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Polyaniline‐coupled graphene/nickel hydroxide nanohybrids as flame retardant and smoke suppressant for epoxy composites
Author(s) -
Guo Wenwen,
Wang Xin,
Pan Ying,
Cai Wei,
Xing Weiyi,
Song Lei,
Hu Yuan
Publication year - 2019
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4628
Subject(s) - thermogravimetric analysis , materials science , polyaniline , char , fire retardant , cone calorimeter , graphene , epoxy , hydroxide , composite material , chemical engineering , composite number , nickel , nuclear chemistry , pyrolysis , polymer , chemistry , nanotechnology , polymerization , metallurgy , engineering
Graphene‐polyaniline/nickel hydroxide ternary hybrid (RGO‐PANI/Ni(OH) 2 ) was synthesized and incorporated into epoxy resin (EP) to improve the fire retardant property. Thermogravimetric analysis results showed that the RGO‐PANI/Ni(OH) 2 nanohybrid could catalyze the thermal degradation of epoxy matrix that was essential to trigger the char formation. The char yield of the RGO‐PANI/Ni(OH) 2 /EP composite was improved compared with that of the samples with graphene and polyaniline only. With 3.0‐wt% RGO‐PANI/Ni(OH) 2 , significant reduction in peak heat release rate (40%) and peak smoke production rate (36%) was observed in the cone calorimeter tests. Thermogravimetric analysis/infrared spectrometry (TG‐IR) results indicated that the flammable volatiles of the RGO‐PANI/Ni(OH) 2 /EP composite was reduced compared with those of the EP and RGO‐PANI/EP. The superior flame retardant and smoke suppressant behaviors of the RGO‐PANI/Ni(OH) 2 nanohybrid over RGO‐PANI were attributed to the combination of good barrier effect of graphene with catalytic ability of char formation of PANI and metal hydroxide.