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A flexible ordered mesoporous tio 2 Nanofiber membrane and preparation method thereof

A nanofiber membrane and mesoporous technology, which is applied in the direction of heating/cooling fabrics, textiles and papermaking, artificial filaments made of inorganic materials, etc., can solve the problems of disordered fiber mesopore structure, wide pore size distribution, complex process, etc., to achieve Effects of reducing micro-defects on the fiber surface, inhibiting grain size growth, and promoting diffusion migration

Active Publication Date: 2020-05-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of complex process, poor flexibility, wide pore size distribution, small specific surface area and disordered arrangement of fiber mesopore structure in the prior art, and provide a simple process, low cost, good flexibility, Flexible ordered mesoporous TiO with narrow pore size distribution, large specific surface area and orderly arrangement of fiber mesoporous structure 2 Nanofiber membrane and preparation method thereof

Method used

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  • A flexible ordered mesoporous tio <sub>2</sub> Nanofiber membrane and preparation method thereof
  • A flexible ordered mesoporous tio <sub>2</sub> Nanofiber membrane and preparation method thereof
  • A flexible ordered mesoporous tio <sub>2</sub> Nanofiber membrane and preparation method thereof

Examples

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Embodiment 1

[0035] A flexible ordered mesoporous TiO 2 The preparation method of nanofibrous film, the steps are as follows:

[0036] (1) Dissolve the titanium source titanium isopropoxide and heat stabilizer ethyl orthosilicate in the solvent ethanol and stir for 30 minutes, then add the coupling agent N-(β-aminoethyl)-γ-aminopropylmethyl in sequence Dimethoxysilane and non-ionic surfactant polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer were stirred for 10 min and mixed uniformly to obtain a precursor solution, wherein in the solution, titanium source, heat stable The molar ratio of agent, solvent, coupling agent and nonionic surfactant is 1:0.25:50:0.25:0.2;

[0037] (2) Prepare the precursor fiber film by electrospinning the above precursor solution, apply a constant temperature thermal field of 40°C in the spinning interval during electrospinning and control the temperature of the metal drum receiving device to 0°C; The parameters are: relative humidity...

Embodiment 2

[0044] A flexible ordered mesoporous TiO 2 The preparation method of nanofibrous film, the steps are as follows:

[0045] (1) Dissolve titanium source tetrabutyl titanate and heat stabilizer zirconium oxychloride in solvent ethanol and stir for 150 minutes, then add coupling agent γ-aminopropyltrimethoxysilane and nonionic surfactant polyoxygen Ethylene polyoxypropylene was stirred for 90 minutes and mixed evenly to prepare a precursor solution, wherein the molar ratio of titanium source, heat stabilizer, solvent, coupling agent and nonionic surfactant in the solution was 1:0.01:20:0.05:0.005;

[0046] (2) Prepare the precursor fiber film by electrospinning the above precursor solution, apply a constant temperature thermal field of 90°C in the spinning interval during electrospinning and control the temperature of the metal plate receiving device to -10°C; The parameters of silk are: relative humidity 70%, perfusion speed 0.1mL / h, voltage 40kV, distance between receiving devi...

Embodiment 3

[0050] A flexible ordered mesoporous TiO 2 The preparation method of nanofibrous film, the steps are as follows:

[0051] (1) Dissolve the titanium source titanium trichloride and the heat stabilizer cerium sulfate tetrahydrate in the solvent acetic acid and stir for 90 minutes, then add the coupling agent methyltrimethoxysilane and the nonionic surfactant glycerol polyoxyethylene in sequence The polyoxypropylene block copolymer was stirred for 50 minutes and mixed evenly to prepare a precursor solution, wherein the molar ratio of titanium source, heat stabilizer, solvent, coupling agent and nonionic surfactant in the solution was 1:0.13:35:0.15 :0.1;

[0052] (2) Prepare the precursor fiber film by electrospinning the above precursor solution, apply a constant temperature thermal field of 65°C in the spinning interval during electrospinning and control the temperature of the metal drum receiving device to -5°C; The parameters of silk are: relative humidity 45%, perfusion sp...

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Abstract

The invention relates to a flexible ordered mesopore TiO2 nanofiber membrane and a preparing method thereof. The preparing method comprises the following steps that firstly a precursor solution is prepared, wherein the precursor is composed of a titanium source, a heat stabilizer, a coupling agent, a non-ionic surface active agent and a solvent; then electrostatic spinning is conducted to obtain a precursor fibrous membrane, during electrostatic spinning, a constant temperature thermal field of 40-90 DEG C is applied to the spinning range, and the temperature of a receiving device is controlled at -10 to 0 DEG C; finally calcination is conducted under an air atmosphere to obtain the flexible ordered mesopore TiO2 nanofiber membrane. Catalyzing activity loci in a final product can be uniformly scattered, and the problems of a fiber type TiO2 photocatalysis material which exists in the prior art that the mesopore that the mesopore diameter is small, the distribution is not uniform, the ordered mesopore is complex in preparing technology, the specific surface area is small, the content of TiO2 is small, and the brittleness is large; the photocatalysis activity of the material is effectively improved, and the prepared TiO2 nanofiber membrane has a wide application prospect in the field of photocatalysis.

Description

technical field [0001] The invention belongs to the field of new materials and relates to a flexible and ordered mesoporous TiO 2 Preparation method of nanofibrous membrane. Background technique [0002] As an environmentally friendly environmental catalytic purification technology, photocatalytic technology has broad application prospects in the field of environmental governance. Among many photocatalytic materials, titanium dioxide has become a research hotspot due to its stable chemical properties and abundant reserves. Researchers have improved the photocatalytic performance of titanium dioxide through various methods such as metal element doping, non-metal element doping, noble metal deposition, and p-n structure construction. In recent years, mesoporous materials have shown great application potential in the fields of chemistry, environmental science, optoelectronics, electromagnetics, materials science and separation science due to their high specific surface area a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/005D04H3/03D06C7/00D01F9/08
CPCD01F9/08D04H3/005D04H3/03D06C7/00
Inventor 丁彬宋骏武晓会卢绪燕俞建勇
Owner DONGHUA UNIV
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