Method for covering polyimide nanofiber surface with titanium dioxide nano-layer

A polyimide fiber, titanium dioxide technology, applied in the direction of fiber type, fiber treatment, textile material treatment, etc., can solve the problem of insufficient performance of TiO2, and achieve dense and uniform TiO2 layer, easy conditions and cost. low cost effect

Active Publication Date: 2016-10-26
启鼎技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, using these methods to prepare surface-coated TiO 2 However, there are big deficiencies in the nano-layer polyimide fiber
This is mainly due to TiO 2 Most of the nanoparticles are inside the polyimide matrix fiber, and only a small amount of nanoparticles are attached to the surface of the matrix fiber, resulting in TiO 2 performance is not fully utilized

Method used

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  • Method for covering polyimide nanofiber surface with titanium dioxide nano-layer
  • Method for covering polyimide nanofiber surface with titanium dioxide nano-layer
  • Method for covering polyimide nanofiber surface with titanium dioxide nano-layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The polyamic acid fiber membrane of PMDA / ODA system was prepared, treated, and then thermally imidized to obtain a polyimide fiber membrane coated with titanium dioxide nanometer layer. (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 distance: 20cm. Th...

Embodiment 2

[0030]The polyamic acid fiber membrane of PMDA / ODA system was prepared, treated, and then thermally imidized to obtain a polyimide fiber membrane coated with titanium dioxide nanometer layer. (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 distance: 20cm. The...

Embodiment 3

[0032] The polyamic acid fiber membrane of PMDA / ODA system was prepared, treated, and then thermally imidized to obtain a polyimide fiber membrane coated with titanium dioxide nanometer layer. (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 distance: 20cm. Th...

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Abstract

The invention discloses a method for covering the polyimide nanofiber surface with a titanium dioxide nano-layer. The method comprises steps as follows: firstly, a polyamide acid nanofiber membrane is prepared from a polyamic acid solution with an electrostatic spinning technology; then, the nanofiber membrane is immersed in an aqueous solution of a titanium compound for processing, then washed with water, dried and subjected to thermal imidization at gradient rising temperature, and accordingly, the polyimide nanofiber surface is covered with a titanium dioxide nano-layer, and a polyimide fiber membrane with the surface covered with the titanium dioxide nano-layer is prepared. The method has the advantages that the implementation process is simple, the coating efficiency is high, the cost is low, the thickness of the titanium dioxide nano-layer is adjustable and controllable, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of polyimide fiber membranes, and in particular relates to a method for coating the surface of nanofibers of polyimide nanofiber membranes with a titanium dioxide nanometer layer. Background technique [0002] Polyimide (PI) is one of the materials with the best comprehensive performance in polymer materials at present. It has excellent mechanical properties, good heat resistance, dielectric properties, corrosion resistance, radiation resistance and chemical resistance. sex. Since the 1960s, PI has developed rapidly in many fields such as household appliances, automobile industry, electronic information, aerospace, military equipment, precision machinery, and automation instruments. [0003] Electrospinning is a method of preparing polymer fiber films by using a high-voltage electric field to pull charged polymers. By applying a voltage between the injection device and the receiving device, as the voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M23/00D04H1/4334D04H1/728D06B3/10D06B13/00D06B15/00D06M101/30
CPCD04H1/4334D04H1/728D06B3/10D06B13/00D06B15/00D06M11/46D06M23/00D06M2101/30
Inventor 齐胜利董国庆孔鲁诗田国峰武德珍
Owner 启鼎技术(北京)有限公司
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