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Formaldehyde-Free Durable Flame-Retardant Finish of Cotton Using Hexachlorocyclophosphazene and Triethanolamine

  • Textile Coloration and Finishing
  • Abbr : Text. Color. and Finish.
  • 2020, 32(3), pp.150-157
  • DOI : 10.5764/TCF.2020.32.3.150
  • Publisher : The Korean Society Of Dyers And Finishers
  • Research Area : Engineering > Fiber Engineering > Dyeing Engineering
  • Received : August 28, 2020
  • Accepted : September 17, 2020
  • Published : September 27, 2020

Jeong-Hwan Kim 1 Jang, Jin-Ho 1

1금오공과대학교 화학소재공학부

Accredited

ABSTRACT

Hexachloro-cyclophosphazene(HCCP), a formaldehyde-free flame retardant (FR), was steam-cured with triethanol amine(TEA) to impart durable flame-retardancy to cotton fabrics. While the HCCP treatment alone showed very limited resistance to repeated laundering cycles, the addition of TEA substantially improved the laundering durability of the FR cotton up to twenty laundering cycles. The extended washing resistance was accomplished by the increased nucleophilic substitution of unreacted P-Cl groups in HCCP by the TEA resulting in the more densely crosslinked FR networks. With increasing molar ratio of TEA to the HCCP up to 2, the flame retarding effectivity and the synergistic effectiveness improved to 2.8 and 1.8 respectively. TGA and microscale combustion calorimetry verified the pyrolysis and combustion behaviors of the FR-cotton, which showed lower maximum pyrolysis and combustion temperatures together with substantially decreased peak pyrolysis and heat release rate, synergistically yielding larger amounts of carbonaceous chars. The formaldehyde-free HCCP and TEA can be a durable FR finishing agents for cotton fabrics acting through a solid-phase flame-retarding mechanism.

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This paper was written with support from the National Research Foundation of Korea.