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Flat-plate solar collector heat insulation material and preparation method thereof

A flat-panel solar thermal insulation material technology, applied in the field of flat solar thermal collector thermal insulation materials and its preparation, can solve the problems of non-extensible water absorption, backward production technology, slightly poor thermal insulation performance, etc., and achieve wide working temperature range, resin The effect of high molecular weight and increased toughness

Inactive Publication Date: 2018-03-13
NANNING KEYU ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phenolic board produced abroad has good thermal insulation performance, but the current domestic promotion efforts are small, and the production technology is relatively backward, and its thermal insulation performance is slightly worse than that of foreign products.
Domestically produced phenolic boards have weaknesses such as easy pulverization, low mechanical strength, brittleness, no extensibility and high water absorption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A flat-plate solar thermal collector insulation material, made of the following raw materials in parts by weight: 80 parts of phenolic resin; 12 parts of lignin; 6 parts of lignosulfonate; 7 parts of expandable graphite; 9 parts of foaming agent; 18 parts of curing agent; 4 parts of stabilizer; 1 part of catalyst; 20 parts of water.

[0024] The phenolic resin is a basic phenolic resin, and its preparation method is: using sodium hydroxide and ammonia water as a catalyst, phenol, lignin, formaldehyde and organic compounds containing amino groups are prepared by polycondensation and dehydration, and the obtained molecular weight is 600-600. 1000 basic phenolic resin.

[0025] The lignosulfonate is sodium lignosulfonate.

[0026] The preparation method of the expandable graphite is as follows: using 50-mesh high-carbon flake graphite, concentrated sulfuric acid, potassium dichromate and hydrogen peroxide as raw materials, stirring continuously for 40 minutes at 35 ° C, a...

Embodiment 2

[0030] A kind of thermal insulation material for a flat solar heat collector, made of the following raw materials in parts by weight: 85 parts of phenolic resin; 15 parts of lignin; 8 parts of lignosulfonate; 6 parts of expandable graphite; 10 parts of foaming agent; 18 parts of curing agent; 5 parts of stabilizer; 1.2 parts of catalyst; 30 parts of water.

[0031] The phenolic resin is a basic phenolic resin, and its preparation method is: using sodium hydroxide and ammonia water as a catalyst, phenol, lignin, formaldehyde and organic compounds containing amino groups are prepared by polycondensation and dehydration, and the obtained molecular weight is 600-600. 1000 basic phenolic resin.

[0032] The lignosulfonate is sodium lignosulfonate and calcium lignosulfonate.

[0033] The preparation method of the expandable graphite is as follows: using 50-mesh high-carbon flake graphite, concentrated sulfuric acid, potassium dichromate and hydrogen peroxide as raw materials, stirr...

Embodiment 3

[0037] A flat-plate solar collector thermal insulation material, made of the following raw materials in parts by weight: 90 parts of phenolic resin; 10 parts of lignin; 6 parts of lignosulfonate; 5 parts of expandable graphite; 10 parts of foaming agent; 18 parts of curing agent; 5 parts of stabilizer; 1 part of catalyst; 20 parts of water.

[0038] The phenolic resin is a basic phenolic resin, and its preparation method is: using sodium hydroxide and ammonia water as a catalyst, phenol, lignin, formaldehyde and organic compounds containing amino groups are prepared by polycondensation and dehydration, and the obtained molecular weight is 600-600. 1000 basic phenolic resin.

[0039] The lignosulfonate is one or more of sodium lignosulfonate, calcium lignosulfonate, and magnesium lignosulfonate.

[0040] The preparation method of the expandable graphite is as follows: using 50-mesh high-carbon flake graphite, concentrated sulfuric acid, potassium dichromate and hydrogen peroxi...

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PUM

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Abstract

The invention discloses a flat-plate solar collector heat insulation material and a preparation method thereof. The flat-plate solar collector heat insulation material is prepared from the following raw materials in parts by weight: 80 to 90 parts of phenolic resin, 10 to 15 parts of lignin, 5 to 8 parts of lignosulfonate, 5 to 7 parts of expansible graphite, 8 to 12 parts of foaming agent, 15 to20 parts of curing agent, 3 to 5 parts of stabilizer, 1 to 2 parts of catalyst, 20 to 30 parts of water. According to the flat-plate solar collector heat insulation material provided by the invention,the lignin and the lignosulfonate are added during a production process, so that a heat insulation performance and a fireproof performance of the phenolic resin are ensured, meanwhile, the strength and the toughness of the phenolic resin are improved, and the production cost is reduced at the same time; since the expansible graphite is added, the service life is prolonged and the quality stability of a flat-plate solar collector can be greatly improved.

Description

technical field [0001] The invention relates to the field of thermal insulation materials, in particular to a thermal insulation material for a flat solar heat collector and a preparation method thereof. Background technique [0002] With the increasing shortage of energy and the increasing pressure on environmental protection, countries around the world have begun to promote the development of renewable energy, among which solar energy is the most widely used and developed renewable energy with the best development prospects, and has been widely used in various industries , the solar water heater industry is one of them. Our country is rich in solar energy resources and has broad prospects for solar energy utilization. At present, it is the first user and producer of solar water heaters in the world. [0003] Insulation materials are generally materials with a thermal coefficient less than or equal to 0.12. The traditional thermal insulation materials are mainly to increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L97/00C08K7/24C08J9/14C08G8/28
CPCC08G8/28C08J9/141C08J2203/14C08J2203/182C08J2361/14C08J2497/00C08K7/24
Inventor 谢彤方凤才马付杰庞祖西邓颖成陈伟恒阮冰芯
Owner NANNING KEYU ENERGY TECH CO LTD
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