Lightweight, surface hydrophobic and flame-retardant polydimethylsiloxane foam composites coated with graphene oxide via interface engineering - Details

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Abstract：

Silicone　rubber　foam　(SiRF)　is　increasingly　recognized　as　a　versatile　polymeric　foam　in　industrial　applications,　owing　to　its　broad　temperature　stability,　weather　resistance,　and　outstanding　thermal　insulation　properties.　However,　the　inherent　flammability　of　SiRFs　limits　their　application　in　certain　areas.　Previous　attempts　to　enhance　the　flame　retardancy　of　SiRFs　typically　involved　the　addition　of　various　functional　fillers　and　complex　assembly　strategies,　which　often　lead　to　complicated　processes,　weak　interfacial　bonding,　and　potential　degradation　of　other　key　properties.　Therefore,　preparing　flame-retardant　silicone　rubber　using　a　simple,　low-filler,　and　large-scale　production　strategy　is　a　significant　challenge.　In　this　study,　we　introduce　a　self-adhesive　silicone　rubber　foam　(Sa-SiRF)　modified　with　residual　Si-H　reactive　groups　using　a　straightforward　dip-coating　method,　employing　graphene　oxide　nanosheets　(GO)　for　this　enhancement.　The　refined　Sa-SiRF-GO　nanocomposite　exhibits　exceptional　mechanical　properties　across　a　temperature　range　of　30–200　°C,　as　well　as　remarkable　surface　hydrophobicity,　evidenced　by　a　high　water　contact　angle　(WCA)　of　approximately　142.6°.　Additionally,　this　material　demonstrates　robust　structural　stability　under　varying　environmental　conditions　(pH　=　1,　7,　14),　and　an　improved　flame　retardancy,　with　the　limiting　oxygen　index　(LOI)　rising　from　21.5　%　to　27.0　%.　Furthermore,　a　comprehensive　analysis　of　the　flame　retardation　mechanism　of　Sa-SiRF-GO　samples　was　conducted.　This　flame-retardant　silicone　rubber　foam,　developed　through　a　GO-enhanced　dip-coating　process,　shows　great　promise　for　applications　that　require　both　flame　retardancy　and　thermal　insulation.　Our　approach,　which　leverages　interfacial　engineering　to　create　GO-coated　self-adhesive　SiRF　composites,　effectively　overcomes　the　limitations　associated　with　high　filler　content　and　the　complexities　of　traditional　methods.　This　innovative　technique　is　poised　to　spur　further　advancements　in　conventional　PDMS　foams　and　contribute　to　the　development　of　advanced　polymer　foam　nanocomposites.　©　2024　Elsevier　B.V.

Keyword：

Adhesives Contact angle Dip coating Fillers Foams Graphene Hydrophobicity Nanocomposites Silicone rubber Stability Thermal insulation

Community：

[ 1 ] [Shen, Fei-Xiang]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 2 ] [Li, Yang]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 3 ] [Li, Yang]Department of Physics, Gachon University, Gyeonggi-do, Seongnam-si; 13120, Korea, Republic of
[ 4 ] [Chen, Zuan-Yu]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 5 ] [Cao, Cheng-Fei]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 6 ] [Cao, Cheng-Fei]Centre for Future Materials, University of Southern Queensland, Springfield Campus, QLD; 4300, Australia
[ 7 ] [Shen, Yan-Bin]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 8 ] [Li, Long-Tao]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 9 ] [Pan, Long-Qian]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 10 ] [Li, Jia-Yun]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 11 ] [Zhang, Guo-Dong]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China
[ 12 ] [Gao, JieFeng]School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou; 225002, China
[ 13 ] [Shi, Yongqian]College of Environment and Safety Engineering, Fuzhou University, Fuzhou; 350116, China
[ 14 ] [Song, Pingan]Centre for Future Materials, University of Southern Queensland, Springfield Campus, QLD; 4300, Australia
[ 15 ] [Song, Pingan]School of Agriculture and Environmental Science, University of Southern Queensland, Springfield; 4300, Australia
[ 16 ] [Bae, Joonho]Department of Physics, Gachon University, Gyeonggi-do, Seongnam-si; 13120, Korea, Republic of
[ 17 ] [Tang, Long-Cheng]Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou; 311121, China

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