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Bio-based silicon carbide ceramic cotton cloth and preparation method thereof

A silicon carbide ceramic, bio-based technology, applied in fabric surface trimming, heating/cooling fabrics, textiles and papermaking, etc., can solve the problems of high price, poor strength, high brittleness, etc., and achieve simple methods, low thermal conductivity, and porosity high rate effect

Pending Publication Date: 2022-02-25
广东盛唐新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at providing a new silicon carbide ceramic cotton cloth for the technical problem that the silicon carbide ceramic cotton cloth in the prior art is relatively brittle, or expensive or has poor strength.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Bio-based silicon carbide ceramic cotton cloth and preparation method thereof
  • Bio-based silicon carbide ceramic cotton cloth and preparation method thereof
  • Bio-based silicon carbide ceramic cotton cloth and preparation method thereof

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with specific embodiments.

[0031] Step S1, put the cleaned and dried biomass fiber cotton cloth into a high-temperature furnace, place it in a corundum crucible, put the crucible into a pyrolysis device, feed an inert gas at a flow rate of 60ssm, and heat it to T1°C at a heating rate of V1 Keep warm for t1 hour, then cool naturally to room temperature, wash the obtained carbon fiber cotton cloth with ethanol to remove adsorbed small organic molecules, dry at 60°C, and cool naturally.

[0032] Step S2, arrange the carbon fiber cotton obtained in step S1 in a corundum crucible, place a silicon source reactant under or around the carbon fiber cotton cloth, and cover the crucible to prevent excessive escape of reactant gas obtained by sublimation or evaporation. Put the corundum crucible together with the lid into a high-temperature furnace, pass in an inert gas with a flow rate of 60ssm, heat it to T2°C...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses bio-based silicon carbide ceramic cotton cloth and a preparation method thereof. The method comprises the following steps that cotton cloth serves as a template, the temperature is slowly increased to the pyrolysis temperature in the inert atmosphere, and then the cotton cloth is pyrolyzed into flexible carbon fiber cotton cloth at the pyrolysis temperature; a silicon source reactant is slowly heated to a gaseous state in the presence of inert gas, and then is subjected to a carbon thermal reaction with the carbon fiber cotton cloth to generate the silicon carbide ceramic cotton cloth. The method is simple, the prepared silicon carbide ceramic cotton cloth is resistant to high temperature, acid and alkali corrosion and oxidation, low in thermal conductivity, small in volume density and extremely high in porosity and has good flexibility and mechanical strength, the method is a novel method for preparing the ceramic cotton cloth, and the problems that an existing flexible ceramic cotton cloth preparation method is complex and high in cost are solved.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, in particular to a bio-based silicon carbide ceramic cotton cloth and a preparation method thereof. Background technique [0002] Silicon carbide is a ceramic material with high strength, high hardness, high temperature resistance, corrosion resistance and low thermal expansion coefficient. The preparation of silicon carbide into low volume density, high specific surface area, high permeability, network structure and flexible material can widely increase the application range of silicon carbide, such as metal fusion filter, catalyst carrier, atomizer filter element, refractory insulation and heat insulation and solar receivers. [0003] At present, the preparation methods of silicon carbide ceramic cotton pad mainly include precursor melt spinning method, precursor electrospinning method and nano one-dimensional material assembly method. The precursor electrospinning method first pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/573D06C7/04
CPCC04B35/62281C04B35/573D06C7/04C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 王凌伟李响朱志强
Owner 广东盛唐新材料技术有限公司
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