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Materials 2018, 11(6), 1005; https://doi.org/10.3390/ma11061005

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.
Received: 5 May 2018 / Revised: 2 June 2018 / Accepted: 7 June 2018 / Published: 13 June 2018
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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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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