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Preparation method of hydrophobic silica aerogel heat-insulation composite material
The invention relates to a preparation method of a hydrophobic silica aerogel heat-insulation composite material. The method comprises steps as follows: (1) preparation of silica sol: siloxane is used as a precursor, an organic solvent, water and an acid catalyst are added, and the silica sol is obtained; (2) preparation of composite gel: a flame retardant and an infrared blocking agent are added to the silica sol, the mixture is evenly mixed, a base catalyst is added, an inorganic fiber product is immersed in the silica sol, and the mixture is left to stand; (3) solvent replacement: the composite gel is replaced by the organic solvent; (4) drying: the composite gel is dried. With the adoption of the method, the process is simple, the production cycle is short, the cost is lower, the equipment requirement is low, reaction conditions are controllable, product performance is excellent, and the prepared silica aerogel composite material has the overall waterproof performance, the extremely low heat conductivity coefficient and the excellent high-temperature heat-insulation performance, can pass an incombustibility test under the condition that the material is ensured to be hydrophobic as a whole and reaches level A1 according to the incombustibility test.
Preparation method of hydrophobic silica aerogel heat-insulation composite material
The invention relates to a preparation method of a hydrophobic silica aerogel heat-insulation composite material. The method comprises steps as follows: (1) preparation of silica sol: siloxane is used as a precursor, an organic solvent, water and an acid catalyst are added, and the silica sol is obtained; (2) preparation of composite gel: a flame retardant and an infrared blocking agent are added to the silica sol, the mixture is evenly mixed, a base catalyst is added, an inorganic fiber product is immersed in the silica sol, and the mixture is left to stand; (3) solvent replacement: the composite gel is replaced by the organic solvent; (4) drying: the composite gel is dried. With the adoption of the method, the process is simple, the production cycle is short, the cost is lower, the equipment requirement is low, reaction conditions are controllable, product performance is excellent, and the prepared silica aerogel composite material has the overall waterproof performance, the extremely low heat conductivity coefficient and the excellent high-temperature heat-insulation performance, can pass an incombustibility test under the condition that the material is ensured to be hydrophobic as a whole and reaches level A1 according to the incombustibility test.
Preparation method of hydrophobic silica aerogel heat-insulation composite material
YU SHENGJIN (Autor:in) / ZHANG RONGYAN (Autor:in) / SUN QIANQIAN (Autor:in) / OUYANG HONGWU (Autor:in) / LIU BING (Autor:in)
29.04.2015
Patent
Elektronische Ressource
Englisch
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