Fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric

A cellulose fabric, super water-repellent technology, used in fiber processing, plant fibers, textiles and papermaking, etc., can solve problems such as poor production safety, and achieve the effects of low performance requirements, easy industrialization, and excellent water repellency.

Inactive Publication Date: 2009-12-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the solubility, ethanol or methanol must be used as a solvent when preparing the sol, and the production safety is poor.
However, apart from adding silane coupling agents, there is no other way to improve the water-repellent durability of cellulose 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
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  • Fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric
  • Fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare an aqueous solution containing tetraethyl silicate, butane tetracarboxylic acid and sodium hypophosphite, wherein the concentration of tetraethyl silicate in mass percentage is 5%, the mass percentage concentration of butane tetracarboxylic acid is 6%, and the mass percentage of sodium hypophosphite The concentration is 4%; the solution is ultrasonically oscillated for 30 minutes and stirred for 30 minutes to obtain modified SiO 2 sol; cotton gauze card (20 s ×16 s, 128×60) in the above-mentioned finishing solution obtained by dipping and rolling twice, with a liquid loading rate of 80%, pre-bake at 80°C for 3 minutes, and bake at 170°C for 2 minutes.

[0025] Prepare the ethanol solution of 4% cetyltrimethoxysiloxane in the mass percentage of butane tetracarboxylic acid aqueous solution catalytic hydrolysis, soak the fabric obtained in the previous finishing in this solution for 2 hours, and then pre-dry at 80 ° C for 3 minutes, and baked at 170°C for 2 minut...

Embodiment 2

[0031] Prepare an aqueous solution containing tetraethyl silicate, citric acid and sodium hypophosphite, wherein the tetraethyl silicate mass percentage concentration is 4%, the citric acid mass percentage concentration is 6%, and the sodium hypophosphite mass percentage concentration is 4%; The solution was ultrasonically oscillated for 30 minutes and stirred for 30 minutes to obtain modified SiO 2 sol; cotton gauze card (20 s ×16 s , 128×60) in the above-mentioned finishing solution obtained by dipping and rolling twice, with a liquid loading rate of 80%, pre-bake at 80°C for 3 minutes, and bake at 170°C for 2 minutes.

[0032] Prepare the ethanol solution of 5% cetyltrimethoxysiloxane in which the mass percentage of citric acid aqueous solution is catalyzed and hydrolyzed, soak the fabric obtained in the previous finishing in the solution for 2 hours, then pre-dry at 80°C for 3 minutes, °C for 3 minutes to obtain a fluorine-free nano-durable super water-repellent cotton f...

Embodiment 3

[0034] Prepare an aqueous solution containing tetraethyl silicate, polyethylene glycol 400, citric acid, sodium hypophosphite and sodium phosphate, wherein the concentration of tetraethyl silicate is 5% by mass, and the concentration of polyethylene glycol 400 by mass is 2% , the mass percentage concentration of butane tetracarboxylic acid is 6%, the mass percentage concentration of sodium hypophosphite and sodium phosphate is 3%; the solution is ultrasonically oscillated for 30 minutes and stirred for 30 minutes to obtain modified SiO 2 Sol; linen (14 s ×14 s , 54×52) in the above-mentioned finishing solution obtained by dipping and rolling twice, with a liquid-carrying rate of 80%, pre-bake at 80°C for 3 minutes, and bake at 160°C for 2 minutes.

[0035] Prepare a methanol solution of 5% hexadecyltrimethoxysiloxane in which hydrochloric acid aqueous solution is catalyzed and hydrolyzed, and soak the fabric obtained in the previous finishing in the solution for 2 hours, then...

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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PUM

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Abstract

The invention relates to a fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric, which comprises the following steps: (1) preparing hydrous medium solution containing tetra-alkyl ester silicate, polycarboxylic acid and a crosslinked catalyst, oscillating and stirring the hydrous medium solution to obtain SiO2 sol, soaking and rolling the cellulose fabric twice respectively, and curing the cellulose fabric; and (2) preparing non-aqueous solvent solution of alkyl siloxane catalyzed and hydrolyzed by using inorganic acid or organic acid water solution, soaking the cellulose fabric in the solution, and curing the cellulose fabric. The method is simple and safe, has low performance requirement on equipment, is easy for industrialization, and is particularly applicable to the hydrophobicity finishing of the cellulose fabric.

Description

technical field [0001] The invention belongs to the field of super water-repellent finishing of cellulose fabrics, in particular to a fluorine-free nano-durable super water-repellent finishing method of cellulose fabrics. Background technique [0002] Cotton fiber is a kind of hydrophilic natural fiber. Because of its good mechanical properties, comfortable wearing performance and low price, its fabric has always been the most common and popular raw material for clothing. However, in addition to satisfying general civilian functions, textiles also need to have some special functions in industrial, medical and other specific occasions, such as water repellency (hydrophobic) performance is one of them. The research on water-repellent (hydrophobic) cotton fabrics mostly uses substances with low surface energy such as fluoride or silicide to finish the cotton fabrics to achieve the purpose of water repellency. [0003] There are many types of water-repellent (hydrophobic) finis...

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 Applications(China)
IPC IPC(8): D06M11/79D06M13/513D06M15/643D06M101/06
Inventor 邢彦军黄文琦戴瑾瑾
Owner DONGHUA UNIV
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