A fluoroalkyl-silane (FS)-modified three-dimensional (3D) graphene foam (GF) composite (FS-GF) with a hierarchical porous microstructure was fabricated via a nickel foam template chemical vapor deposition and followed modification. The 3D GF, as an electrically conductive framework and hydrophobic porous substrate, was grafted with FS to further improve the hydrophobicity due to its long non-polar molecular chains and numerous fluoric/silicon functional groups. Porous FS-GF with high electrical conductivity (~650 S/m) is functionalized as a Joule-heating mesh for airflow, which synchronously demonstrates rapid heating rates, high conversion efficiencies, and uniform temperature distributions. Moreover, FS-GF exhibits self-cleaning and anti-icing properties that are superior to metallic and inorganic coatings. The outstanding performances of FS-GF suggest the potential for functionalizing 3D graphene composites using hierarchical structures at the multi-scale and chemical modifications of functional molecular groups.
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The authors gratefully appreciate financial support from Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University) (Grant No. lzujbky-2017-kb03), the Fundamental Research Funds for the Central Universities (PI: Dr. Qiangqiang Zhang, Grant No. lzujbky-2017-k17), and the National Natural Science Foundation of China (PI: Dr. Boyun Huang, Grant No. 51021063; PI: Dr. Qiangqiang Zhang, Grant: No. 51702142). We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.
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Zhang, Q., Zhang, B., Yu, Y. et al. Fluoroalkyl-silane-modified 3D graphene foam with improved Joule-heating effects and high hydrophobicity-derived anti-icing properties. J Mater Sci 53, 528–537 (2018). https://doi.org/10.1007/s10853-017-1536-1
- Graphene Foam (GF)
- Anti-icing Performance
- Fluoroalkylsilane (FS)
- Cassie Baxter State
- Excellent Hydrophobicity