聚(甲基丙烯酸甲酯-丙烯酸丁酯)/碳纳米管/羰基铁粉电致形状记忆磁性复合材料的制备

Preparation of Poly(Methyl Methacrylate-Butyl Acrylate)/Carbon Nanotubes/Carbonyl Iron Magnetic Electroactive Shape-Memory Composites

采用超声分散磁场下原位聚合的方法制备了聚(甲基丙烯酸甲酯-丙烯酸丁酯)/碳纳米管/羰基铁粉电致形状记忆磁性复合材料。采用扫描电镜(SEM)、红外热像仪和电学性能测试等方法实验表征了材料的结构与性能。结果表明,在磁场下原位聚合可使羰基铁粉沿磁场方向取向,赋予材料各向异性的导电性能和磁响应性。超声辐照能使碳纳米管均匀分散在聚合物基体中,在碳管质量分数仅为0.5%的情况下赋予材料高的导电率及优异的电响应形状记忆性能。

The poly（methyl methacrylate（MMA） butyl acrylate（BA））/carbon nanotubes（CNT）/carbonyl iron powder composite materials were prepared by in-situ polymerization under magnetic field.Ultrasonic irradiation was employed to assist the CNTs dispersion in MMA/BA monomer.Carbonyl iron powder was added to introduce magnetic property into composites.The scanning electron microscope（SEM） images suggested that the carbonyl iron powder is oriented and paralleled with the magnetic field direction,and uniform dispersion of carbon nanotubes in polymer matrix was obtained by the use of ultrasound irradiation.The infrared video camera was used to monitor electro-induced shape recovery and the temperature distribution of the composite simultaneously.The electrical conductivity of the composite is high,thus enabling the composite to complete the shape recovery within 90 s at 100 V voltages.