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| Flame-retardant Coating by Alternate Assembly of Poly（vinylphosphonic acid） and Polyethylenimine for Ramie Fabrics | |
| 引用本文： | 彭懋.Flame-retardant Coating by Alternate Assembly of Poly（vinylphosphonic acid） and Polyethylenimine for Ramie Fabrics[J].高分子科学,2014,32(3):305-314. |
| 作者姓名： | 彭懋 |
| 作者单位： | [1]MOE Key Laboratory of Macromolecular Synthesis and Funetionalization, Institute of Polymer Composites Zhejiang University, Hangzhou 310027, China [2]Laboratory of Polymer Materials and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China [3]School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China [4]Centre of Excellence in EngineeredFibre Composites, University of Southern Queensland, Toowoomba Qld 4350, Australia |
| 基金项目： | This work was financially supported by the National Basic Research Program of China （Nos. 2010CB631105 and 2011CB612307）. |
| 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. |
| 关 键 词： | 苎麻织物 阻燃涂层 聚乙烯亚胺 烯基膦酸 面料 组装 膨胀型阻燃剂 涂覆织物 |
Flame-retardant coating by alternate assembly of poly(vinylphosphonic acid) and polyethylenimine for ramie fabrics |
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| Li-li Wang,Tao Zhang,Hong-qiang Yan,Mao Peng,Zheng-ping Fang,Yan Li,Wang Hao.Flame-retardant coating by alternate assembly of poly(vinylphosphonic acid) and polyethylenimine for ramie fabrics[J].Chinese Journal of Polymer Science,2014,32(3):305-314. | |
| Authors: | Li-li Wang Tao Zhang Hong-qiang Yan Mao Peng Zheng-ping Fang Yan Li Wang Hao |
| Institution: | 1. MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Institute of Polymer Composites, Zhejiang University, Hangzhou, 310027, China 2. Laboratory of Polymer Materials and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China 3. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, 200092, China 4. Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, Qld, 4350, Australia |
| Abstract: | 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. |
| Keywords: | Alternative assembly Poly（vinylphosphonic acid） Flame retardant Ramie fabric |
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