Thin Films of Intumescent Flame Retardant-Polyacrylamide and Exfoliated Graphene Oxide Fabricated via Layer-by-Layer Assembly for Improving Flame Retardant Properties of Cotton Fabric

A novel intumescent flame retardant-polyacrylamide (IFR-PAM) was prepared by the copolymerization of N1-(5,5-dimethyl-1,3,2-dioxaphosphinyl-2-yl)-acrylamide (DPAA) and acrylamide and was used to prepare various IFR-PAM/graphene oxide (GO) thin films via layer-by-layer (LbL) assembly as a flame retar...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2012-09, Vol.51 (38), p.12355-12366
Main Authors: Huang, Guobo, Yang, Jianguo, Gao, Jianrong, Wang, Xu
Format: Article
Language:English
Subjects:
Applied sciences
Assembly
Chemical engineering
Combustion
Cotton
Exact sciences and technology
Fabrics
Flame retardants
Graphene
Oxides
Thin films
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Summary:A novel intumescent flame retardant-polyacrylamide (IFR-PAM) was prepared by the copolymerization of N1-(5,5-dimethyl-1,3,2-dioxaphosphinyl-2-yl)-acrylamide (DPAA) and acrylamide and was used to prepare various IFR-PAM/graphene oxide (GO) thin films via layer-by-layer (LbL) assembly as a flame retardant coating system for cotton fabric. Films assembled with IFR-PAM and GO nanosheets show linear growth as a function of the number of bilayer deposited. Higher hydrophobe DPAA content of IFR-PAM results in much thicker assemblies due to hydrophobic association. The results from X-ray diffraction (XRD), atomic force microscopy (AFM), and scanning electronic microscopy (SEM) indicate that the IFR-PAM/GO ultrathin films with high homogeneity and orientation are formed by LbL assembly driven by hydrogen interaction. The thermogravimetric analysis (TGA) results indicate that the IFR-PAM/GO coating improves the thermal stability of cotton fabric. Cone calorimeter testing shows that the IFR-PAM/GO-coated fabrics become less flammable with lower peak heat release rate (PHRR) and longer time to ignition (TTI). SEM images demonstrate that the surface of the IFR-PAM/GO-coated fabrics is covered by a layer of continuous and compact char after combustion.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie301911t