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A kind of preparation method of the insulation board of doping modified nano hole SIO2

A technology of nanopores and insulation boards, applied in the field of building insulation materials, can solve the problems of high cost, restrictions on the large-scale application of composite products, and high thermal conductivity, and achieve the effect of comprehensive performance improvement

Inactive Publication Date: 2016-08-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN103865097A adds nano airgel to phenolic foam to prepare phenolic foam board containing nano airgel, which solves the problems of phenolic foam board, high thermal conductivity and poor toughness
However, the excellent thermal insulation properties of nanoporous SiO 2 In the preparation process, supercritical drying is generally required, and there is a problem of high cost. The cost is about 3 to 5 times that of materials such as phenolic foam and polystyrene board, which seriously limits the large-scale application of composite products.

Method used

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  • A kind of preparation method of the insulation board of doping modified nano hole SIO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0028] Mix methyltrimethoxysilane, 3aminopropyltriethoxysilane, resorcinol, formaldehyde and absolute ethanol in a weight ratio of 1:1:0.4:0.5:12, stir at room temperature for 20min to make it Mix evenly, seal and store the above solution, and incubate at 40°C for 24h to form a gel. The resulting gel was then soaked in ethanol, incubated at 40°C for 24h to remove residual chemicals, and then dried at 60°C for 24h to obtain the modified nanoporous SiO 2 .

[0029] Phenolic resin, modified nanoporous SiO 2 , foaming agent, surfactant, and curing agent are mixed evenly at a weight ratio of 100:0.02:5:5:20, stirred quickly for 20s, then poured into a mold for foaming, and kept at 40°C for 1h to obtain the blend Hetero-modified nanoporous SiO 2 phenolic foam insulation board.

Embodiment example 2

[0031] Mix methyltrimethoxysilane, 3aminopropyltriethoxysilane, resorcinol, formaldehyde and absolute ethanol in a weight ratio of 1:1:0.4:0.5:12, stir at room temperature for 20min to make it Mix evenly, seal and store the above solution, and incubate at 40°C for 24h to form a gel. The resulting gel was then soaked in ethanol, incubated at 40°C for 24h to remove residual chemicals, and then dried at 60°C for 24h to obtain the modified nanoporous SiO 2 .

[0032] For doping modified nanoporous SiO 2 Polyurethane foam insulation board, polyether polyol, diisocyanate, modified nanoporous SiO 2 , The fluorine-free aqueous solution is mixed evenly according to the weight ratio of 100:150:0.03:20, and the above mixed solution is injected into a high-pressure foaming machine for foaming. The foaming temperature is 20-60°C, and the foaming time is 10-200s. It is injected into the mold, and then aged at 20-60°C for 12-48h to obtain doped modified nanoporous SiO 2 polyurethane foam...

Embodiment example 3

[0034] Mix methyltrimethoxysilane, 3aminopropyltriethoxysilane, resorcinol, formaldehyde and absolute ethanol in a weight ratio of 1:1:0.4:0.5:12, stir at room temperature for 20min to make it Mix evenly, seal and store the above solution, and incubate at 40° C. for 24 hours to form a gel. The resulting gel was then soaked in ethanol, incubated at 40°C for 24h to remove residual chemicals, and then dried at 60°C for 24h to obtain the modified nanoporous SiO 2 .

[0035] The expandable polystyrene particles are injected into the pre-expanding machine for pre-foaming, and then the polystyrene particles, modified nanoporous SiO 2 , The foaming agent is mixed evenly according to the weight ratio of 100:0.02:2, put into the preheated molding mold, and molded under steam pressure to obtain doped modified nanoporous SiO2 polystyrene foam insulation board.

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Abstract

The invention discloses a preparation method of an insulation board doped with modified nanopore SiO2 and belongs to the technical field of building thermal insulation materials. According to the preparation method, a silicon source containing the methyl is adopted and only ethanol is taken as a solvent to improve the hydrophobicity of the material, the strength of the material is improved by virtue of modification by use of resorcinol, and consequently, the low-cost modified nanopore SiO2 is prepared at normal temperature and under normal pressure. The modified nanopore SiO2 is doped into traditional thermal insulation materials such as phenolic foam, polyurethane and polystyrene boards, and therefore, a low-cost large-scale preparation method of a universal insulation board doped with the modified nanopore SiO2 is developed. For the insulation board prepared by use of the method, the integrated properties such as heat insulation, inflaming retarding, moisture proofing and strength of the traditional thermal insulation materials are improved.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials for buildings, in particular to a doped modified nanoporous SiO 2 The preparation method of the insulation board. Background technique [0002] Thermal insulation materials are widely used in high energy consumption fields such as construction, industry and transportation, which can greatly reduce energy consumption, reduce environmental pollution and greenhouse effect, and have great economic value and social benefits. Commonly used insulation materials in the construction field include phenolic foam, polyurethane, polystyrene board, etc. These materials have the advantages of low cost, good thermal insulation performance, and good formability. With the continuous improvement of national requirements for energy saving, weight, and safety of materials, how to further reduce the thermal conductivity and density of traditional materials and improve their flame retardancy has be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L75/04C08L25/06C08K9/04C08K3/36C08J9/14C08G18/48
Inventor 王戈高鸿毅金召奎栾奕董文钧李洁贾丹丹谭丽
Owner UNIV OF SCI & TECH BEIJING
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