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Preparation method of high elasticity super hydrophobic high temperature nano silicon dioxide fibrous membrane

A nano-silica, super-hydrophobic technology, used in fiber processing, spinning solution preparation, textile and papermaking, etc., can solve the problems of high temperature resistance and poor flexibility of hydrophobic materials, and achieve low cost, good flexibility, and preparation. simple method effect

Inactive Publication Date: 2009-12-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a highly flexible superhydrophobic high temperature resistant nano-silica fiber membrane to solve the problems of the above-mentioned hydrophobic materials not being resistant to high temperature and poor flexibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 15 g of polyvinyl alcohol solid (average molecular weight: 86,000) into 35 g of deionized water at 60° C., and stir with a magnetic stirrer at a speed of 50 rpm / min for 12 hours to obtain a polyvinyl alcohol solution with a mass fraction of 30%;

[0025] (2) At room temperature, use an analytical balance to weigh 10g, 20g, and 0.1g of tetraethoxysilane, water, and 10mol / L phosphoric acid, and mix tetraethoxysilane with water and 10mol / L phosphoric acid at a ratio of 1:2: The mass ratio is 0.01, and the solids are mixed uniformly with a magnetic stirrer at a speed of 700rpm / min for 6h to obtain a tetraethoxysilane solution;

[0026] (3) At room temperature, weigh 10 g and 5 g of polyvinyl alcohol and tetraethoxysilane solution with an analytical balance respectively, mix the two solutions with a mass ratio of 1:0.5, and mix the two solutions under a magnetic stirrer at a speed of 900 rpm / min Stir for 24h to obtain the electrospinning stock solution;

[0027] (4)...

Embodiment 2

[0031] (1) Add 2.5g of polyvinylpyrrolidone solid (average molecular weight: 58,000) to 47.5g of ethanol with a mass fraction of 95% at 60°C, stir with a magnetic stirrer at a speed of 2500rpm / min for 30h, and obtain a mass fraction of 5% Polyvinylpyrrolidone solution;

[0032] (2) At room temperature, use an analytical balance to weigh 5g, 2.5g, and 0.05g of tetramethoxysilane, water, and 11mol / L sulfuric acid, and mix tetramethoxysilane with water and 11mol / L sulfuric acid at a ratio of 1:0.5 : Mix evenly with a mass ratio of 0.01 and stir for 30 h with a magnetic stirrer at a speed of 50 rpm / min to obtain a tetramethoxysilane solution;

[0033] (3) At room temperature, weigh 5 g and 10 g of polyvinylpyrrolidone and tetramethoxysilane solutions with an analytical balance, and stir for 12 hours with a magnetic stirrer at a speed of 50 rpm / min at a mass ratio of 1:2 to obtain electrospun solution;

[0034] (4) At room temperature, take 5 g of electrospinning solution at a so...

Embodiment 3

[0038] (1) At 60°C, add 6g of polyvinyl acetate (average molecular weight: 50,000) into 44g of tetrahydrofuran, stir with a magnetic stirrer at a speed of 400rpm / min for 16h, and obtain a polyvinyl acetate solution with a mass fraction of 12%. ;

[0039] (2) At normal temperature, use an analytical balance to weigh 5g, 7.5g, and 0.05g of silica nanoparticles, water, and 20mol / L hydrochloric acid with a particle diameter of 50 nanometers, and weigh the silica nanoparticles with a particle diameter of 50 nanometers. Particles, water and 20mol / L hydrochloric acid are mixed in a mass ratio of 1:1.5:0.01, and the solids are evenly mixed and stirred at a speed of 2500rpm / min under a magnetic stirrer for 25h to obtain a silica solution;

[0040] (3) At room temperature, weigh 5g and 5g of polyvinyl acetate and silicon dioxide solution with an analytical balance respectively, mix the two solutions with a mass ratio of 1:1, and stir with a magnetic stirrer at a speed of 2500rpm / min 20...

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Abstract

The invention provides a preparation method of high elasticity super hydrophobic high temperature silicon dioxide fibrous membrane. The invention is characterized in that the method includes the following steps: template polymer is stirred in solvent at 60 DEG C to obtain template solution with mass concentration of 5-30%; organic silicon or nano silicon dioxide are mixed with water and inorganic acid at normal temperature to obtain silicon source solution; the template solution and the silicon source solution are mixed to be uniform at normal temperature to obtain electro spun solution; the electro spun solution is subject to electrostatic spinning at normal temperature to obtain composite fibrous membrane; the compound fibrous membrane is placed into a muffle furnace to be forged, so as to obtain a nano silicon dioxide fibrous membrane; the nano silicon dioxide fibrous membrane is placed into organic silicon hydrocarbon compound solution to be soaked for 6-30h and then is dried in vacuum, thus obtaining the high elasticity super hydrophobic high temperature nano silicon dioxide fibrous membrane. The material is antifouling and self-cleaning under high temperature high pressure severe environment.

Description

technical field [0001] The invention relates to a preparation method of a highly flexible, superhydrophobic and high temperature resistant nano silicon dioxide fiber membrane, which belongs to the technical field of new materials. Background technique [0002] The existing organic and inorganic superhydrophobic nanofibrous membrane materials have the defects of low temperature resistance and poor flexibility. Common organic nanofibrous membrane materials such as polystyrene will deform when the temperature is higher than 100°C, and polyethylene oxide will soften and deform when the temperature is 65°C. It's a lot of inconvenience. Although inorganic nanofibrous membranes such as zinc oxide and aluminum oxide can withstand high temperatures above 400°C, the texture of the fiber membrane is brittle and the flexibility is poor, so it cannot be bent and deformed, and it cannot effectively play a role in the harsh environment of high temperature and high pressure. Antifouling s...

Claims

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Application Information

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IPC IPC(8): D04H3/16D01D5/00D01D1/02D06M13/513
Inventor 丁彬郭孟毛雪俞建勇孙刚
Owner DONGHUA UNIV
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