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Aerogel thermal insulation material and preparation method thereof
The invention belongs to the technical field of aerogel, and discloses an aerogel thermal insulation material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a silicon source aqueous solution and a cellulose solution, adding carbon fibers, carrying out a heating reaction to obtain composite wet gel, carrying out aging, aging and hydrophobic modification, and finally, carrying out normal-pressure drying to obtain the aerogel thermal insulation material. The carbon fiber is added on the basis of the cellulose-silicon dioxide composite aerogel, so that the mechanical property of the composite aerogel is further improved, and the composite aerogel has more excellent stability when being used for a heat insulation material. The preparation process is simple, the problems that the preparation process is complicated and the cost is increased due to the traditional multiple solvent replacement and supercritical drying process are solved, the production cost is greatly reduced, the used raw materials are cheap and easy to obtain, the preparation method is suitable for industrial large-scale production, and the prepared composite aerogel thermal insulation material is high in mechanical property, large in specific surface area and suitable for industrial large-scale production. The heat conductivity coefficient is low, and the thermal insulation performance is improved.
本发明属于气凝胶技术领域，公开了一种气凝胶隔热材料及其制备方法。本发明将硅源水溶液和纤维素溶液混合均匀后加入碳纤维，经加热反应得到复合湿凝胶，再进行陈化、老化以及疏水化改性，最后常压干燥，得到气凝胶隔热材料。本发明在纤维素‑二氧化硅复合气凝胶的基础上还增加了碳纤维，进一步提高了复合气凝胶的力学性能，在用于隔热保温材料时具有更优异的稳定性。本发明的制备工艺简单，解决了传统的多次溶剂置换以及超临界干燥工艺使制备过程繁杂且成本提高的问题，大大降低了生产成本，且使用的原料廉价易得，适用于工业化大规模生产，制得的复合气凝胶隔热材料力学性能高、比表面积大，导热系数较低，提高了保温性能。
Aerogel thermal insulation material and preparation method thereof
The invention belongs to the technical field of aerogel, and discloses an aerogel thermal insulation material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a silicon source aqueous solution and a cellulose solution, adding carbon fibers, carrying out a heating reaction to obtain composite wet gel, carrying out aging, aging and hydrophobic modification, and finally, carrying out normal-pressure drying to obtain the aerogel thermal insulation material. The carbon fiber is added on the basis of the cellulose-silicon dioxide composite aerogel, so that the mechanical property of the composite aerogel is further improved, and the composite aerogel has more excellent stability when being used for a heat insulation material. The preparation process is simple, the problems that the preparation process is complicated and the cost is increased due to the traditional multiple solvent replacement and supercritical drying process are solved, the production cost is greatly reduced, the used raw materials are cheap and easy to obtain, the preparation method is suitable for industrial large-scale production, and the prepared composite aerogel thermal insulation material is high in mechanical property, large in specific surface area and suitable for industrial large-scale production. The heat conductivity coefficient is low, and the thermal insulation performance is improved.
本发明属于气凝胶技术领域，公开了一种气凝胶隔热材料及其制备方法。本发明将硅源水溶液和纤维素溶液混合均匀后加入碳纤维，经加热反应得到复合湿凝胶，再进行陈化、老化以及疏水化改性，最后常压干燥，得到气凝胶隔热材料。本发明在纤维素‑二氧化硅复合气凝胶的基础上还增加了碳纤维，进一步提高了复合气凝胶的力学性能，在用于隔热保温材料时具有更优异的稳定性。本发明的制备工艺简单，解决了传统的多次溶剂置换以及超临界干燥工艺使制备过程繁杂且成本提高的问题，大大降低了生产成本，且使用的原料廉价易得，适用于工业化大规模生产，制得的复合气凝胶隔热材料力学性能高、比表面积大，导热系数较低，提高了保温性能。
Aerogel thermal insulation material and preparation method thereof
一种气凝胶隔热材料及其制备方法
LI XUEZHEN (author) / ZHANG AIMIN (author) / HAN TAO (author)
2022-03-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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