期刊
CELLULOSE
卷 28, 期 9, 页码 5855-5866出版社
SPRINGER
DOI: 10.1007/s10570-021-03874-y
关键词
Flame retardant; Cotton; Polyethylenimine; THPC; Coating
资金
- China Scholarship Council (CSC) [201808140038]
- State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) [GZRC 202017]
A new simple and halogen-free flame retardant treatment for cotton, using a Mannich-type reaction, shows promising results in enhancing the fabric's flame retardancy and maintaining it even after washing. The treatment is environmentally benign and has the potential to replace halogen-containing and more complex flame retardant finishing processes.
Relatively simple flame retardant finishing technologies for cotton are greatly desired in a variety of fire-sensitive applications (e.g., transportation, workwear, etc.). Many current industrial processes take advantage of halogen-containing flame retardants or require complicated processing. This study demonstrates a simple and halogen-free flame retardant treatment for cotton, which proceeds via a spontaneous Mannich-type reaction between branched polyethylenimine (PEI) and tetrakis(hydroxymethyl)phosphonium chloride (THPC). A polymer network deposited using 5 wt% THPC and 10 wt% PEI endows cotton fabric with self-extinguishing behavior during vertical flame testing. The treated cotton maintains high flame retardancy after simulated washing. This coating promotes formation of a continuous intumescent char layer, effectively protecting the cellulose matrix from fire and inhibiting the production of flammable volatiles during pyrolysis and burning. The simplicity and efficacy of this relatively environmentally-benign treatment makes it attractive for replacing halogen-containing and more complex flame-retardant finishing processes. [GRAPHICS] .
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