文献类型：期刊文献

英文题名：Interfacial-Engineered Sub-Crystalline Silica Aerogels with Extreme Thermal Anisotropy for Ultrahigh-Energy Laser Protection

作者：Ma, Huihuang[1];Liu, Yikun[1];Gao, Jianfei[2];Lin, Qunfang[3];Fan, Chuanjie[1];Zhou, Xiaodong[1,4];Zhang, Liangshun[3]

机构：[1]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai Key Lab Multiphase Mat Chem Engn, Sch Chem Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]Henan Univ Technol, Sch Chem & Chem Engn, Zhengzhou 450001, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

年份：2025

卷号：17

期号：40

起止页码：56520

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20254219339182);WOS:【SCI-EXPANDED(收录号:WOS:001583648500001)】；

基金：This work was supported by the National Natural Science Foundation of China (22333002 and 22073028).

语种：英文

外文关键词：thermal management; laser protection; silicaaerogel; anisotropic architecture; interfacial-inducedcrystallization

摘要：While silica aerogels have emerged as promising thermal management materials, their practical applications under extreme conditions such as ultrahigh-energy laser irradiation or thermal shocks exceeding 2000 degrees C are fundamentally limited by catastrophic thermal insulation failure and mechanical instability. Herein, we report a breakthrough multiphase subcrystalline silica aerogel (MSC-SA) architecture engineered through interfacial-induced crystallization with quartz fibers. By implementing a "inter-layered insulation/in-plane conduction" design paradigm, the MSC-SAs can achieve a feature of extreme thermal anisotropy-combining unprecedented axial insulation with ultraefficient radial heat dissipation. This unique thermal management strategy enables the simultaneous achievement of record-high laser damage resistance with a threshold of 3.0 x 104 W.cm-2 and protection duration exceeding 5 min, exceptional thermal stability of an ultralow thermal expansion coefficient of 1.0 x 10-6 degrees C1- at 1200 degrees C, and remarkable mechanical robustness evidenced by interfacial shear strength of 43.7 MPa and compressive strength of 32.0 MPa at 95% strain. Our proposed MSC-SAs are ideal for thermal superinsulation materials capable of withstanding extreme environments, particularly in advanced defense applications against high-energy laser threats.