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Construction of 3D Multiple Networks Skeleton by Thiol-Michael Addition Click Reaction to Fabricate

Novel porous polymer/graphene composite aerogels with multiple network structure, enhanced compressive properties and high thermal conductivity are first fabricated by adsorbing water vapour, reduction, 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 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 the advantages combination of all the components, 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 the heat radiating element, oil/water separator and high performance materials.

This paper highlights application of the C-Therm TCi Thermal Conductivity Analyzer.

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