Flame-retardant Coating by Alternate Assembly of Poly(vinylphosphonic acid) and Polyethylenimine for Ramie Fabrics

作     者：Li-li Wang Tao Zhang Hong-qiang Yan 彭懋 Zheng-ping Fang Yan Li Wang Hao 

作者机构：MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationInstitute of Polymer CompositesZhejiang University Laboratory of Polymer Materials and EngineeringNingbo Institute of TechnologyZhejiang University School of Aerospace Engineering and Applied MechanicsTongji University Centre of Excellence in Engineered Fibre CompositesUniversity of Southern Queensland 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2014年第32卷第3期

页      面：305-314页

核心收录：

学科分类：0821[工学-纺织科学与工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 082102[工学-纺织材料与纺织品设计] 

基　　金：financially supported by the National Basic Research Program of China(Nos.2010CB631105 and 2011CB612307) 

主　　题：Alternative assembly Poly(vinylphosphonic acid) Flame retardant Ramie fabric. 

摘      要：A novel intumescent flame retardant coating, consisting of poly（vinylphosphonic acid） （PVPA） as the acid source and branched polyethylenimine （BPEI） as the blowing agent, was constructed on the surface of ramie fabrics by alternate assembly to remarkably improve the flame retardancy of ramie. The PVPA/BPEI coating on the surface of individual fibers of ramie fabric pyrolyzes to form protective char layer upon heating/burning and improves the flame retardancy of ramie. Thermogravimetric analysis reveals that the PVPA/BPEI-coated ramie fabrics left as much as 25.8 wt% residue at 600 ~C, while the control （uncoated） fabric left less than 1.4 wt% residue. Vertical flame test shows that all PVPA/BPEI-coated fabrics have shorter after-flame time, and the residues well preserved the original weave structure and fiber morphology, whereas, the uncoated fabric left only ashes. Microscale combustion calorimetry shows that the PVPA/BPEI coatings greatly reduce the total heat release by as much as 66% and the heat release capacity by 76%, relative to those of the uncoated fabric.