Inorganic micro/nanoparticle/polymer composite building thermal-insulation aerogel material and preparation method thereof

Abstract

The invention discloses an inorganic micro/nanoparticle/polymer composite building thermal-insulation aerogel material which is compounded from the following components in parts by weight: 0.5-50 parts of inorganic micro/nanoparticle, 0.1-5 parts of polymer, 0-10 parts of crosslinkable polymer, 0.5-20 parts of reinforcing fiber, 0.1-5 parts of defoaming agent and 100 parts of water. The density of the material is 12-620 Kg/m<3>, the heat conductivity coefficient is 0.016-0.025 w/m.k, and the combustion heat value is 1.1-2.0 MJ/Kg. The invention also provides a preparation method of the aerogel material. The aerogel material disclosed by the invention has the advantages of low density, light weight, favorable mechanical strength and low heat conductivity coefficient, and is beneficial to energy saving and consumption reduction. The combustion heat value is lower than 2.0 MJ/Kg, and thus, the aerogel material satisfies the flame-retardant requirements for Grade-A building thermal-insulation materials. The aerogel material is an ideal building flame-retardant thermal-insulation material, and can be widely used in external-wall thermal-insulation occasions.

Description

technical field [0001] The invention belongs to the technical field of nano-inorganic / polymer composite airgel material and its preparation, and specifically relates to an inorganic micro-nano particle / polymer composite building thermal insulation airgel material and a preparation method thereof. Background technique [0002] Energy saving and consumption reduction is an important measure to alleviate the energy shortage, and it is more urgent and important to our country. According to reports, my country's current building energy consumption has accounted for 30-40% of the total energy consumption of the society (Shao Yong; Zhang Yi. Exploration of the latest building insulation materials. Building Materials Development Orientation, 2011, 2:11.). This is because my country's existing buildings exceed 43 billion square meters, more than 95% of which are high energy-consuming buildings. However, the thermal insulation performance of building materials in my country is genera...

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Problems solved by technology

[0006] U.S. Patent No. 3,203,903 dissolves the polymer in the solvent to prepare airgel, adds clay, mixes uniformly and freeze-dries to prepare an inorganic airgel material with stable physical properties and strong mechanical properties, but this patent does not report this Specific indicators of flame retardant properties and thermal insulation properties of materials

[0007] U.S. Patent US20070208124 compounded clay, polymer and adhesive, prepared various microporous or nanoporous polymer airgel materials by freeze-drying method, and made polymer airgel materials with ceramic structure, but due to The addition ratio of polymer materials or binders is relatively high, so it is speculated that the flame retardancy of these materials is not high, and cannot meet the requirements of building insulation materials for flame retardancy

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