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原位合成了Fe3O4磁性纳米粒子修饰的氧化石墨烯(GO)复合物,并以聚乙二醇甲醚甲基丙烯酸酯(OEGMA)作为反应单体,聚乙二醇二甲基丙烯酸酯(OEGDMA)为交联剂,S-1-十二烷基-S′-(α,α′-二甲基-α″-乙酸)三硫代碳酸酯(TTC)作为RAFT试剂,通过可逆加成-断裂链转移聚合(RAFT)合成Fe3O4/GO增强的POEGMA复合凝胶。通过红外光谱、透射电镜等研究了产物的结构和形貌,测试了复合凝胶的磁性能与力学性能,探讨了聚合反应温度、交联度以及Fe3O4/GO复合物含量对复合凝胶力学性能的影响。结果显示,交联度增加,复合凝胶力学性能提高;50℃反应,复合凝胶力学性能随Fe3O4/GO复合物含量增加而提高;升高反应温度,复合凝胶结构变得不均匀,力学性能降低,并且Fe3O4/GO复合物的含量对力学性能的影响也变得复杂。
In situ synthesis of Fe3O4 magnetic nanoparticles modified graphene oxide (GO) composite, and polyethylene glycol methyl ether methacrylate (OEGMA) as the reaction monomer, polyethylene glycol dimethacrylate (OEGDMA ) As a cross-linking agent and S-1 -dodecyl-S ’- (α, α’-dimethyl- α "-acetic acid) trithiocarbonate (TTC) Synthesis of Fe3O4 / GO reinforced POEGMA composite gel by the fragmentation chain transfer polymerization (RAFT). The structure and morphology of the product were investigated by infrared spectroscopy and transmission electron microscopy. The magnetic properties and mechanical properties of the composite gel were tested. Temperature, degree of crosslinking and the content of Fe3O4 / GO composite on the mechanical properties of the composite gel.The results show that the crosslinking degree increases, the mechanical properties of the composite gel increase; 50 ℃ reaction, the mechanical properties of the composite gel with Fe3O4 / GO composite The content of Fe3O4 / GO composite increases with the increase of reaction temperature. As the reaction temperature increases, the structure of the composite gel becomes nonuniform, the mechanical properties decrease, and the influence of the content of Fe3O4 / GO composite on the mechanical properties also becomes complicated.