• Title/Summary/Keyword: Se protection layer

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Flame Retardant and Thermal Properties of Wood-based Composite Boards Prepared by Graphene Nanoplatelet/Reused Phenolic Foam (그래핀나노플레이트렛 및 재활용 페놀폼으로 제조된 목재기반 복합보드의 난연 및 열적 특성)

  • Han, Jeong-In;Kim, Min-Ji;Song, Eun Ji;Kim, Kyung Hoon;In, Se-Jin;Lee, Young-Seak
    • Applied Chemistry for Engineering
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    • v.30 no.3
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    • pp.371-378
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    • 2019
  • Graphene nanoplatelet (GnP)/reused phenolic foam (re-PF)/wood composite boards were fabricated with different GnP content as 5, 10 and 20 w/w% to investigate the effect of GnP on thermal- and flame retardant properties of wood-based composite boards. The thermal- and flame retardant properties of fabricated composite boards were investigated by thermogravimetric analysis (TGA) and limiting oxygen index (LOI), respectively. The thermal stability of the composite boards increased proportionally with respect to the amount of GnP, and the char yield of these boards increased up to 22% compared to that of the pure wood board. The LOI values of composite boards were about 4.8~7.8% higher than those of using pure wood boards. It was also confirmed that the flame retardant properties of composite boards were remarkably improved by the addition of re-PF and GnP. These results were because of the fact that the re-PF and GnP with a high thermal stability delayed the initial thermal degradation temperature of composite boards and made their char layers denser and thicker which led the overall combustion delay effect of the composite board. Especially, GnP as a carbon-based material, facilitated the char layer formation and increased remarkedly the char yield, which showed higher effect on flame retardant properties than those of the re-PF.

Effects of NaCl/H3PO4 Flame Retardant Treatment on Lyocell Fiber for Thermal Stability and Anti-oxidation Properties (NaCl/H3PO4 내염화 처리가 라이오셀 섬유의 열 안정 및 내산화 특성에 미치는 영향)

  • Kim, Eun Ae;Bai, Byong Chol;Jeon, Young-Pyo;Lee, Chul Wee;Lee, Young-Seak;In, Se Jin;Im, Ji Sun
    • Applied Chemistry for Engineering
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    • v.25 no.4
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    • pp.418-424
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    • 2014
  • The improved thermal stability and anti-oxidation properties of Lyocell fiber were studied based on flame retardant treatment by using NaCl/$H_3PO_4$ solution. The optimized conditions of flame retardant treatment were studied on various maxing ratio of NaCl and $H_3PO_4$ and the mechanism was proposed through experimental results of thermal stability anti-oxidation. The IPDT (integral procedural decomposition temperature), LOI (limited oxygen index) and $E_a$ (activation energy) increased 23, 30 and 24% 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 NaCl/$H_3PO_4$ solution and the mechanism was also studied based on experimental results such as IDT (initial decomposition temperature), IPDT, LOI and $E_a$.

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;Kim, Eun Ae;Lee, Young-Seak;In, Se Jin
    • Fire Science and Engineering
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    • v.29 no.2
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    • pp.25-32
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    • 2015
  • 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 $E_a$.