Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 42, Pages 22352-22360Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta07173f
Keywords
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Funding
- National Natural Science Foundation of China [51273109, 51235008]
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Novel porous polymer/graphene composite aerogels with a multiple network structure, enhanced compressive properties and high thermal conductivity are first fabricated by adsorbing water vapour, reduction, and freeze-drying procedures. The aerogels are comprised of a copolymer of monomethacrylate terminated poly(dimethylsiloxane) and glycidyl methacrylate (PDMS-PGMA), polydopamine-reduced graphene oxide (PDA-rGO), and poly(3-mercaptopropyl) methylsiloxane (PMMS). PMMS as a crosslinking agent reacts with PDMS-PGMA and PDA-rGO by the thiol-Michael addition click reaction, resulting in the formation of unique multiple networks in the aerogels. An aerogel with a low graphene loading (2 wt%) exhibits optimal comprehensive performance, i.e. a high thermal conductivity (0.816 W m(-1) K-1), high compressive stress at 50% compression ratio (3.4 MPa) and good oil-adsorption capacities. These outstanding properties of aerogels are attributed to the multiple networks and the interconnected PDA-rGO skeleton. The aerogels have potential applications in heat radiating elements, oil/water separators and high performance materials.
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