Performance of flame retardancy silk modified with water-soluble vinyl phosphoamide

Authors

  • Jinping Guan,

    Corresponding author
    1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
    2. National Engineering laboratory for Modern silk, Soochow University, Suzhou, Jiangsu 215123, China
    • College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
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  • Guoqiang Chen

    1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
    2. National Engineering laboratory for Modern silk, Soochow University, Suzhou, Jiangsu 215123, China
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Abstract

In this article, a water-soluble flame retardant monomer dimethyl(methacryloyloxyethyl)phosphoramidate (DMMEPN) was synthesized and applied onto silk fabric via graft copolymerization technique initiated with potassium persulfate (KPS). The results of attenuated total reflection infrared spectroscopy (ATR), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) indicated that DMMEPN was successfully grafted onto silk fiber surface. X-ray diffraction (XRD) patterns showed that grafting process didn't change the crystalline structure of silk fibers and the reaction mainly occurred at the amorphous region of silk fibers. DMMEPN grafted silk fabric exhibited self-extinguish property when ignited with a candle like fire with LOI of 32.38% and could pass vertical flammability test with char length of 42 mm. Thermal gravimetric analysis showed that grafted silk fibers had different thermal decomposition mode with control silk fibers and tended to produce more char after combustion. This article also investigated the physical properties like whiteness index, hygroscopicity, and tensile strength of grafted silk fabrics. The results showed that physical properties had some loss but had no negative effect on final uses. Laundering durability test demonstrated treated silk fabrics still showed flame retardancy after enduring 30 hand wash cycles. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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