Concave-convex rod enhanced aluminum oxide nanofiber membrane and preparation method thereof

A technology of aluminum oxide nanofiber and nanofiber membranes, which is applied in the direction of heating/cooling fabrics, artificial filaments made of inorganic materials, non-woven fabrics, etc., can solve the problems of low strength of alumina nanofiber membranes, achieve abundant reserves, low cost, The effect of improving rheological properties

Inactive Publication Date: 2020-09-04
明光市铭垚凹凸棒产业科技有限公司 +1
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing an attapulgite-reinforced aluminum oxide nanofiber membrane in order to overcome the defects of the above-mentioned prior art, which solves the problem of low strength of the aluminum oxide nanofiber membrane prepared by electrospinning in the prior art

Method used

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  • Concave-convex rod enhanced aluminum oxide nanofiber membrane and preparation method thereof
  • Concave-convex rod enhanced aluminum oxide nanofiber membrane and preparation method thereof
  • Concave-convex rod enhanced aluminum oxide nanofiber membrane and preparation method thereof

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preparation example Construction

[0031] A method for preparing an attapulgite-reinforced aluminum oxide nanofiber membrane, comprising the following steps:

[0032] Step 1: take a certain amount of inorganic aluminum salt (Al(NO 3 ) 2 .6H 2 O and AlCl 3One or two of them), placed in deionized water, the molar ratio of aluminum salt to deionized water is 1: (10-30), after it dissolves, add glacial acetic acid to adjust the pH value to between 3-5 , and then weigh aluminum isopropoxide or aluminum powder into the solution, the molar ratio of aluminum isopropoxide or aluminum powder to inorganic aluminum salt is (1-3):5, and the solution is heated to 60-100°C under reflux and stirred for 4- 24h, made aluminum sol;

[0033] Step 2: Place the attapulgite in deionized water for ultrasonic treatment for 0.5-4 hours, the mass ratio of the attapulgite to water is 1:(20-200), obtain a dispersed suspension, remove the lower layer of sediment and put it in an oven to dry, according to The mass ratio of the attapulgi...

Embodiment 1

[0039] A method for preparing an attapulgite-reinforced aluminum oxide nanofiber membrane, comprising the following steps:

[0040] Step 1: Weigh 0.05mol of Al(NO 3 ) 2 .9H 2 O, put into 1mol deionized water, after it dissolves, add glacial acetic acid to adjust the pH value to 4, then weigh 0.02mol aluminum isopropoxide and add it to the solution, heat the solution to 80°C and reflux for 4 hours to prepare aluminum sol;

[0041] Step 2: Place the attapulgite in deionized water for 1 hour of ultrasonic treatment. The mass ratio of the attapulgite to water is 1:100 to obtain a dispersed suspension. Remove the lower sediment and put it in an oven to dry. The mass ratio of alumina is added to the attapulgite at a ratio of 1:100 to obtain the attapulgite-doped aluminum sol;

[0042] Step 3: To the attapulgite-doped aluminum sol obtained in step 2, add polyvinylpyrrolidone (K90) according to the mass ratio of the spinning aid to the aluminum oxide in the aluminum sol at a ratio ...

Embodiment 2

[0047] A method for preparing an attapulgite-reinforced aluminum oxide nanofiber membrane, comprising the following steps:

[0048] Step 1: Weigh 0.05mol of Al(NO 3 ) 2 .9H 2 O, put in 1mol deionized water, after it dissolves, add glacial acetic acid to adjust the pH value to 4, then weigh 0.03mol aluminum isopropoxide and add it to the solution, heat the solution to 80°C and reflux for 6 hours to prepare aluminum sol;

[0049] Step 2: Place the attapulgite in deionized water for ultrasonic treatment for 1 hour. The mass ratio of the attapulgite to water is 1:80 to obtain a dispersed suspension. Remove the lower layer of sediment and put it in an oven to dry. The mass ratio of alumina is added to the attapulgite at a ratio of 5:100 to obtain the attapulgite-doped aluminum sol;

[0050] Step 3: To the attapulgite-doped aluminum sol obtained in step 2, add polyvinylpyrrolidone (K90) according to the mass ratio of the spinning aid to the aluminum oxide in the aluminum sol at a...

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Abstract

The invention relates to a concave-convex rod enhanced aluminum oxide nanofiber membrane and a preparation method thereof. Components of the nanofiber membrane comprise concave-convex rods and aluminum oxide with the mass ratio being (1-30):100. The preparation method comprises the steps that inorganic aluminum salt, aluminum isopropoxide and aluminum powder are firstly used for being heated and flowing back under certain conditions of the pH value and temperature to prepare alumina sol, and then the alumina sol is added into the screened concave-convex rods and spinning auxiliaries of a certain proportion to obtain a composite spinning solution; high-pressure electrostatic spinning equipment is used for spinning, and a concave-convex rod enhanced aluminum oxide precursor nanofiber membrane is obtained; and finally through drying and high-temperature heat treatment, the concave-convex rod enhanced aluminum oxide nanofiber membrane is obtained. Compared with existing aluminum oxide nanofiber membranes, the prepared nanofiber membrane is lower in cost and high in productivity and shows more excellent flexibility and higher strength.

Description

technical field [0001] The invention relates to the field of preparation of alumina nanofiber membranes, in particular to an attapulgite reinforced alumina nanofiber membrane and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the improvement of industrial level, the development of functional ceramic fibers has become the development direction of ceramic materials. Alumina fiber has the advantages of light weight, high temperature resistance, corrosion resistance, good thermal stability, low thermal conductivity, and small specific heat, and has a wide range of applications in many fields [Jing Maoxiang, Shen Xiangqian, research status of alumina fiber And development trend [J]. Mining Engineering, 2004 (24) 69-71.]. First of all, as a thermal insulation material, alumina has been widely used as thermal insulation and refractory materials for industrial kilns, thermal insulation materials for high-temperature an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4209D04H1/728D06C7/04D01F9/08
CPCD01F9/08D04H1/4209D04H1/728D06C7/04
Inventor 姜娟倪娜赵晓峰范晓慧郝巍
Owner 明光市铭垚凹凸棒产业科技有限公司
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