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A platform for research: civil engineering, architecture and urbanism
Preparation method of rigid silicon dioxide aerogel insulating board
The invention provides a preparation method of a high-strength low-carbon environment-friendly rigid silicon dioxide aerogel insulating board, which comprises the following steps: (1) taking 68-120g of sodium water glass with the modulus of 3.1-3.6, adding 100-200g of pure water, and stirring uniformly to obtain diluted water glass; (2) weighing 25-100g of 40 wt% sulfuric acid, adding 10-40g of ethanol, and stirring uniformly to obtain a sulfuric acid solution; (3) mixing the diluted water glass and sulfuric acid solution, and regulating the pH value to 3.5-4.5 to obtain a sol; (4) pouring the sol into a reinforcing-fiber-filled mold, gelatinating the sol after 10-15 minutes, and standing for 2-10 hours while keeping at the temperature of 50-80 DEG C, thereby obtaining a gel board; (5) carrying out integrated aging and acid alcohol treatment on the alcoholic aquagel board; (6) putting the gel board subjected to acid alcohol treatment into 1000-250ml of trimethylethoxy silane, treating at room temperature, and completing hydrophobic modification and gel drainage in one step within 6-10 hours; and (7) after the drainage is finished, drying the wet gel board with hot nitrogen or carbon dioxide.
Preparation method of rigid silicon dioxide aerogel insulating board
The invention provides a preparation method of a high-strength low-carbon environment-friendly rigid silicon dioxide aerogel insulating board, which comprises the following steps: (1) taking 68-120g of sodium water glass with the modulus of 3.1-3.6, adding 100-200g of pure water, and stirring uniformly to obtain diluted water glass; (2) weighing 25-100g of 40 wt% sulfuric acid, adding 10-40g of ethanol, and stirring uniformly to obtain a sulfuric acid solution; (3) mixing the diluted water glass and sulfuric acid solution, and regulating the pH value to 3.5-4.5 to obtain a sol; (4) pouring the sol into a reinforcing-fiber-filled mold, gelatinating the sol after 10-15 minutes, and standing for 2-10 hours while keeping at the temperature of 50-80 DEG C, thereby obtaining a gel board; (5) carrying out integrated aging and acid alcohol treatment on the alcoholic aquagel board; (6) putting the gel board subjected to acid alcohol treatment into 1000-250ml of trimethylethoxy silane, treating at room temperature, and completing hydrophobic modification and gel drainage in one step within 6-10 hours; and (7) after the drainage is finished, drying the wet gel board with hot nitrogen or carbon dioxide.
Preparation method of rigid silicon dioxide aerogel insulating board
CHEN GENG (author) / YANG ZHUOSHU (author) / LIU GUOQIANG (author) / FENG QIANG (author) / LIU JIANBO (author) / KUANG QINGLIN (author) / CHE JUNCHAO (author)
2015-09-30
Patent
Electronic Resource
English
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