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Combination of graphene and montmorillonite reduces the flammability of poly(vinyl alcohol) nanocomposites
Abstract A combination effect is observed between graphene and montmorillonite (Mt) in poly(vinyl alcohol) (PVA) composites. The results from X-ray diffraction (XRD) and transmission electron microscopy (TEM) show that both graphene sheets and Mt layers achieve fine dispersion in PVA matrix and Mt/graphene/PVA nanocomposites are formed. Thermal stability and flammability properties were investigated by thermogravimetric analysis (TGA) and cone calorimeter tests. The results show that the combination effect of graphene and Mt improves thermal stability and reduces significantly the flammability (including heat release rate (HRR), total heat release (THR), time to ignition (TTI), etc.). The peak heat release rate (PHRR) of Mt/graphene/PVA is reduced by about 49% compared with pure PVA. The morphology of residues generated after cone calorimeter tests was investigated by scanning electronic microscopy (SEM), and the results indicate that a compact and dense char is formed for Mt/graphene/PVA nanocomposites after combustion.
Highlights ► Mt/graphene/PVA nanocomposites were prepared by solvent blending. ► The graphene/Mt combination improved the thermal stability of nanocomposites. ► The graphene/Mt combination reduced the flammability of nanocomposites.
Combination of graphene and montmorillonite reduces the flammability of poly(vinyl alcohol) nanocomposites
Abstract A combination effect is observed between graphene and montmorillonite (Mt) in poly(vinyl alcohol) (PVA) composites. The results from X-ray diffraction (XRD) and transmission electron microscopy (TEM) show that both graphene sheets and Mt layers achieve fine dispersion in PVA matrix and Mt/graphene/PVA nanocomposites are formed. Thermal stability and flammability properties were investigated by thermogravimetric analysis (TGA) and cone calorimeter tests. The results show that the combination effect of graphene and Mt improves thermal stability and reduces significantly the flammability (including heat release rate (HRR), total heat release (THR), time to ignition (TTI), etc.). The peak heat release rate (PHRR) of Mt/graphene/PVA is reduced by about 49% compared with pure PVA. The morphology of residues generated after cone calorimeter tests was investigated by scanning electronic microscopy (SEM), and the results indicate that a compact and dense char is formed for Mt/graphene/PVA nanocomposites after combustion.
Highlights ► Mt/graphene/PVA nanocomposites were prepared by solvent blending. ► The graphene/Mt combination improved the thermal stability of nanocomposites. ► The graphene/Mt combination reduced the flammability of nanocomposites.
Combination of graphene and montmorillonite reduces the flammability of poly(vinyl alcohol) nanocomposites
Huang, Guobo (author) / Chen, Suqing (author) / Liang, Huading (author) / Wang, Xu (author) / Gao, Jianrong (author)
Applied Clay Science ; 80-81 ; 433-437
2013-01-08
5 pages
Article (Journal)
Electronic Resource
English
Mechanical Properties of Poly(vinyl alcohol) Montmorillonite Nanocomposites
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