Flexible gamma-Al2O3 fiber membrane and preparing method thereof

A fiber membrane and flexible technology, applied in the field of flexible γ-Al2O3 fiber membrane and its preparation, can solve the problems of poor flexibility, poor processability, brittle alumina fiber membrane, etc.

Active Publication Date: 2012-10-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of brittleness, poor flexibility and poor processability of alumina fiber membra...

Method used

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  • Flexible gamma-Al2O3 fiber membrane and preparing method thereof
  • Flexible gamma-Al2O3 fiber membrane and preparing method thereof
  • Flexible gamma-Al2O3 fiber membrane and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of sol-spinning solution: Add 1.207g of aluminum chloride hexahydrate into 3.7mL of deionized water, stir until the aluminum chloride is completely dissolved, and slowly add 2.553g of aluminum isopropoxide and 5.0mL of absolute ethanol at the same time, After stirring for 10 minutes, 0.143 g of tartaric acid was added, and then 1.7 mL of concentrated hydrochloric acid was added to adjust the pH value to 2 to promote the hydrolysis of aluminum isopropoxide. Stir for 8 hours. After the aluminum isopropoxide is completely hydrolyzed, add 0.188 g of polyvinylpyrrolidone (PVP), and stir vigorously until the polyvinylpyrrolidone (PVP) is completely dissolved to obtain a spinnable sol spinning solution.

[0042] (2) Electrospinning: inject the sol-spinning solution prepared in step (1) into the electrospinning device, the spraying speed of the sol-spinning solution is 1.9mL / h, the voltage is 20kV, and the spinning receiving distance is 23cm , the spinning humid...

Embodiment 2

[0046] (1) Preparation of sol-spinning solution: as described in Example 1, the difference is that the amount of polyvinylpyrrolidone (PVP) added is 0.242 g.

[0047] (2) Electrospinning: Same as Example 1.

[0048] (3) Calcination of fibers: as described in Example 1, the difference is that the heat preservation time of 800°C is 120min to obtain γ-Al 2 o 3 Fiber membrane.

[0049] The resulting flexible γ-Al 2 o 3 The thickness of the fiber film is 10~100μm, the fiber diameter is 170~330nm, the γ-Al of the fiber 2 o 3 The particle size is 8-20nm, the surface of the fiber is smooth and dense, and the fiber membrane shows good flexibility.

Embodiment 3

[0051] (1) Preparation of sol spinning solution: add 0.966g aluminum chloride hexahydrate into 2.8mL deionized water, stir until the aluminum chloride is completely dissolved, and slowly add 0.817g aluminum isopropoxide and 5.0mL absolute ethanol at the same time, After stirring for 10 minutes, 0.143 g of tartaric acid was added, and then 0.5 mL of concentrated hydrochloric acid was added to adjust the pH value to 2 to promote the hydrolysis of aluminum isopropoxide. Stir for 6 hours. After the aluminum isopropoxide is completely hydrolyzed, add 0.168 g of polyvinylpyrrolidone (PVP), and stir vigorously until the polyvinylpyrrolidone (PVP) is completely dissolved to obtain a spinnable sol spinning solution.

[0052] (2) Electrospinning: Same as Example 1.

[0053] (3) Calcination of fibers: same as in Example 1.

[0054] The resulting flexible γ-Al 2 o 3 The thickness of the fiber film is 10~100μm, the fiber diameter is 70~220nm, the γ-Al of the fiber 2 o 3 The particle s...

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Abstract

The invention relates to a flexible gamma-Al2O3 fiber membrane and a preparing method thereof. The flexible gamma-Al2O3 fiber membrane is formed by gamma-Al2O3 fibers and has the thickness ranging from 10 to 100 micros, the diameter of the fibers forming the fiber membrane ranges from 70 to 400 nanometers, and the particle size of the Al2O3 particles forming the fibers ranges from 8 to 40 nanometers. Aluminium chloride, aluminum isopropoxide, anhydrous ethanol, tartaric acid and polyvinyl pyrrolidone are prepared into sol spinning solution through the combination of the sol-gel method and the electrospinning technique, so as to make aluminium chloride gel fiber membrane and then make the gamma-Al2O3 fiber membrane by calcining the gel fiber membrane. The aluminium chloride fiber membrane has high flexibility, little possibility of being broken, excellent mechanical property and strong machinability, and can serve as the high-temperature catalyst material, the high-temperature thermal insulation material as well as the high-temperature filtering material. The flexible gamma-Al2O3 fiber membrane has simple process equipment and strong machinability, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a flexible γ-Al 2 o 3 The fiber membrane and its preparation method belong to the technical field of inorganic non-metallic materials. Background technique [0002] As a new type of separation medium, compared with organic separation membranes, inorganic separation membranes have many excellent characteristics such as good chemical stability, acid resistance, alkali resistance, and organic solvent resistance; strong antimicrobial ability; high temperature resistance, etc., in many fields It has applications, especially in high temperature, high pressure and strong acid and strong alkali systems such as petrochemical and chemical industries, showing properties that organic membranes do not have. The excellent anti-microbial erosion ability of inorganic membranes has broad application prospects in the fields of biochemical and pharmaceutical industries. In the environmental field, such as oily wastewater treatment, high-temper...

Claims

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Application Information

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IPC IPC(8): D04H1/4209D04H1/728D01D1/02D01D5/00D06C7/04B01D71/02B01D67/00
Inventor 陈代荣赵晓敏焦秀玲
Owner SHANDONG UNIV
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