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Preparation method of flexible silicon dioxide fiber film

A technology of silica and fiber membranes, applied in fiber treatment, fiber chemical characteristics, textiles and papermaking, etc., can solve problems such as resistance to organic solvents, poor flexibility, high temperature resistance of ordinary fiber membranes, etc., to achieve good flexibility, Good high temperature resistance, simple and feasible preparation method

Inactive Publication Date: 2014-02-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for preparing a flexible silica fiber membrane to solve the problems of ordinary fiber membranes such as poor resistance to high temperature, resistance to organic solvents, poor flexibility at high temperature, etc.

Method used

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  • Preparation method of flexible silicon dioxide fiber film
  • Preparation method of flexible silicon dioxide fiber film
  • Preparation method of flexible silicon dioxide fiber film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) At room temperature, use an analytical balance to weigh 10g, 10g, and 0.1g of tetraethyl orthosilicate, ultrapure water, and phosphoric acid, and mix ethyl orthosilicate and ultrapure water at a ratio of 1:1 while stirring Add phosphoric acid dropwise, and stir magnetically for 4 hours until a clear and transparent silicon source solution is obtained;

[0028] (2) Dissolve 1 g of polyvinyl alcohol (polymerization degree 1700, alcoholysis degree 50%) in 11.5 g of ultrapure water, heat and stir in an oil bath at 80°C for 5 hours, and obtain a polyvinyl alcohol solution with a mass fraction of 8%. ;

[0029] (3) At room temperature, use an analytical balance to weigh 6g each of the silicon source solution and the polyvinyl alcohol solution, stir magnetically for 4 hours until a clear and transparent spinning solution is obtained, and let it stand for 40 hours; extract the above spinning solution with a disposable syringe, The electrospinning conditions are micropump p...

Embodiment 2

[0033] (1) At room temperature, use an analytical balance to weigh 10g, 12g, and 0.1g of ethyl orthosilicate, ultrapure water, and phosphoric acid, and mix ethyl orthosilicate and ultrapure water at a ratio of 1:1.2 while stirring Add phosphoric acid dropwise, and stir magnetically for 5 hours until a clear and transparent silicon source solution is obtained;

[0034] (2) Dissolve 1 g of polyvinyl alcohol (polymerization degree 1700, alcoholysis degree 50%) in 10.1 g of ultrapure water, heat and stir in an oil bath at 85°C for 4.5 hours to obtain polyvinyl alcohol with a mass fraction of 9% solution;

[0035] (3) At room temperature, use an analytical balance to weigh 6g and 6.6g of the silicon source solution and the polyvinyl alcohol solution, stir magnetically for 4 hours until a clear and transparent spinning solution is obtained, and let it stand for 40 hours; draw 5ml of the above-mentioned solution with a disposable syringe Spinning solution, electrospinning conditions...

Embodiment 3

[0038] (1) At room temperature, use an analytical balance to weigh 10g, 15g, and 0.1g of tetraethyl orthosilicate, ultrapure water, and phosphoric acid, and mix ethyl orthosilicate and ultrapure water at a ratio of 1:1.5 while stirring Add phosphoric acid drop by drop, and magnetically stir for 6 hours until a clear and transparent silicon source solution is obtained;

[0039] (2) Dissolve 1 g of polyvinyl alcohol (polymerization degree 1700, alcoholysis degree 50%) in 9 g of ultrapure water, heat and stir in an oil bath at 90°C for 4 hours to obtain a polyvinyl alcohol solution with a mass fraction of 10%;

[0040] (3) At room temperature, use an analytical balance to weigh 6g and 7.2g of the silicon source solution and the polyvinyl alcohol solution, stir magnetically for 5 hours until a clear and transparent spinning solution is obtained, and let it stand for 40 hours; use a disposable syringe to draw 5ml of the above Spinning liquid, the condition of electrospinning is mic...

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Abstract

The invention relates to a preparation method of a flexible silicon dioxide fiber film. The method includes: (1) mixing tetraethyl orthosilicate, ultrapure water and phosphoric acid at room temperature to obtain a transparent and clear silicon source solution; (2) dissolving polyvinyl alcohol in the ultrapure water with stirring at the temperature of 80-90 DEG C for 4-5 hours to obtain a polyvinyl alcohol solution; (3) mixing the silicon source solution with the polyvinyl alcohol solution to obtain a colorless clear spinning solution, standing and ageing prior to electrostatic spinning, and collecting a layer of uniform white fiber film; (4) putting the white fiber film in a muffle furnace, heating to 500 DEG C prior to retaining the temperature for 2-4 hours, then heating to 800 DEG C prior to retaining the temperature for 2-3 hours, and finally naturally cooling to obtain the flexible silicon dioxide fiber film. The preparation method is simple, and the prepared silicon dioxide fiber film is resistant to organic solvents and corrosion, has good flexibility after being subjected to high temperature and has potential application in the fields of catalyst loading and fluorescent films.

Description

technical field [0001] The invention belongs to the field of silicon dioxide nanometer materials, in particular to a method for preparing a flexible silicon dioxide fiber membrane. Background technique [0002] Due to its special structure, one-dimensional nanocomposites have different photoelectric, physical and chemical properties from bulk materials, and have great basic research value and potential application value. [0003] In recent years, a variety of one-dimensional nanocomposites have been prepared by electrospinning combined with sol-gel technology. Meng Yuezhong and others dissolved soluble proton exchange resins and water-insoluble polymers to obtain electrospinning solutions. After silk modification, the non-water-soluble high molecular polymer is dissolved, diffused and filled into the gaps of the fiber membrane, and the method of preparing a composite proton exchange membrane (Chinese patent "A Composite Proton Exchange Membrane and Its Preparation Method", ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4209D04H1/728D01D5/00D01F9/00
Inventor 王宏志张书娴李耀刚张青红
Owner DONGHUA UNIV
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