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Preparation method for nano composite porous netty superhydrophobic textile

A nano-composite and textile technology, applied in textiles and papermaking, liquid-repellent fibers, fiber treatment, etc., can solve problems such as poor mechanical properties, brittle and brittle limitations, etc., achieve excellent super-hydrophobic performance, reduce fabric The effect of surface free energy and excellent superhydrophobicity

Inactive Publication Date: 2017-12-26
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, three-dimensional porous SiO used to construct superhydrophobic surfaces 2 Aerogels, whose fine and brittle porous structure leads to poor mechanical properties, this brittleness is greatly limited in application
The research results reported so far mainly focus on bulk superhydrophobic SiO 2 However, there are few reports on the preparation of superhydrophobic surfaces by using pulverized airgel particles, especially organic-inorganic hybrid polymer-reinforced nanocomposite airgel particles.

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

[0023] Mix methyltrimethoxysilane with methanol (the molar ratio of methyltrimethoxysilane to methanol is 1:16), water (the molar ratio of methyltrimethoxysilane to water is 1:10), and add acid Catalyst oxalic acid (oxalic acid concentration 0.02mol / L), carry out sol-gel reaction, adjust the reaction temperature to 30°C, stir for 2 hours, then add ammonia solution dropwise to adjust the pH to 7, stir vigorously for 10 minutes and put it in a constant temperature water bath at 30°C Let it gel in the pan. After the gel is formed, it is aged for 24 hours, then isopropanol and n-hexane (volume ratio of isopropanol and n-hexane is 1:1) are added for solvent replacement for 8 hours, and then dried at 70°C under normal pressure for 20 hours, and then dried at 70°C for 20 hours. SiO 2 airgel. SiO 2 Airgel pulverization, 2% pulverized SiO 2 Airgel is mixed with 8% polydimethylhydroxysiloxane and its crosslinking agent γ-glycidyl etheroxypropyl trimethoxysilane (0.8%) in 50 mL of te...

Embodiment 2

[0026] Mix methyltrimethoxysilane with methanol (the molar ratio of methyltrimethoxysilane to methanol is 1:24), water (the molar ratio of methyltrimethoxysilane to water is 1:12), and add acid Catalyst oxalic acid (oxalic acid concentration 0.01mol / L), carry out sol-gel reaction, adjust the reaction temperature to 40°C, stir for 3 hours, then add ammonia solution dropwise to adjust the pH to 8, stir vigorously for 10 minutes and put it in a constant temperature water bath at 40°C Let it gel in the pot. After the gel was formed, it was aged for 28 hours, and then added isopropanol and n-hexane (volume ratio of isopropanol and n-hexane was 1:2) for solvent replacement for 6 hours, and then dried at 60°C under normal pressure for 24 hours, and then dried at 60°C for 24 hours. SiO 2 airgel. SiO 2 Airgel pulverization, the 3% SiO 2 Airgel particles were mixed with 6% polydimethylhydroxysiloxane and its crosslinking agent γ-glycidyl etheroxypropyl trimethoxysilane (0.6%) in 50 ...

Embodiment 3

[0029] Mix methyltrimethoxysilane with methanol (the molar ratio of methyltrimethoxysilane to methanol is 1:24), water (the molar ratio of methyltrimethoxysilane to water is 1:8), and add acid Catalyst oxalic acid (oxalic acid concentration 0.01mol / L), carry out sol-gel reaction, adjust the reaction temperature to 50°C, stir for 2 hours, then add ammonia solution dropwise to adjust the pH to 8, stir vigorously for 20 minutes and put it in a constant temperature water bath at 50°C Let it gel in the pan. After the gel is formed, it is aged for 30 hours, then isopropanol and n-hexane (volume ratio of isopropanol and n-hexane: 1:1) are added for solvent replacement for 10 hours, and then dried at 50°C under normal pressure for 30 hours, and then dried at 50°C for 30 hours. SiO 2 airgel. SiO 2 Airgel pulverization, the 5% SiO 2 Airgel particles are mixed with 5% epoxypropyl polysiloxane and its crosslinking agent γ-glycidyl etheroxypropyl trimethoxysilane (0.5%) in 50mL of tetr...

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Abstract

The invention relates to a preparation method for a nano composite porous netty superhydrophobic textile; with adopting of a sol-gel method, a three-dimensional porous SiO2 aerogel is prepared through acid-base two-step catalysis, aging, solvent replacement and atmospheric drying; the SiO2 aerogel is mixed with polysiloxane to prepare a polysiloxane / SiO2 aerogel nanocomposite material; a textile is finished with the polysiloxane / SiO2 aerogel nanocomposite material by a one-step method; through cooperation of the characteristic of low surface energy of polysiloxane and a three-dimensional network nanoporous micro rough structure of the SiO2 aerogel, and combination of the crosslinked adhesion effect between polysiloxane and aerogel particles and the crosslinked adhesion effect between the aerogel particles and the textile, the durable nano composite porous netty superhydrophobic textile is obtained. The preparation method is different from a method for constructing a superhydrophobic textile through close packed arraying structure of nanoparticles, the preparation process is simple, the superhydrophobic property is excellent, stable and durable, and the product is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of functional finishing of textiles, and in particular relates to a preparation method of nanocomposite porous net-like superhydrophobic textiles. Background technique [0002] A superhydrophobic surface refers to a surface with a contact angle with water greater than 150°. The superhydrophobic surface based on fiber materials has attracted more and more scholars' attention because of its soft matrix, controllable method and wide application range. With the rapid development of science and technology, superhydrophobic functional textiles are increasingly concerned and loved by people because of their unique properties such as anti-fouling and easy cleaning, as well as the excellent properties of textile materials such as flexibility, breathability and light weight, and can be widely used in industries. Production, medical, military and daily life, such as sports and leisure fabrics, living umbrellas, advertising bann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M15/65D06M11/79D06M13/513D06M101/06D06M101/12
CPCD06M11/79D06M13/513D06M15/643D06M15/65D06M2101/06D06M2101/12D06M2200/12
Inventor 徐丽慧张旋宇沈勇王黎明丁颖盛宇
Owner SHANGHAI UNIV OF ENG SCI
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