description

technical field [0001] The invention relates to a method for preparing a fluorine-free superhydrophobic cotton fabric, belonging to the technical field of water-repellent finishing of cotton fabrics. Background technique [0002] Fabric water-repellent finishing has a long history, and there are many types of water-repellent agents that have been studied or used. The commonly used water-repellent agents are mainly silicone and fluorine-containing compounds. Fluorine-containing water repellent not only has good water and oil repellency, but also can keep the fabric soft, breathable and moisture-retaining, so it has attracted people's attention and been well used. However, fluorine-containing compounds are expensive, have certain ecological problems and cause harm to human health, which affects their further development. Therefore, finding substitutes for fluorine-containing finishing agents and adopting novel finishing techniques have become research hotspots in water-repell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/79D06M13/513D06M15/643D06M101/06
Inventor 高琴文朱泉郭玉良卓文明刘元美孔令红刘玉勇
Owner DONGHUA UNIV
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