Preparation method of surface modified titanium dioxide nano-particle polyimide fiber membrane

A polyimide fiber, titanium dioxide technology, applied in fiber processing, fiber type, textile and papermaking, etc., can solve the problems of limited improvement of wettability, damage of matrix fibers, etc., to achieve controllable thickness, high temperature resistant surface wettability , the effect of low cost

A polyimide fiber, titanium dioxide technology, applied in fiber processing, fiber type, textile and papermaking, etc., can solve the problems of limited improvement of wettability, damage of matrix fibers, etc., to achieve controllable thickness, high temperature resistant surface wettability , the effect of low cost

CN108755104AActive Publication Date: 2018-11-06启鼎技术(北京)有限公司
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  • Preparation method of surface modified titanium dioxide nano-particle polyimide fiber membrane
  • Preparation method of surface modified titanium dioxide nano-particle polyimide fiber membrane
  • Preparation method of surface modified titanium dioxide nano-particle polyimide fiber membrane

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Experimental program
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Effect test

Embodiment 1

[0034]The PMDA / ODA system polyamic acid fiber membrane is prepared, and after treatment and thermal imidization, a polyimide fiber membrane with a surface-modified titanium dioxide nanometer layer is obtained. (1) Weigh 2.0g of pyromellitic dianhydride (PMDA) and 1.8g of 4,4'-diaminodiphenyl ether (ODA) with a molar ratio of 1:1, and dissolve all ODA in 30ml of N,N - in dimethylformamide (DMF) solvent, mechanically stirred, after ODA is all dissolved in DMF, under the condition of ice-water bath, add PMDA step by step, after obtaining the polyamic acid solution with moderate viscosity, after mechanically stirring for 2h, put The polyamic acid solution is put into a 20ml syringe, and the polyamic acid fiber film is prepared by electrospinning technology. The specific parameters of the electrospinning machine are spinning voltage: 20kV; spinning temperature: room temperature; spinning humidity: 20%; Syringe needle diameter: No. 12; Receiving roller speed: 80.0m / min; Receiving di...

Embodiment 2

[0036] The PMDA / ODA system polyamic acid fiber membrane is prepared, and after treatment and thermal imidization, a polyimide fiber membrane with a surface-modified titanium dioxide nanometer layer is obtained. (1) Weigh 2.0g of pyromellitic dianhydride (PMDA) and 1.8g of 4,4'-diaminodiphenyl ether (ODA) with a molar ratio of 1:1, and dissolve all ODA in 30ml of N,N - in dimethylformamide (DMF) solvent, mechanically stirred, after ODA is all dissolved in DMF, under the condition of ice-water bath, add PMDA step by step, after obtaining the polyamic acid solution with moderate viscosity, after mechanically stirring for 2h, put The polyamic acid solution is put into a 20ml syringe, and the polyamic acid fiber film is prepared by electrospinning technology. The specific parameters of the electrospinning machine are spinning voltage: 20kV; spinning temperature: room temperature; spinning humidity: 20%; Syringe needle diameter: No. 12; Receiving roller speed: 80.0m / min; Receiving d...

Embodiment 3

[0038] The PMDA / ODA system polyamic acid fiber membrane is prepared, and after treatment and thermal imidization, a polyimide fiber membrane with a surface-modified titanium dioxide nanometer layer is obtained. (1) Weigh 2.0g of pyromellitic dianhydride (PMDA) and 1.8g of 4,4'-diaminodiphenyl ether (ODA) with a molar ratio of 1:1, and dissolve all ODA in 30ml of N,N - in dimethylformamide (DMF) solvent, mechanically stirred, after ODA is all dissolved in DMF, under the condition of ice-water bath, add PMDA step by step, after obtaining the polyamic acid solution with moderate viscosity, after mechanically stirring for 2h, put The polyamic acid solution is put into a 20ml syringe, and the polyamic acid fiber film is prepared by electrospinning technology. The specific parameters of the electrospinning machine are spinning voltage: 20kV; spinning temperature: room temperature; spinning humidity: 20%; Syringe needle diameter: No. 12; Receiving roller speed: 80.0m / min; Receiving d...

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Abstract

Provided is a preparation method of a surface modified titanium dioxide nano-particle polyimide fiber membrane. Firstly, a polyimide fiber membrane prepared through electrostatic spinning is put in apotassium hydroxide solution for etching, washing is performed to make the membrane neutral, then the polyimide fiber membrane is soaked in a titanium compound water solution for treatment, and finally the surface modified titanium dioxide nano-particle polyimide fiber membrane is prepared through washing, drying and temperature rise thermal imidization treatment. The method is simple to carry out, a basic structures is kept well, the cost is low, the thickness of titanium dioxide nano-particle layer can be controlled within 10 nm, and application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of polyimide fiber membranes, in particular to a method for preparing a surface-modified titanium dioxide nanoparticle polyimide fiber membrane. Background technique [0002] In recent years, with the increasingly prominent environmental problems and the rapid development of new energy vehicles, high-power lithium-ion batteries have become a current research hotspot. Among them, the battery separator, as an important part of the lithium-ion battery, directly affects the overall performance of the lithium-ion battery, especially the safety performance, so the separator is also called the third electrode of the battery. Currently, commercial Li-ion battery separators are mainly polyolefin separators: polyethylene (PE) and polypropylene (PP) separators. Although polyolefin separator has the advantages of good mechanical properties, chemical corrosion resistance and stable battery performance, its disadvantages...

Claims

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Application Information

Patent Timeline
06 Nov 2018
Publication
CN108755104A
IPC
D06M11/46; D04H1/728; D04H1/4334; D06M101/30
CPC
D04H1/4334; D04H1/728; D06M11/46; D06M2101/30
Inventors
齐胜利; 董国庆