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Silicon dioxide-polymethyl methacrylate composite thermal insulation material and preparation method thereof

A technology of polymethyl methacrylate and composite thermal insulation material, which is applied in the field of green building materials and can solve the problems of unachieved thermal insulation methods and the like

Inactive Publication Date: 2018-04-03
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have not fundamentally solved the problem of heat dissipation of transparent enclosure structures, or the thermal insulation methods of these glass components are far from meeting our expectations

Method used

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  • Silicon dioxide-polymethyl methacrylate composite thermal insulation material and preparation method thereof
  • Silicon dioxide-polymethyl methacrylate composite thermal insulation material and preparation method thereof
  • Silicon dioxide-polymethyl methacrylate composite thermal insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 0.5g of 12mol / L hydrochloric acid to 90g of tetraethyl orthosilicate, stir at room temperature for 22min and let it stand for 120min, then add 0.07g of sodium hydroxide, stir until it is completely dissolved, and leave the above solution for 5h to obtain a wet gel. Add 100g of methyl methacrylate, remove the supernatant after soaking for 16 hours, repeat the soaking process twice, add 0.1g of dibenzoyl peroxide, and heat up to the temperature above the initiation temperature to initiate polymerization after ultrasonic dispersion. After standing for 5 h, the product was placed in CO 2 In a supercritical high-pressure extraction device, CO 2 The medium is subjected to supercritical drying at a temperature of 45°C and an air pressure of 7.2MPa for 13 hours to obtain a silica-polymethyl methacrylate composite insulation material.

Embodiment 2

[0021] Add 1g12mol / L hydrochloric acid to 95g tetraethyl orthosilicate, stir at room temperature for 5min and then let it stand for 170min, then add 0.14g of sodium hydroxide, stir until it is completely dissolved, and leave the above solution for 2.5h to obtain a wet gel. Add 100g of methyl methacrylate, remove the supernatant after soaking for 24 hours, repeat the soaking process 3 times, add 0.17g of dibenzoyl peroxide, and heat up to the temperature above the initiation temperature to initiate polymerization after ultrasonic dispersion. After standing for 5 h, the product was placed in CO 2 In a supercritical high-pressure extraction device, CO 2 The medium is subjected to supercritical drying at a temperature of 50°C and an air pressure of 10 MPa for 10 hours to obtain a silica-polymethyl methacrylate composite insulation material.

Embodiment 3

[0023]Add 0.7g of 12mol / L hydrochloric acid to 110g of ethyl orthosilicate, stir at room temperature for 23min and then let it stand for 90min, then add 0.13g of sodium hydroxide, stir until it is completely dissolved, and leave the above solution for 2.7h to obtain a wet gel. Add 100g of methyl methacrylate into it, remove the supernatant after soaking for 12.5h, repeat the soaking process twice, add 0.12g of dibenzoyl peroxide, ultrasonically disperse evenly, and raise the temperature above the initiation temperature to initiate polymerization , after standing for 6h, the product was placed in CO 2 In a supercritical high-pressure extraction device, CO 2 The medium is subjected to supercritical drying at a temperature of 34°C and an air pressure of 7 MPa for 20 hours to obtain a silica-polymethyl methacrylate composite insulation material.

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Abstract

The invention discloses a silicon dioxide-polymethyl methacrylate composite thermal insulation material and a preparation method thereof. A small molecule precursor of silicon dioxide aerogel and a monomer of polymethyl methacrylate are adopted as raw materials, and mixing is carried out under a small molecular state in a liquid-phase environment, so that the preparation of the composite thermal insulation material with a uniform three-dimensional network structure is realized through respective reactions of the mixture and a co-supercritical technology. The prepared aerogel material has the uniform three-dimensional network structure, high thermal insulation performance and phase-interface thermal resistance, and has excellent thermal insulation performance.

Description

technical field [0001] The invention belongs to the technical field of green building materials, and in particular relates to a silica-polymethyl methacrylate composite thermal insulation material and a preparation method thereof. Background technique [0002] The heat loss of the transparent envelope accounts for a large proportion of the building's energy consumption, largely due to the low thermal insulation of the glass elements of the building. Especially at the moment when environmental and energy problems are becoming more and more serious, improving the thermal insulation level of building transparent envelopes and striving to promote building energy conservation have profound implications for improving building thermal environment, reducing environmental pollution, and protecting earth resources and ecological environment. significance. In fact, people have long realized the problem of large heat dissipation of building transparent envelopes, and proposed some meth...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/14C08F6/00
CPCC08F6/00C08F292/00C08F220/14Y02P20/54
Inventor 李洪彦刘洪丽宋礼猛魏玉峰李如意付永强
Owner TIANJIN CHENGJIAN UNIV
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