Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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Na3PO4 Flame Retardant Treatment on Lyocell Fiber for Thermal Stability and Anti-oxidation Properties

라이오셀의 열 안정 및 내산화 특성 향상을 위한 Na3PO4 내염화 처리

  • Kim, Hyeong Gi (Korea Fire Safety Association) ;
  • Kim, Eun Ae (Dept. of Applied Chemistry and Biological Engineering, Chungnam National Univ.) ;
  • Lee, Young-Seak (Dept. of Applied Chemistry and Biological Engineering, Chungnam National Univ.) ;
  • In, Se Jin (Dept. of Fire and Disaster Protection Engineering, Woosong Univ.)
  • 김형기 (한국소방안전협회) ;
  • 김은애 (충남대학교 바이오응용화학과) ;
  • 이영석 (충남대학교 바이오응용화학과) ;
  • 인세진 (우송대학교 소방방재학과)
  • Received : 2015.03.10
  • Accepted : 2015.04.03
  • Published : 2015.04.30
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Abstract

The improved thermal stability and anti-oxidation properties of lyocell fiber were studied based on flame retardant treatment by using $Na_3PO_4$ solution. The optimized conditions of flame retardant treatment were studied on various concentrations of $Na_3PO_4$ and the mechanism was proposed through experimental results of thermal stability and anti-oxidation. The integral procedural decomposition temperature (IPDT), limiting oxygen index (LOI) and activation energy ($E_a$) increased 30, 160% respectively via flame retardant treatment. It is noted that thermal stability and anti-oxidation improved based on char and carbon layer formation by dehydrogenation and dissociation of C-C bond resulting the hindrance of oxygen and heat energy into polymer resin. The optimized conditions for efficient flame retardant property of lyocell fiber were provided using $Na_3PO_4$ solution and the mechanism was also studied based on experimental results such as initial decomposition temperature (IDT), IPDT, LOI and $E_a$.

라이오셀 섬유의 열 안정성과 내산화성을 향상시키기 위하여 $Na_3PO_4$ 수용액으로 내염화 처리를 실시하였다. 다양한 공정조건으로 라이오셀 섬유를 내염화 처리한 후 열 안정성과 내산화성을 측정 및 분석하고 그에 따른 메커니즘을 고찰하였다. 내염화 처리된 라이오셀 섬유의 적분 열분해 온도(integral procedural decomposition temperature, IPDT)와 활성화 에너지(activation energy, $E_a$)값은 각각 약 30, 160%로 향상된 것을 알 수 있었다. 이는 $Na_3PO_4$가 연소 시 에스테르화 반응, 탈수소화 반응 및 C-C 결합의 분해반응으로 char 형성을 촉진하여 섬유 표면에 보호층을 형성하여, 고분자 수지 내부로 산소와 열 공급을 물리적으로 차단하여 열 안정성과 내산화성이 향상된 것으로 판단된다. 이러한 결과를 바탕으로, $Na_3PO_4$ 수용액을 이용하여 열 안정성과 내산화성이 향상된 라이오셀을 제조하였고, 내염화 처리공정의 최적화된 인자 및 메커니즘을 고찰하였다.

Keywords

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