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Issue 5, 2019
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Vacuum-dried flexible hydrophobic aerogels using bridged methylsiloxane as reinforcement: performance regulation with alkylorthosilicate or alkyltrimethoxysilane co-precursors

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Abstract

Aerogels are porous materials with many attractive properties, but their large-scale applications are always restricted by the laborious procedures and poor mechanical properties. Herein, a novel monolithic flexible hydrophobic aerogel was prepared using a new type of bridged methylsiloxane as a precursor and tetraethoxysilane (TEOS), methyltrimethoxysilane (MTMS) or propyltrimethoxysilane (PTMS) as co-precursors in a facile and environmentally friendly procedure. The bridged precursor can not only help construct networks of aerogels but also act as an enhancer for its particular molecular structure. The co-precursors TEOS, MTMS, PTMS can tailor the texture and the properties of the aerogels by controlling the hydrolysis and condensation rates and their molecular structures. Co-precursors with faster reaction rates result in smaller particle size in the skeleton and a larger specific surface area. The obtained aerogels are hydrophobic and exhibit good mechanical properties with deformation as high as 80% and low density (0.078 g cm−3). The excellent properties make the aerogels good candidates for oil/water separation.

Graphical abstract: Vacuum-dried flexible hydrophobic aerogels using bridged methylsiloxane as reinforcement: performance regulation with alkylorthosilicate or alkyltrimethoxysilane co-precursors

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Publication details

The article was received on 09 Aug 2018, accepted on 10 Dec 2018 and first published on 24 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ04038A
Citation: New J. Chem., 2019,43, 2204-2212

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    Vacuum-dried flexible hydrophobic aerogels using bridged methylsiloxane as reinforcement: performance regulation with alkylorthosilicate or alkyltrimethoxysilane co-precursors

    D. Chen, K. Dong, H. Gao, T. Zhuang, X. Huang and G. Wang, New J. Chem., 2019, 43, 2204
    DOI: 10.1039/C8NJ04038A

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