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A platform for research: civil engineering, architecture and urbanism
Preparation method of high-temperature-resistant hydrophobic SiO2 aerogel heat-insulation composite material
The invention provides a preparation method of a high-temperature-resistant hydrophobic SiO2 aerogel heat-insulation composite material. The preparation method comprises the following steps: 1, pretreatment: putting the SiO2 aerogel heat-insulation composite material into a muffle furnace for pretreatment; 2, hydrophobic modification: placing the pretreated SiO2 aerogel heat-insulation composite material and a hydrophobic modifier in a sealed bottle together, sealing the bottle opening, then placing the sealed bottle in a constant-temperature oven, and carrying out heat preservation for a period of time; and 3, drying: taking out the SiO2 aerogel heat-insulating composite material treated in the step 2 from the sealed bottle, putting the SiO2 aerogel heat-insulating composite material into a muffle furnace, heating to a certain temperature interval, and preserving heat to remove the hydrophobic reagent and reaction byproducts on the surface and in the material, thereby obtaining the high-temperature-resistant hydrophobic SiO2 aerogel heat-insulating composite material. The material has consistent and good hydrophobicity at the temperature below 500 DEG C, and on the basis of not changing the nanopore structure, the heat conductivity of the material is reduced, and the heat insulation and heat preservation performance of the material is effectively improved.
提供了一种耐高温疏水SiO2气凝胶隔热复合材料的制备方法，包括以下步骤：第一步，预处理：将SiO2气凝胶隔热复合材料放入马弗炉预处理；第二步，疏水改性：将预处理好的SiO2气凝胶隔热复合材料与疏水改性剂共同置于密封瓶中，将瓶口密封，随后放入恒温烘箱中，保温一段时间；第三步，干燥：将经过第二步处理后的SiO2气凝胶隔热复合材料从密封瓶中取出放入马弗炉中，升温加热至一定温度区间，然后保温，以去除材料表面和内部的疏水试剂以及反应副产物，得到所述耐高温疏水SiO2气凝胶隔热复合材料，其在500℃以下具有表现一致的良好疏水性，并且在不改变其纳米孔结构的基础上，降低了材料的热导率，有效提高了材料的隔热保温性能。
Preparation method of high-temperature-resistant hydrophobic SiO2 aerogel heat-insulation composite material
The invention provides a preparation method of a high-temperature-resistant hydrophobic SiO2 aerogel heat-insulation composite material. The preparation method comprises the following steps: 1, pretreatment: putting the SiO2 aerogel heat-insulation composite material into a muffle furnace for pretreatment; 2, hydrophobic modification: placing the pretreated SiO2 aerogel heat-insulation composite material and a hydrophobic modifier in a sealed bottle together, sealing the bottle opening, then placing the sealed bottle in a constant-temperature oven, and carrying out heat preservation for a period of time; and 3, drying: taking out the SiO2 aerogel heat-insulating composite material treated in the step 2 from the sealed bottle, putting the SiO2 aerogel heat-insulating composite material into a muffle furnace, heating to a certain temperature interval, and preserving heat to remove the hydrophobic reagent and reaction byproducts on the surface and in the material, thereby obtaining the high-temperature-resistant hydrophobic SiO2 aerogel heat-insulating composite material. The material has consistent and good hydrophobicity at the temperature below 500 DEG C, and on the basis of not changing the nanopore structure, the heat conductivity of the material is reduced, and the heat insulation and heat preservation performance of the material is effectively improved.
提供了一种耐高温疏水SiO2气凝胶隔热复合材料的制备方法，包括以下步骤：第一步，预处理：将SiO2气凝胶隔热复合材料放入马弗炉预处理；第二步，疏水改性：将预处理好的SiO2气凝胶隔热复合材料与疏水改性剂共同置于密封瓶中，将瓶口密封，随后放入恒温烘箱中，保温一段时间；第三步，干燥：将经过第二步处理后的SiO2气凝胶隔热复合材料从密封瓶中取出放入马弗炉中，升温加热至一定温度区间，然后保温，以去除材料表面和内部的疏水试剂以及反应副产物，得到所述耐高温疏水SiO2气凝胶隔热复合材料，其在500℃以下具有表现一致的良好疏水性，并且在不改变其纳米孔结构的基础上，降低了材料的热导率，有效提高了材料的隔热保温性能。
Preparation method of high-temperature-resistant hydrophobic SiO2 aerogel heat-insulation composite material
一种耐高温疏水SiO2气凝胶隔热复合材料的制备方法
JIANG YONGGANG (author) / HE HUI (author) / FENG JIAN (author) / FENG JUNZONG (author) / LI LIANGJUN (author)
2022-03-11
Patent
Electronic Resource
Chinese
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