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A preparation method of carbonized derivatives of high temperature resistant quartz fiber needle felt/phenolic resin composite material

A technology of quartz fiber and phenolic resin, which is applied in the field of preparation of carbonized derivatives of high temperature resistant quartz fiber needle felt/phenolic resin composite material, can solve the problems of fragility, unenvironmental protection, heat resistance and oxygen resistance of raw materials, and achieve high quality The effect of retention rate, macrostructure integrity and uniform pore distribution

Active Publication Date: 2021-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems that the traditional phenolic resin raw materials are not environmentally friendly and the heat and oxygen resistance is poor and easy to break under high temperature conditions, the present invention provides a method for preparing carbonized derivatives of high temperature resistant quartz fiber needle felt / phenolic resin composite materials

Method used

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  • A preparation method of carbonized derivatives of high temperature resistant quartz fiber needle felt/phenolic resin composite material

Examples

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Embodiment 1

[0040] This embodiment provides a method for preparing a carbonized derivative of a high-temperature-resistant quartz fiber needle felt / phenolic resin composite material. The specific steps of the method are as follows:

[0041] Step 1, the preparation of resorcinol-terephthalaldehyde prepolymer solution:

[0042] (1) Weigh resorcinol and terephthalaldehyde according to the molar ratio of 1.5:1, first add resorcinol to ethanol, and fully dissolve it at 35 °C;

[0043](2) Add hydrochloric acid catalyst to the solution system, then add terephthalaldehyde, and perform hydrolysis and polycondensation reaction for 4.5 h under the conditions of 60 °C and magnetic stirring rate of 20 r / s, in which: the reaction system resorcinol and hydroquinone The mass percentage of the total mass of the diformaldehyde reaction monomer in ethanol is 15%; the molar concentration of the hydrochloric acid catalyst is 0.01 mol / L, and the volume ratio of the hydrochloric acid catalyst to ethanol is 1:10...

Embodiment 2

[0069] The difference between this example and Example 1 is: Step 1 (1) The molar ratio of resorcinol to terephthalaldehyde is 1:1.

Embodiment 3

[0071] The difference between this example and example 1 or 2 is that the gel catalyst in step 4 (1) is a hydrochloric acid catalyst.

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Abstract

The invention discloses a method for preparing carbonized derivatives of high-temperature-resistant quartz fiber needle felt / phenolic resin composite material. The method uses resorcinol-terephthalaldehyde resin as a matrix resin, through liquid-phase impregnation-sol-gel Preparation of carbonized derivatives of high temperature resistant quartz fiber needle felt / phenolic resin composites by glue-high temperature carbonization process. The carbonized derivative of the composite material formed by the quartz fiber needle felt / phenolic resin composite material prepared by the high-temperature thermal conversion treatment under nitrogen atmosphere does not appear fragmentation and does not peel off. The carbonized derivative of the quartz fiber needle felt / phenolic resin composite material prepared by the invention has good heat and oxygen resistance, high thermal decomposition temperature, and high mass retention rate under high temperature conditions. The carbonized derivative block material of the quartz fiber needle felt / phenolic resin composite material prepared by the invention has a complete macroscopic structure and a relatively low density.

Description

technical field [0001] The invention relates to a preparation method of a carbonized derivative of a high-temperature-resistant quartz fiber needle felt / phenolic resin composite material. Background technique [0002] Phenolic resin has excellent flame retardancy, high temperature resistance, corrosion resistance and other characteristics. It can be used as high temperature resistant coating, adhesive and composite material matrix, and is widely used in the fields of thermal protection of chemical, aerospace and other devices. However, traditional phenolic resins are severely degraded under thermal oxygen conditions, resulting in low quality retention at high temperatures and are easily broken. At the same time, formaldehyde in traditional phenolic resin synthesis raw materials is a toxic and harmful substance, volatile, and does not conform to the concept of green and sustainable chemical reactions, which has great limitations on the application of phenolic resin at high te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02
CPCC04B30/02C04B14/38
Inventor 徐慧芳徐浩钟正祥
Owner HARBIN INST OF TECH
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