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Open AccessArticle

Synergistic Effect of Graphene Oxide and Mesoporous Structure on Flame Retardancy of Nature Rubber/IFR Composites

1
Sino-Spanish Advanced Materials Institute, Shenyang University of Chemical Technology, Shenyang 110142, China
2
Liaoning Provincial Key Laboratory of Rubber & Elastomer, Shenyang 110142, China
3
IMDEA Materials Institute, C/Eric Kandel 2, Getafe, 28906 Madrid, Spain
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 1005; https://doi.org/10.3390/ma11061005
Received: 5 May 2018 / Revised: 2 June 2018 / Accepted: 7 June 2018 / Published: 13 June 2018
Aiming to improve the flame retardancy performance of natural rubber (NR), we developed a novel flame retardant synergistic agent through grafting of MCM-41 to graphene oxide (GO), named as GO-NH-MCM-41, as an assistant to intumescent flame retardants (IFR). The flame retardancy of NR/IFR/GO-NH-MCM-41 composites was evaluated by limited oxygen index (LOI), UL-94, and cone calorimeter test. The LOI value of NR/IFR/GO-NH-MCM-41 reached 26.3%; the UL-94 ratings improved to a V-0 rating. Moreover, the addition of GO-NH-MCM-41 decreased the peak heat release rate (PHRR) and the total heat release (THR) of the natural rubber composites. Furthermore, the addition of GO-NH-MCM-41 increased the thickness of char residue. The images of SEM indicated the char residue was more compact and continuous. The degradation of GO-NH-MCM-41-based NR composites was completed with a mass loss of 35.57% at 600 °C. The tensile strength and the elongation at break of the NR/IFR/GO-NH-MCM-41 composites were 13.9 MPa and 496.7%, respectively. The results of the rubber process analyzer (RPA) reached the maximum value, probably due to a better network of fillers in the matrix. View Full-Text
Keywords: natural rubber; GO-NH-MCM-41; graphene oxide; mesoporous; intumescent flame retardants natural rubber; GO-NH-MCM-41; graphene oxide; mesoporous; intumescent flame retardants
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MDPI and ACS Style

Wang, N.; Zhang, M.; Kang, P.; Zhang, J.; Fang, Q.; Li, W. Synergistic Effect of Graphene Oxide and Mesoporous Structure on Flame Retardancy of Nature Rubber/IFR Composites. Materials 2018, 11, 1005.

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