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Preparation method of nano silica aerogel aramid composite material

A nano-silica, aramid composite material technology, applied in textiles and papermaking, fiber processing, liquid repellent fibers, etc., can solve the problems of limited application fields, high brittleness, etc., to widen the application field, fracture toughness and tensile strength improvement, the effect of simple continuous molding

Inactive Publication Date: 2018-11-30
东莞市武华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing airgel composite materials are composited with glass fiber, ceramic fiber, carbon fiber, etc., which are brittle and limit their application fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, adding weighed tetraethyl orthosilicate, purified water, and industrial ethanol to a stainless steel reactor, adding a certain proportion of dilute hydrochloric acid for hydrolysis to prepare a silica sol solution, and then adjusting the pH value of the solution with ammonia water To 8.0, a gel mixture is formed. Set up a roll of aramid fiber cloth with a thickness of 0.2mm above and below the material inlet of the airgel aramid composite mold, pass through the upper and lower grooves of the mold, add gel mixture at the mold inlet, and place it at the mold material outlet An aging tank filled with ethanol solvent, a winding machine is installed at the other end of the aging tank to slowly wind the airgel aramid composite material and pull the airgel aramid composite material through the mold and the aging tank, winding The winding speed of the machine ensures that the airgel aramid composite material stays in the aging tank for 4 hours, and the airgel aramid ...

Embodiment 2

[0023] Example 2, adding weighed methyl orthosilicate, purified water, and industrial ethanol to a stainless steel reactor, adding a certain proportion of dilute hydrochloric acid for hydrolysis to prepare a silica sol solution, and then adjusting the pH value of the solution with ammonia water To 10.0, a gel mixture is formed. Set up a roll of aramid fiber cloth with a thickness of 0.2mm above and below the mold material inlet and pass through the upper and lower grooves of the mold, add gel mixture at the mold inlet, and place an aging tank filled with ethanol solvent at the mold material outlet. Install a winder at the other end of the aging tank to slowly wind the airgel-aramid composite material and pull the airgel-aramid composite material through the mold and the aging tank. The winding speed of the winder ensures that the airgel The residence time of the aramid composite material in the aging tank is 12 hours, and the airgel aramid composite material roll of a certain ...

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Abstract

The invention relates to a manufacturing method of an aerogel composite material, and in particular, relates to a preparation method of a nano silica aerogel aramid composite material, wherein the preparation method includes the following steps: (1) preparing a silica sol solution; (2) adding a weak base into the silica sol solution to prepare a gel mixed solution; (3) preparing an aerogel aramidcomposite material die; (4) preparing aramid fiber cloth and a mixed liquid compound gel, erecting rolls of aramid fiber cloth above and below a material inlet of the die respectively, allowing the rolls of aramid fiber cloth to pass through grooves at the upper surface and the lower surface of the die, adding the gel mixed solution at an inlet of the die, placing an aging tank full of an ethanolsolvent at a material outlet of the die, arranging a winder at the other end of the aging tank, slowly winding the aerogel aramid composite material, drawing the aerogel aramid composite material to pass through the die and the aging tank; (5) aging and maturing; (6) carrying out surface modification of high-temperature-resistant hydrophobicity; and (7) slowly vacuumizing, and drying in vacuum atroom temperature.

Description

technical field [0001] The invention relates to a method for manufacturing an airgel composite material, in particular to a method for preparing a nano-silica airgel aramid fiber composite material. Background technique [0002] Aramid fiber has a tensile strength of 3.6 GPa, an elongation modulus of 131 GPa, and a thermal conductivity of 0.048 W / m•K. It is a high-strength and high-toughness material. Nano-silica airgel is a new type of material with a nanoporous network structure. It has a cylindrical multi-branched nanoporous three-dimensional network structure with high permeability, and has a very high porosity (up to 80-99.8%). Low density, high specific surface area, ultra-high pore volume ratio and extremely low thermal conductivity (0.013W / m·K at room temperature), it is the material with the best thermal insulation performance so far. It shows many peculiar properties in fields such as aerospace, petrochemical industry, electric power metallurgy, ship vehicles, pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/79D06M101/36
CPCD06M11/79D06M2101/36D06M2200/12D06M2200/50
Inventor 王长明
Owner 东莞市武华新材料有限公司