以负载了甲基丙烯酸甲酯(MMA)和相变材料的埃洛石纳米管(HNTS)为载体,与改性氧化石墨烯共同构建负载相变材料的杂化气凝胶(HGA)。聚合物单体被引入到HNTS管腔中,通过聚合形成聚合物纳米线,与相邻石墨烯(GO)纳米片相互作用,将HNTS和GO紧密连接,形成三维(3D)多孔杂化气凝胶。当样品负载时,载荷将在GO纳米片、HNTS和聚合物纳米线之间有效传递。通过SEM、FT-IR、比表面积和孔径测试等表征了HGA的成功制备。通过压缩性能测试、激光显微拉曼光谱研究了HGA的应力传递行为。测试了材料的热性能,分析了其相变行为。结果表明,PMMA聚合物链和HNTS可以增强杂化气凝胶的结构,HGA中的相变材料在低温发生相变并具有良好的隔热保温性能。

Halloysite nanotubes (HNTS) loaded with methyl methacrylate (MMA) and phase change materials are used as carrier to construct hybridized aerogel (HGA) together with modified graphene oxide.Polymer nanowires are formed through polymerizing monomers in HNTS lumen.Polymer nanowires interact with adjacent graphene (GO) nanosheets to closely connect HNTS and GO to form three-dimensional (3D) porous hybrid aerogel.Loads are efficiently transported among GO nanosheets,HNTS,and polymer nanowires as the samples are force-loaded.Successful preparation of HGA is demonstrated through SEM,FT-IR,specific surface area,and pore size tests.The stress-transfer behavior of hybridized aerogel is studied by means of compressive property tests and laser microscopic Raman spectroscopic characterization.Phase change behavior of the aerogel material is analyzed,and the thermal properties are tested.Study results show that both PMMA polymer chains and HNTS can enhance the structure of HGA,and the phase change material in HGA changes its phase at low temperature,and provides a promising thermal insulation property.

房爱省(1982-),男,学士,工程师,研究方向为保温隔热气凝胶工艺研发,f@huayinm.com;李洪彦(1985-),男,博士,教授,研究方向为纳米复合材料,通讯联系人,li.hongyantcu@foxmail.com。