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Simultaneous reduction and surface functionalization of graphene oxide for enhancing flame retardancy and thermal conductivity of mesogenic epoxy composites
Author(s) -
Luo Fubin,
Wu Kun,
Guo Huilong,
Zhao Qiang,
Lu Mangeng
Publication year - 2017
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5249
Subject(s) - graphene , materials science , oxide , composite material , epoxy , surface modification , thermal stability , thermal conductivity , mesogen , polymer , composite number , chemical engineering , nanotechnology , liquid crystalline , engineering , metallurgy
Graphene oxide ( GO ) is reduced and surface functionalized by 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide simultaneously. This functional reduced graphene oxide (F‐ rGO ) with better thermal stability can be used as a nano‐filler to improve the flame retardancy, mechanical properties and thermal conductivity of mesogenic epoxy ( EO ). Due to the presence of an oriented structure, EO is an intrinsic highly thermal conductive polymer compared with common polymer. After being filled with F‐ rGO , the ordered domains in the EO matrix are connected by F‐ rGO . As a result, the thermal conductivity coefficient of F‐ rGO / EO composite is increased by 30.8% compared with pure EO . The dynamic mechanical analysis results indicate that E ' of F‐ rGO / EO is 26.7% higher than that of EO . Because of the stable structure of F‐ rGO , F‐ rGO / EO is self‐extinguishing. The total heat release of F‐ rGO / EO ‐15 is 24.1 kJ g −1 , which is 5.6 kJ g −1 lower than that of EO . © 2016 Society of Chemical Industry