Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature-resistant high-toughness nanowire aerogel material and preparation method thereof
The invention relates to a high-temperature-resistant high-toughness nanowire aerogel material and a preparation method thereof.The method comprises the steps that aluminum oxide nanometer powder, boron nitride nanosheets and a sulfuric acid solution are evenly mixed with water, a mixed solution is obtained, then the mixed solution is placed at the temperature of 150-300 DEG C for a hydrothermal reaction for 12-18 h, and gel is obtained; the mass fraction of the aluminum oxide nano powder contained in the mixed solution is 5-20%, and the mass fraction of the boron nitride nanosheets contained in the mixed solution is 1-5%; the obtained gel is placed in a silica sol solution containing a catalyst to be soaked for 6-72 h, then the steps of aging, solvent replacement and supercritical drying are sequentially carried out, and the boron nitride doped nanowire aerogel material is obtained; the boron nitride doped nanowire aerogel material is subjected to heat treatment, and the high-temperature-resistant and high-toughness nanowire aerogel material is prepared. The nanowire aerogel material which is good in temperature resistance, tough, low in density and efficient in heat insulation is obtained.
本发明涉及一种耐高温高强韧纳米线气凝胶材料及其制备方法，所述方法为：用水将氧化铝纳米粉、氮化硼纳米片和硫酸溶液混合均匀，得到混合液，然后将所述混合液置于150～300℃下水热反应12～18h，得到凝胶；所述混合液中含有的氧化铝纳米粉的质量分数为5～20％，所述混合液中含有的氮化硼纳米片的质量分数为1～5％；将得到的凝胶置于包含有催化剂的硅溶胶溶液中浸泡6‑72h，然后依次经老化、溶剂置换和超临界干燥的步骤，得到氮化硼掺杂的纳米线气凝胶材料；将氮化硼掺杂的纳米线气凝胶材料进行热处理，制得耐高温高强韧纳米线气凝胶材料。本发明得到了一种耐温性佳、强韧、低密度且高效隔热的纳米线气凝胶材料。
High-temperature-resistant high-toughness nanowire aerogel material and preparation method thereof
The invention relates to a high-temperature-resistant high-toughness nanowire aerogel material and a preparation method thereof.The method comprises the steps that aluminum oxide nanometer powder, boron nitride nanosheets and a sulfuric acid solution are evenly mixed with water, a mixed solution is obtained, then the mixed solution is placed at the temperature of 150-300 DEG C for a hydrothermal reaction for 12-18 h, and gel is obtained; the mass fraction of the aluminum oxide nano powder contained in the mixed solution is 5-20%, and the mass fraction of the boron nitride nanosheets contained in the mixed solution is 1-5%; the obtained gel is placed in a silica sol solution containing a catalyst to be soaked for 6-72 h, then the steps of aging, solvent replacement and supercritical drying are sequentially carried out, and the boron nitride doped nanowire aerogel material is obtained; the boron nitride doped nanowire aerogel material is subjected to heat treatment, and the high-temperature-resistant and high-toughness nanowire aerogel material is prepared. The nanowire aerogel material which is good in temperature resistance, tough, low in density and efficient in heat insulation is obtained.
本发明涉及一种耐高温高强韧纳米线气凝胶材料及其制备方法，所述方法为：用水将氧化铝纳米粉、氮化硼纳米片和硫酸溶液混合均匀，得到混合液，然后将所述混合液置于150～300℃下水热反应12～18h，得到凝胶；所述混合液中含有的氧化铝纳米粉的质量分数为5～20％，所述混合液中含有的氮化硼纳米片的质量分数为1～5％；将得到的凝胶置于包含有催化剂的硅溶胶溶液中浸泡6‑72h，然后依次经老化、溶剂置换和超临界干燥的步骤，得到氮化硼掺杂的纳米线气凝胶材料；将氮化硼掺杂的纳米线气凝胶材料进行热处理，制得耐高温高强韧纳米线气凝胶材料。本发明得到了一种耐温性佳、强韧、低密度且高效隔热的纳米线气凝胶材料。
High-temperature-resistant high-toughness nanowire aerogel material and preparation method thereof
一种耐高温高强韧纳米线气凝胶材料及其制备方法
ZHANG HAO (Autor:in) / ZHANG ENSHUANG (Autor:in) / LI WENJING (Autor:in) / ZHANG WANLIN (Autor:in) / LIU YUANYUAN (Autor:in)
29.07.2022
Patent
Elektronische Ressource
Chinesisch
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