Method for preparing forsterite porous superfine fibers by electrostatic spinning

A forsterite and ultrafine fiber technology, which is applied in fiber processing, textile and papermaking, filament/thread forming, etc., to achieve the effects of reducing preparation cost, uniform diameter distribution, and lowering synthesis temperature

Active Publication Date: 2016-09-28
山西阿拉丁新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of forsterite porous ultrafine fibers by electrospinning has not been reported. The purpose of the present invention is to provide a method for preparing forsterite porous ultrafine fibers by electrospinning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Using 0.29g of anhydrous magnesium chloride as a precursor, 0.33ml of tetraethyl orthosilicate as an oxygen donor, and 15ml of anhydrous dichloromethane as a solvent to prepare a reaction solution, put the reaction solution in an oven at 110°C for gelation treatment for 16 hours, Obtain forsterite xerogel. Measure absolute ethanol and polyvinylpyrrolidone (PVP) at 65% and 35% by mass percentage respectively to obtain PVP ethanol solution after mixing, and dissolve the above-mentioned forsterite xerogel with a mass percentage of 5% in a mass percentage of 95% The spinning precursor solution was obtained from the PVP ethanol solution. According to the spinning parameters, the spinning voltage is 15KV, the feeding speed is 0.8ml / h, the solidification distance is 15cm, the needle diameter is 0.8mm, and the forsterite xerogel / PVP composite fiber is prepared at room temperature. Then the composite fiber was calcined at 1000°C at a heating rate of 5°C / min and held for 1 hour ...

Embodiment 2

[0018] 0.29g of anhydrous magnesium chloride as a precursor, 0.33ml of tetraethyl orthosilicate as an oxygen donor, and 15ml of anhydrous dichloromethane as a solvent were used to prepare a reaction solution, and the reaction solution was put into a 130°C oven for gelation treatment for 20 hours. Obtain forsterite xerogel. Measure absolute ethanol and polyvinylpyrrolidone (PVP) at 75% and 25% by mass percentage respectively to obtain a PVP ethanol solution after mixing, and dissolve the above-mentioned forsterite xerogel with a mass percentage of 3% in a mass percentage of 97% The spinning precursor solution was obtained from the PVP ethanol solution. According to the spinning parameters, the spinning voltage is 10KV, the feeding speed is 0.1ml / h, the solidification distance is 5cm, and the needle diameter is 0.8mm. At room temperature, the forsterite xerogel / PVP composite fiber is prepared. Then the composite fiber was calcined at 800°C at a heating rate of 3°C / min and held ...

Embodiment 3

[0020] 0.15g of anhydrous magnesium chloride as a precursor, 0.17ml of tetraethyl orthosilicate as an oxygen donor, and 15ml of anhydrous dichloromethane as a solvent were used to prepare a reaction solution, and the reaction solution was put into a 130°C oven for gelation treatment for 24 hours. Obtain forsterite xerogel. Measure absolute ethanol and polyvinylpyrrolidone (PVP) according to the mass percentage of 80% and 20%, respectively, and mix them to obtain a PVP ethanol solution. Dissolve the above-mentioned forsterite xerogel with a mass percentage of 1% in 99% The spinning precursor solution was obtained from the PVP ethanol solution. According to the spinning parameters, the spinning voltage is 20KV, the feeding speed is 1.5ml / h, the solidification distance is 20cm, the needle diameter is 0.8mm, and the forsterite xerogel / PVP composite fiber is prepared at room temperature. Then the composite fiber was calcined at 800°C at a heating rate of 3°C / min and held for 0.5h ...

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Abstract

The invention relates to a method for preparing forsterite porous superfine fibers by electrostatic spinning, belonging to the technical field of material science. The fiber preparation method comprises the following steps: preparing a reaction liquid from anhydrous magnesium chloride, tetraethoxysilane and anhydrous dichloromethane according to a certain mole ratio, then carrying out gelation treatment on the reaction liquid by heating and triggering non-hydrolytic sol-gel reaction to synthesize forsterite gel; mixing absolute ethyl alcohol with a certain amount of polyvinylpyrrolidone (PVP) according to a certain proportion to obtain a PVP ethanol solution and dissolving the synthesized forsterite gel in the PVP ethanol solution to obtain a spinning precursor solution; preparing the spinning precursor solution into a forsterite xerogel / PVP complex fiber by adopting electrostatic spinning and then carrying out high-temperature calcination, thus obtaining the forsterite porous superfine fibers. The preparation method of the forsterite porous superfine fibers is simple to operate and easy to control, is low in preparation cost and can provide novel high-temperature thermal insulation materials for the fields, such as aviation and the military industry.

Description

technical field [0001] The invention belongs to the field of preparation of forsterite fibers, in particular to a method for preparing forsterite porous ultrafine fibers by electrospinning. Background technique [0002] Forsterite (Mg 2 SiO 4 ) is a silicate mineral with an island structure, which has the characteristics of high strength, high melting point (1980°C), good chemical and mineral stability, and low thermal conductivity (0.8~1.0w / (m·k)). Forsterite fiber also has lower bulk density and thermal conductivity (0.44~0.70w / (m k)), which can be used as a substitute for asbestos under high temperature conditions for a long time, and can also be used to manufacture insulating parts such as electronic tubes and semiconductor devices. Such as small metal-ceramic tubes and transistors vacuum-sealed shells or protective shells. [0003] At present, forsterite fibers are usually prepared by centrifugal spinning and drawing methods. For example, Gao Shengjun uses 80% forste...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D5/00
CPCD01D5/0015D01F9/08
Inventor 魏恒勇崔燚季文玲李慧魏颖娜卜景龙于守武陈越军王鹏王合洋王志发李成
Owner 山西阿拉丁新材料有限公司
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