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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
- 作者:Guobo Huang ; Jianguo Yang ; Jianrong Gao ; Xu Wang
- 刊名:Industrial & Engineering Chemistry Research
- 出版年:2012
- 出版时间:September 26, 2012
- 年:2012
- 卷:51
- 期:38
- 页码:12355-12366
- 全文大小:688K
- 年卷期:v.51,no.38(September 26, 2012)
- ISSN:1520-5045
文摘
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.
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