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Fire Sci. Eng. > Volume 29(2); 2015 > Article
Fire Science and Engineering 2015;29(2):25-32.
DOI: https://doi.org/10.7731/KIFSE.2015.29.2.025    Published online April 30, 2015.
라이오셀의 열 안정 및 내산화 특성 향상을 위한 Na3PO4 내염화 처리
김형기, 김은애, 이영석, 인세진
1한국소방안전협회
2충남대학교 바이오응용화학과
3충남대학교 바이오응용화학과
4우송대학교 소방방재학과
Na3PO4 Flame Retardant Treatment on Lyocell Fiber for Thermal Stability and Anti-oxidation Properties
Kim Hyeong Gi, Kim Eun Ae, Lee Young-Seak, In Se Jin
1Korea Fire Safety Association
2Dept. of Applied Chemistry and Biological Engineering, Chungnam National Univ.
3Dept. of Applied Chemistry and Biological Engineering, Chungnam National Univ.
4Dept. of Fire and Disaster Protection Engineering, Woosong Univ.
요약
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.
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 $E_a$.
Key Words: Lyocell fabrics, Flame retardant treatment, Thermal stability, Anti-oxidation, Thermo-gravimetric analysis
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