Synergistic effect of novel ionic liquid/graphene complex on the flame retardancy of epoxy nanocomposites

编号 020038003

推送时间 20230130

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Synergistic effect of novel ionic liquid/graphene complex on the flame retardancy of epoxy nanocomposites

来源期刊 Carbon Letters

期 第380期

发表时间 20221221

关键词 Ionic liquid;  Flame retardant;  Graphene;  Nanocomposite; 

摘要 Epoxy resin (EP) is a thermosetting resin with excellent properties, but its application is limited due to its high brittleness and poor flame retardancy. Therefore, to solve this problem, a dispersion system of imidazole-containing ionic liquid ([Dmim]Es) and graphene in epoxy resin is designed based on the pi-pi stacking effect between imidazole and graphite layers. The study on the thermal and flame-retardant properties of the composites show that the modified [Dmim]Es-graphene nanosheets improved the flame retardancy, smoke suppression and thermal stability of epoxy resin. With the addition of 5wt% [Dmim]Es and 1% Gra, the exothermic rate (HRR) and total exothermic (THR) of the composites decrease by 35% and 30.2% compared with the untreated epoxy cross-linking, respectively. The limiting oxygen index reaches 33.4%, the UL-94 test rating reaches V-0. The characterization of mechanical properties shows that the tensile properties and impact properties increased by 13% and 30%, respectively. Through SEM observation, the addition of [Dmim]Es improves the dispersion of graphene in the EP collective and changes the mechanical fracture behavior. The results show that ionic liquid [Dmim]Es-modified graphene nanosheets are well dispersed in the matrix, which not only improves the mechanical properties of epoxy resin (EP), but also has a synergistic effect on flame retardancy. This work provides novel flame-retardant and graphene dispersion methods that broaden the range of applications of epoxy resins.

服务人员 尚玮姣

服务院士 宋湛谦

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