Effect of graphene nanosheets and layered double hydroxides on the flame retardancy and thermal degradation of epoxy resin

Liu, Shan and Yan, Hongqiang and Fang, Zhengping and Guo, Zhenghong and Wang, Hao (2014) Effect of graphene nanosheets and layered double hydroxides on the flame retardancy and thermal degradation of epoxy resin. RSC Advances, 4 (36). pp. 18652-18659.

Text (Published Version) Liu_etal_RSCA_v4_PV.pdf Restricted

Abstract

The effects of graphene nanosheets (GNS) and layered double hydroxides (LDH) on morphology, flame retardancy and thermal degradation of epoxy resin (ER) were investigated. LDH was exfoliated in ER/GNS/LDH nanocomposites, while GNS was partially exfoliated and partially agglomerated into small clusters. Since not all of the GNS had 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 created an additional GNS–LDH interface, which could increase interaction in the melt and inhibit the flammable drips of ER and thus limit the flame propagation during combustion. As a result, a synergistic effect of simultaneous addition of GNS and LDH to improve the flame retardancy of ER was realized. The LOI value of ER was 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 was 19.5 and 21.7 when GNS or LDH was added separately, at the same level, 1 wt%. Furthermore, both GNS and LDH can increase the thermal stability of ER; there was a synergistic effect between them to decrease the THR of ER from 33.4 to 24.6.

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Item Type:	Article (Commonwealth Reporting Category C)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre:	Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Faculty/School / Institute/Centre:	Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Date Deposited:	21 May 2014 02:26
Last Modified:	04 Jul 2016 04:46
Uncontrolled Keywords:	flame retardation; epoxy resin; combustion
Fields of Research (2008):	09 Engineering > 0904 Chemical Engineering > 090405 Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels) 03 Chemical Sciences > 0399 Other Chemical Sciences > 039903 Industrial Chemistry 10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
Socio-Economic Objectives (2008):	B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified
Identification Number or DOI:	10.1039/c4ra01267d
URI:	http://eprints.usq.edu.au/id/eprint/25218

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