High-yield exfoliation of graphite in acrylate polymers: A stable few-layer graphene nanofluid with enhanced thermal conductivity

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• 作者：Zhenyu Sun ; Sascha P?ller ; Xing Huang ; Dmitrii Guschin ; Christoph Taetz ; Petra Ebbinghaus ; Justus Masa ; Andreas Erbe ; Andreas Kilzer ; Wolfgang Schuhmann ; Martin Muhler
• 刊名：Carbon
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：64
• 期：Complete
• 页码：288-294
• 全文大小：2329 K

文摘

High-yield exfoliation of pristine graphite in low boiling point alcohols was achieved using a set of acrylate polymers resulting in few-layer graphene concentrations of up to ¡«4 mg mL^?1. The polymer showed superior dispersing capabilities for graphene compared to the best reported dispersants, including the solvent N-methyl-pyrrolidone, the surfactants sodium cholate and sodium taurodeoxycholate, and the polymer polyvinylpyrrolidone. The dispersions were stable regardless of freezing (?26 ¡ãC) or heating (70 ¡ãC) for 24 h, or dilution with water up to 80 % volume ratio over 160 h. The as-obtained nanofluid exhibited an enhancement in thermal conductivity suggesting a great potential in coolant applications.