Silicone/graphene oxide co-cross-linked aerogels with wide-temperature mechanical flexibility, super-hydrophobicity and flame resistance for exceptional thermal insulation and oil/water separation

Zhang, Zhao-Hui and Chen, Zuan-Yu and Tang, Yi-Hao and Li, Yu-Tong and Ma, Dequan and Zhang, Guo-Dong and Boukherroub, Rabah and Cao, Cheng-Fei and Gong, Li-Xiu and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Cao, Kun and Tang, Long-Cheng (2022) Silicone/graphene oxide co-cross-linked aerogels with wide-temperature mechanical flexibility, super-hydrophobicity and flame resistance for exceptional thermal insulation and oil/water separation. Journal of Materials Science & Technology, 114. pp. 131-142. ISSN 1005-0302


Abstract

Development of multifunctional and high-performance silicone aerogel is highly required for various promising applications. However, unstable cross-linking structure and poor thermal stability of silicone network as well as complicated processing restrict the practical use significantly. Herein, we report a facile and versatile ambient drying strategy to fabricate lightweight, wide-temperature flexible, super-hydrophobic and flame retardant silicone composite aerogels modified with low-content functionalized graphene oxide (FGO). After optimizing silane molecules, incorporation of γ-aminopropyltriethoxysilane functionalization is found to promote the dispersion stability of GO during the hydrolysis-polymerization process and thus produce the formation of unique strip-like co-cross-linked network. Consequently, the aerogels containing ∼2.0 wt% FGO not only possess good cyclic compressive stability under strain of 70% for 100 cycles and outstanding mechanical reliability in wide temperature range (from liquid nitrogen to 350 °C), but also display excellent flame resistance and super-hydrophobicity. Further, the optimized silicone/FGO aerogels display exceptional thermal insulating performance superior to pure aerogel and hydrocarbon polymer foams, and they also show efficient oil absorption and separation capacity for various solvents and oil from water. Clearly, this work provides a new route for the rational design and development of advanced silicone composite aerogels for multifunctional applications.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 23 Mar 2022 22:55
Last Modified: 26 Mar 2022 05:55
Uncontrolled Keywords: Flame resistance; Functionalized graphene oxide; Mechanical robustness; Silicone composite aerogel; Super-hydrophobicity
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2020): 24 MANUFACTURING > 2409 Industrial chemicals and related products > 240910 Plastics
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240908 Organic industrial chemicals (excl. resins, rubber and plastics)
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.jmst.2021.11.012
URI: http://eprints.usq.edu.au/id/eprint/47360

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