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

Li-li Wang; Tao Zhang; Hong-qiang Yan; Mao Peng; Zheng-ping Fang; Yan Li; Wang Hao

doi:10.1007/s10118-014-1408-y

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

Updated：2021-06-21

- Flame-retardant Coating by Alternate Assembly of Poly(vinylphosphonic acid) and Polyethylenimine for Ramie Fabrics
- Chinese Journal of Polymer Science Vol. 32, Issue 3, Pages: 305-314(2014)
- Affiliations：
  
  a.MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Institute of Polymer Composites, Zhejiang University, Hangzhou 310027, China
  b.Laboratory of Polymer Materials and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
  c.School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
  d.Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba Qld 4350, Australia
- Author bio：
  
  **Mao Peng (彭懋), E-mail: pengmao@zju.edu.cn
- Funds：
- DOI：10.1007/s10118-014-1408-y
  CLC：
- Received：07 May 2013，
  
  Revised：2013-08-01，
  
  Accepted：14 August 2013，
  
  Published：2014-03
- Accepted：
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Li-li Wang, Tao Zhang, Hong-qiang Yan, et al. 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.
DOI：

Li-li Wang, Tao Zhang, Hong-qiang Yan, et al. 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. DOI： 10.1007/s10118-014-1408-y.

摘要

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 ℃

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.

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