Effect of graphene nanosheets and layered double hydroxides on the flame retardancy and thermal degradation of epoxy resin
作者：Liu S, Yan HQ, Fang ZP*, Guo ZH, Wang H
關(guān)鍵字：graphene nanosheets, layered double hydroxides, nanocomposite, thermal stability, flame retardancy
論文來源：期刊
具體來源：RSC Advances, 2014.4, 4: 18652-18659
發(fā)表時間：2014年
Effect of graphene nanosheets (GNS) and layered double hydroxides (LDH) on morphology, flame retardancy and thermal degradation of epoxy resin (ER) was investigated. LDH was exfoliated in ER/GNS/LDH nanocomposites. GNS was partially exfoliated and partially agglomerated to form small clusters. Since not all of the GNS was in good dispersion, the compactness and barrier properties of residual char in ER/GNS/LDH were inferior to ER/GNS and ER/LDH. However, the simultaneous addition of GNS and LDH made the system have additional GNS-LDH interface, which could further increase the interactions in the melt, inhibited the flammable drips of ER and thus limited the flame propagation during combustion. As a result, a synergistic effect between GNS and LDH to improve the flame retardancy of ER was realized. The LOI value of ER increased from 15.9 to 23.6 by adding 0.5 wt% of GNS and 0.5 wt% of LDH. In comparison, the LOI value were 19.5 and 21.7 when 1 wt% of GNS or LDH was added separately.