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Manufacturing method of flexible titanium dioxide/carbon composite porous nanofiber membrane material

A technology of nanofiber membrane and titanium dioxide, which is applied in fiber processing, filament/thread forming, textiles and papermaking, etc. It can solve the problems of low TiO2 content, easy brittleness of composite fiber materials, and reduced long-term service performance, so as to achieve good flexibility , short calcination time, and the effect of reducing the preparation cost

Pending Publication Date: 2019-01-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above mentioned TiO on the carbon fiber surface 2 The sol-gel method used in the coating makes TiO 2 It only adheres to the surface of carbon fiber, and the adhesion is poor, resulting in a decrease in long-term performance, and TiO 2 The low content limits its wide application
Chinese patent CN105170181A discloses an optimized carbon / TiO 2 However, the composite fiber material prepared by this method is easy to be brittle, which limits its wide application

Method used

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  • Manufacturing method of flexible titanium dioxide/carbon composite porous nanofiber membrane material
  • Manufacturing method of flexible titanium dioxide/carbon composite porous nanofiber membrane material
  • Manufacturing method of flexible titanium dioxide/carbon composite porous nanofiber membrane material

Examples

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Effect test

Embodiment 1

[0041] A controllable preparation method of a flexible titanium dioxide / carbon composite porous nanofiber membrane material, the specific steps are:

[0042] (1) Configure a precursor solution consisting of a titanium source, a high molecular polymer and a solvent: at 25 ° C, the high molecular polymer 3 × 10 -7 mol polyvinylpyrrolidone (Aladdin, molecular weight 1,300,000) and 4×10 -6 mol polyoxyethylene polyoxypropylene ether block copolymer (BASF, molecular weight 10,000) dissolved in solvent 7×10 -3 L was stirred in ethanol / acetic acid with a volume ratio of 4.2:2.6 for 240min, then added 0.06mol isopropyl titanate and stirred for 60min and mixed evenly to obtain a precursor solution;

[0043] (2) Electrospinning the above precursor solution under electrostatic high voltage to obtain the precursor nanofiber film on the receiving device. Control the temperature of the receiving device on the metal drum to 25°C; the parameters of the electrospinning are set as follows: rel...

Embodiment 2

[0046] A controllable preparation method of a flexible titanium dioxide / carbon composite porous nanofiber membrane material, the specific steps are:

[0047] (1) Configure a precursor solution consisting of titanium source, high molecular polymer and solvent: mix high molecular polymer 7×10 at 25°C -7 mol polyvinyl butyral (Aladdin, 170,000~250,000) and 4×10 -6 mol polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (Aladdin, molecular weight 5,500) is dissolved in solvent 7.5×10 -3 L volume ratio is 4.5: 2.4 ethanol / acetic acid and stirs 240min, then adds titanium source 5 * 10 successively -3 mol n-butyl titanate was stirred for 120 minutes and mixed evenly to obtain a precursor solution;

[0048] (2) Electrospinning the above precursor solution under electrostatic high voltage to obtain the precursor nanofiber film on the receiving device. Control the temperature of the receiving device on the metal drum to 25°C; the parameters of the electrospin...

Embodiment 3

[0051] A controllable preparation method of a flexible titanium dioxide / carbon composite porous nanofiber membrane material, the specific steps are:

[0052] (1) Configure a precursor solution consisting of titanium source, high molecular polymer and solvent: mix high molecular polymer 5×10 at 25°C -7 mol polyvinylidene fluoride (Alfa Aisha, molecular weight 570,000) and 2×10 -6 mol polyoxyethylene polyoxypropylene ether block copolymer (BASF, molecular weight 10,000) was dissolved in solvent 3×10 -4 Stir in L of N,N-dimethylformamide for 240min, then add titanium source 4.5×10 -3 mol isopropyl titanate was stirred for 60 minutes and mixed evenly to obtain a precursor solution;

[0053] (2) Electrospinning the above precursor solution under electrostatic high voltage to obtain the precursor nanofiber film on the receiving device. Control the temperature of the receiving device on the metal drum to 25°C; the parameters of the electrospinning are: relative humidity 45%, perfu...

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Abstract

The invention provides the manufacturing method of a flexible titanium dioxide / carbon composite porous nanofiber membrane material. The method comprises the following steps of step1, dissolving a titanium source and a high molecular polymer in an organic solvent to obtain a precursor solution; step2, carrying out electrostatic spinning on the obtained precursor solution under electrostatic high pressure to obtain a precursor nanofiber membrane on a receiving device; and step3, calcining The precursor nanofiber membrane under the protection of an inert gas atmosphere to obtain the flexible titanium dioxide / carbon composite porous nanofiber membrane material. In the invention, an electrostatic spinning technology is simple, there are many spinning raw materials, a calcining temperature for manufacturing the flexible composite porous nanofiber is low, calcining time is short, manufacturing cost is greatly reduced and production efficiency is increased, and a large scale production potential is possessed.

Description

technical field [0001] The invention belongs to the technical field of new material preparation, and in particular relates to a flexible TiO based on an electrospinning process. 2 A controllable preparation method of / C composite porous nanofiber membrane material, which can be used in technical fields such as flexible lithium batteries, optical catalysis, sewage treatment, and air purification. Background technique [0002] TiO 2 It is an excellent semiconductor material and has broad application prospects in energy and environmental protection fields such as lithium-ion batteries, dye-sensitized solar cells, photolytic hydrogen production, air purification, sewage treatment, and self-cleaning. Among them, TiO 2 The application in lithium-ion battery electrodes is mainly through the slurry method of TiO 2 This is achieved by dispersing the particles in the electrode. However, the electrodes prepared by the slurry method have serious defects such as easy particle agglome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00
CPCD01D5/0007D01D5/003D01D5/0061D04H1/728D10B2505/00D10B2505/04
Inventor 闫建华王啸赵云丁彬李光
Owner DONGHUA UNIV
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