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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: 2009-04-01
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

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 3 ml of ammonia water with a mass concentration of 25 wt % was added to 50 ml of ethanol, stirred at a temperature of 60° C. for 30 min, and the stirring speed was 200 rev / min. Then 5ml of tetraethyl orthosilicate was added dropwise for 10min. Stirring was continued for 90 min at a temperature of 60°C. It was left to stand for 30 minutes to obtain a silica sol. The particle size of the silica sol was measured using a Nano-ZS type nanoparticle size and potential analyzer, and the average particle size was 30.37 nm, and the polydispersity coefficient was 0.226. The cleaned cotton fabric was immersed in the silica sol for 30 min, one dipping and one rolling, and the liquid rate was 60 wt%. Then dry at 60°C for 1 min. Add 3ml of hexadecyl trimethoxysiloxane to 100ml of ethanol, add 3ml of glacial acetic acid and 1ml of deionized water, stir at room temperature for 30min to obtain a hydrolyzed solution, immerse the cotton fabric in the hydrolyzed solution for 30min, dry a...

Embodiment 2

[0019] 6 ml of ammonia water with a mass concentration of 28 wt % was added to 100 ml of ethanol, stirred at a temperature of 70° C. for 60 min, and the stirring speed was 200 rpm. Then 6ml of tetraethyl orthosilicate was added dropwise for 10min. Stirring was continued for 120 min at 70°C. It was left to stand for 80 minutes to obtain a silica sol. The particle size of the silica sol was measured using a Nano-ZS type nanoparticle size and potential analyzer, and the average particle size was 33.80 nm, and the polydispersity coefficient was 0.241. The cotton fabric that has been washed with nonionic surfactant (fatty alcohol polyoxyethylene ether) in advance, the washing condition is 80 ° C, the time is 60 min, and rinsed with clean water is immersed in the silica sol for 10 min, dipped and rolled, with The liquid ratio was 90 wt%. Then dried at 100 °C for 5 min. Add 0.5ml of methyltrimethoxysiloxane and 4ml of hexadecyltrimethoxysiloxane into 100ml of ethanol, add 5ml of ...

Embodiment 3

[0021] 4 ml of ammonia water with a mass concentration of 26 wt % was added to 100 ml of ethanol, stirred at a temperature of 60° C. for 30 min, and the stirring speed was 200 rev / min. Then 6ml of tetraethyl orthosilicate was added dropwise for 10min. Stirring was continued for 120 min at a temperature of 60°C. It was left to stand for 60 minutes to obtain a silica sol. The particle size of the silica sol was measured using a Nano-ZS type nanoparticle size and potential analyzer, and the average particle size was 33.80 nm, and the polydispersity coefficient was 0.241. The cotton fabric that has been washed in advance with a nonionic surfactant (fatty alcohol polyoxyethylene ether), the washing condition is 40 ° C, the time is 20 min, and the cotton fabric rinsed with clean water is immersed in the silica sol for 20 min. The liquid ratio was 80 wt%. Then dried at 80 °C for 3 min. Mix 0.5ml methyltrimethoxysiloxane, 0.5ml vinyltrimethoxysiloxane, 1ml propyltrimethoxysiloxane...

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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 preparation method of a fluorine-free super-hydrophobic cotton fabric, and belongs to the technical field of water-repellent finishing of cotton fabrics. Background technique [0002] The water-repellent finishing of fabrics has a long history. 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 repellency and oil repellency, but also can keep the fabric soft to the touch, air permeability and moisturizing property, so it has been paid much attention by people and has 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 a substitute for fluorine-containing finishing agents and adopting novel finishing tech...

Claims

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Application Information

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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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