Preparation of halloysite nanotube-reinforced silica aerogels with thermal insulation and oil/water separation by ambient pressure drying

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-04-13 DOI:10.1016/j.cherd.2025.04.021

Xinran Hou, Jiankai Ji, Yanze Xiong, Yujie Song, Han Zhang, Mifeng Gou

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Abstract

Silica aerogels with low thermal conductivity demonstrate potential as energy-saving materials. In this study, the methyltriethoxysilane (MTES) and vinyltrimethoxysilane (VTMS) act as co-precursors in the preparation of modified halloysite nanotubes-reinforced silica aerogels (OMVSA) with varying modified halloysite nanotubes (OHNTs) content via the sol-gel process and ambient pressure drying. The OHNTs result in a reduction of shrinkage and adsorption efficiency of the resulting silica aerogel by 8.18 % and 113.67 %, respectively. Furthermore, the silica aerogels exhibit a low density of 0.143 g/cm³ , a low thermal conductivity of 0.055 W/m·K, commendable thermal stability up to 490℃, and hydrophobic properties, evidenced by a water contact angle of 129°. Additionally, the silica aerogel displays excellent oil/water separation capabilities and cyclic adsorption, enabling the rapid separation of oil-water mixtures. The reinforced silica aerogel shows immense potential for applications in building energy conservation, thermal insulation, and oil/water separation.

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常压干燥制备具有保温和油水分离功能的高岭土纳米管增强二氧化硅气凝胶

具有低导热系数的二氧化硅气凝胶显示出作为节能材料的潜力。在本研究中，甲基三乙氧基硅烷（MTES）和乙烯基三甲氧基硅烷（VTMS）作为共前驱体，通过溶胶-凝胶法和环境压力干燥法制备了改性高岭土纳米管增强二氧化硅气凝胶（OMVSA）。OHNTs使二氧化硅气凝胶的收缩率和吸附效率分别降低8.18% %和113.67 %。此外，二氧化硅气凝胶具有低密度0.143 g/cm³ ，低导热系数0.055 W/m·K，高达490℃的热稳定性和疏水性能，水接触角为129°。此外，二氧化硅气凝胶具有优异的油水分离能力和循环吸附能力，能够快速分离油水混合物。增强二氧化硅气凝胶在建筑节能、保温、油水分离等方面具有巨大的应用潜力。

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.