Self-assembly of exfoliated molybdenum disulfide (MoS2) nanosheets and layered double hydroxide (LDH): Towards reducing fire hazards of epoxy

Keqing Zhou; Rui Gao; Xiaodong Qian

doi:10.1016/j.jhazmat.2017.05.046

Self-assembly of exfoliated molybdenum disulfide (MoS₂) nanosheets and layered double hydroxide (LDH): Towards reducing fire hazards of epoxy

J Hazard Mater. 2017 Sep 15:338:343-355. doi: 10.1016/j.jhazmat.2017.05.046. Epub 2017 May 27.

Authors

Keqing Zhou¹, Rui Gao², Xiaodong Qian³

Affiliations

¹ Faculty of Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, Hubei 430074, PR China. Electronic address: zhoukq@cug.edu.cn.
² Faculty of Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, Hubei 430074, PR China.
³ Chinese People's Armed Police Force Academy, Xichang Road 220, Langfang City, Hebei Province, 065000, PR China.

PMID: 28595156
DOI: 10.1016/j.jhazmat.2017.05.046

Abstract

In present study, LDH/MoS₂ hybrids were facilely prepared by self-assembly of exfoliated MoS₂ nanosheets and LDH via electrostatic force. The structure and morphology of the LDH/MoS₂ hybrids were characterized and then introduced into epoxy for reducing its fire hazards. Compared with single MoS₂, LDH/MoS₂ hybrids showed a more homogeneous dispersion in the epoxy matrix and no obvious agglomerates were observed. Compared with MoS₂, the addition of LDH/MoS₂ hybrids endowed more excellent fire resistance to epoxy matrix, which was reflected by the significantly reduced peak heat release rate, total heat release and total smoke production. A rational flame retardant mode of action for LDH/MoS₂ hybrids was proposed based on the analysis of pyrolysis fragments and char residues.

Keywords: Epoxy; Fire hazards; LDH; MoS(2) nanosheets; Self-assembly.