Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ceramic nanofiber aerogel with zigzag continuous phase structure and preparation method thereof
The invention relates to a ceramic nanofiber aerogel with a zigzag continuous phase structure and a preparation method of the ceramic nanofiber aerogel. The aerogel is formed by stacking and bonding a plurality of layers of ceramic nanofiber membranes with zigzag wave structures; the method comprises the following steps: (1) putting ceramic nanofiber membranes into silica sol for dipping, then taking out the ceramic nanofiber membranes, and stacking the ceramic nanofiber membranes layer by layer to prepare a fiber/silica sol composite block; and (2) carrying out speed-controlled step-by-step freezing on the obtained fiber/silica sol composite block, then carrying out vacuum drying, and then calcining to obtain a target product. The preparation method comprises the following steps: stacking ceramic nanofiber membranes in dilute silica sol layer by layer, inducing a single-layer fiber membrane to generate a zigzag wave structure through speed-controlled step-by-step freezing, and finally forming a stable bonding network between fiber membrane layers through high-temperature calcination, thereby obtaining the aerogel with a zigzag continuous phase structure. Compared with the prior art, the aerogel has good high-temperature heat insulation capacity and mechanical strength, and the preparation method is simple and good in controllability.
本发明涉及一种具有曲折连续相结构的陶瓷纳米纤维气凝胶及其制备方法，该气凝胶由多层呈曲折波浪结构的陶瓷纳米纤维膜堆叠粘结而成；该方法步骤包括：(1)取陶瓷纳米纤维膜放入硅溶胶中浸渍，然后取出陶瓷纳米纤维膜并逐层堆叠，制得纤维/硅溶胶复合块体；(2)将所得纤维/硅溶胶复合块体进行控速逐级冷冻，然后真空干燥，再进行煅烧，即得目的产物。本发明将陶瓷纳米纤维膜在稀浓度的硅溶胶中逐层堆叠，经控速逐级冷冻诱导单层纤维膜产生曲折波浪结构，最后通过高温煅烧在纤维膜层间形成稳定的粘结网络，得到具有曲折连续相结构的气凝胶。与现有技术相比，本发明气凝胶具有良好的高温隔热能力以及力学强度，且制备方法简单，可控性好。
Ceramic nanofiber aerogel with zigzag continuous phase structure and preparation method thereof
The invention relates to a ceramic nanofiber aerogel with a zigzag continuous phase structure and a preparation method of the ceramic nanofiber aerogel. The aerogel is formed by stacking and bonding a plurality of layers of ceramic nanofiber membranes with zigzag wave structures; the method comprises the following steps: (1) putting ceramic nanofiber membranes into silica sol for dipping, then taking out the ceramic nanofiber membranes, and stacking the ceramic nanofiber membranes layer by layer to prepare a fiber/silica sol composite block; and (2) carrying out speed-controlled step-by-step freezing on the obtained fiber/silica sol composite block, then carrying out vacuum drying, and then calcining to obtain a target product. The preparation method comprises the following steps: stacking ceramic nanofiber membranes in dilute silica sol layer by layer, inducing a single-layer fiber membrane to generate a zigzag wave structure through speed-controlled step-by-step freezing, and finally forming a stable bonding network between fiber membrane layers through high-temperature calcination, thereby obtaining the aerogel with a zigzag continuous phase structure. Compared with the prior art, the aerogel has good high-temperature heat insulation capacity and mechanical strength, and the preparation method is simple and good in controllability.
本发明涉及一种具有曲折连续相结构的陶瓷纳米纤维气凝胶及其制备方法，该气凝胶由多层呈曲折波浪结构的陶瓷纳米纤维膜堆叠粘结而成；该方法步骤包括：(1)取陶瓷纳米纤维膜放入硅溶胶中浸渍，然后取出陶瓷纳米纤维膜并逐层堆叠，制得纤维/硅溶胶复合块体；(2)将所得纤维/硅溶胶复合块体进行控速逐级冷冻，然后真空干燥，再进行煅烧，即得目的产物。本发明将陶瓷纳米纤维膜在稀浓度的硅溶胶中逐层堆叠，经控速逐级冷冻诱导单层纤维膜产生曲折波浪结构，最后通过高温煅烧在纤维膜层间形成稳定的粘结网络，得到具有曲折连续相结构的气凝胶。与现有技术相比，本发明气凝胶具有良好的高温隔热能力以及力学强度，且制备方法简单，可控性好。
Ceramic nanofiber aerogel with zigzag continuous phase structure and preparation method thereof
一种具有曲折连续相结构的陶瓷纳米纤维气凝胶及其制备方法
DING BIN (Autor:in) / CHANG XINYI (Autor:in) / SI YANG (Autor:in) / ZHANG XINXIN (Autor:in) / YIN XIA (Autor:in) / YU JIANYONG (Autor:in)
15.04.2022
Patent
Elektronische Ressource
Chinesisch
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