Rapid preparation of Palygorskite/Al2O3 composite aerogels with superhydrophobicity, high-temperature thermal insulation and improved mechanical properties
Rapid preparation of Palygorskite/Al2O3 composite aerogels with superhydrophobicity, high-temperature thermal insulation and improved mechanical properties
复制标题
快速制备具有超疏水、高温隔热和改善机械性能的坡缕石/Al2O3复合气凝胶
DOI：
10.1016/j.ceramint.2022.07.231
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发表时间：
2022-08
影响因子：
5.2
通讯作者：
Jing Chen
中科院分区：
文献类型：
--
作者：
Xinyu Zhou;Huiran Jin;Qianning Shen;Wanxia Huang;Jiahui Li;Yuan Liang;Ping Mao;Yi Yang;Shan Yun;Jing Chen
Al 2 O3气凝胶由于其独特的低热导率和优异的高温稳定性而被广泛应用于隔热和阻燃领域。但Al 2 O3气凝胶的力学性能较差，制备时间较长.在本研究中，我们提出了一种简单且可扩展的方法来构建整体式Al 2 O3/Al 2 O3复合气凝胶，使用溶剂热处理代替传统的溶剂置换，这显著缩短了制备时间。随后，采用气相改性方法对SiO2/Al 2 O3气凝胶进行改性，以获得稳定的超疏水性（θ > 152°）。所制备的Al 2 O3/Al 2 O3复合气凝胶具有低密度（0.078- 0.106g/cm 3）、低热导率（1000 °C，0.143W/（m·K））、良好的力学性能（杨氏模量，1.6MPa）和良好的耐热性等综合性能。整体式Al 2 O3/Al 2 O 3复合气凝胶具有较好的力学性能和较好的热稳定性，在隔热领域显示出巨大的潜力。
Al 2 O 3 aerogels are widely employed in heat insulation and flame retardancy because of their unique combination of low thermal conductivity and exceptional high-temperature stability. However, the mechanical properties of Al 2 O 3 aerogel are poor, and the preparation time is considerably long. In this study, we present a simple and scalable approach to construct monolithic Pal/Al 2 O 3 composite aerogels using solvothermal treatment instead of traditional solvent replacement, which remarkably shortened the preparation time. Subsequently, to obtain stable superhydrophobicity ( θ > 152°), the Pal/Al 2 O 3 aerogel was modified by gas-phase modification method. The obtained Pal/Al 2 O 3 composite aerogels demonstrate the integrated properties of low density (0.078–0.106 g/cm 3 ), low thermal conductivity (1000 °C, 0.143 W/(m·K)), good mechanical properties (Young's modulus, 1.6 MPa), and good heat resistance. The monolithic Pal/Al 2 O 3 composite aerogels with improved mechanical performance and improved thermal stability can show great potential in the field of thermal insulation.
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影响因子：
17.1
作者：
Xinxin Zhang;Feiyan Wang;Lvye Dou;Xiaota Cheng;Y. Si;Jianyong Yu;B. Ding
通讯作者：
Xinxin Zhang;Feiyan Wang;Lvye Dou;Xiaota Cheng;Y. Si;Jianyong Yu;B. Ding
影响因子：
8.6
作者：
Benad, Albrecht;Juerries, Florian;Eychmueller, Alexander
通讯作者：
Eychmueller, Alexander
影响因子：
19
作者：
Junyan Zhang;Yanhua Cheng;M. Tebyetekerwa;Si Meng;Meifang Zhu;Yunfeng Lu
通讯作者：
Junyan Zhang;Yanhua Cheng;M. Tebyetekerwa;Si Meng;Meifang Zhu;Yunfeng Lu
银线气凝胶促进燃料电池和电化学传感器中过氧化氢的还原
影响因子：
11.9
作者：
Yang Yang;Zhang Heng;Wang Jinxu;Yang Siyuan;Liu Tianyu;Tao Kai;Chang Honglong
通讯作者：
Chang Honglong
影响因子：
2.5
作者：
L. Le Bihan;F. Dumeignil;E. Payen;J. Grimblot
通讯作者：
L. Le Bihan;F. Dumeignil;E. Payen;J. Grimblot