Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Alkali Treatment Effect of Kenaf Fibers on the Characteristics of Kenaf/PLA Biocomposites

Kenaf 섬유의 알칼리처리가 Kenaf/PLA 바이오복합재료의 특성에 미치는 영향

  • Seo, Jeong Min ;
  • Cho, Donghwan (Polymer, Bio-Composite Research Lab, Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Park, Won Ho (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
  • 서정민 (한국신발.피혁연구소) ;
  • 조동환 (금오공과대학교 고분자공학과) ;
  • 박원호 (충남대학교 유기소재.섬유시스템공학과)
  • Received : 2008.10.31
  • Accepted : 2008.12.09
  • Published : 2008.12.30
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Abstract

In the present study, kenaf fibers were treated with sodium hydroxide using soaking and ultrasonic methods prior to biocomposite processing, respectively. The effect of alkali treatment on the kenaf-PLA interfacial adhesion and mechanical and thermal characteristics of kenaf/poly(lactic acid) biocomposites was investigated in terms of their interfacial shear strength, flexural properties, dynamic mechanical properties and thermal stability and also microscopic observations of kenaf fibers and the composite fracture surfaces. As a result, use of both soaking and ultrasonic methods for treating kenaf fiber surfaces played a role in increasing the fiber-matrix adhesion and the mechanical properties of the biocomposites. Their characteristics depended not only on the fiber surface treatment method but also on the treatment condition like alkali concentration and treatment time.

본 연구에서는 바이오복합재료 성형 전에 침지방법과 초음파방법을 이용하여 수산화나트륨 용액으로 kenaf 섬유를 처리하였다. Kenaf/poly(lactic acid)의 kenaf-PLA 계면접착력과 기계적, 열적 특성에 미치는 알칼리처리의 영향을 계면전단강도, 굴곡강도, 동역학적 열특성 및 열안정성을 조사하였으며, kenaf 섬유와 복합재료 파단면을 관찰하였다. 그 결과 Kenaf 섬유표면을 처리하기 위한 침지방법과 초음파방법 모두 바이오복합재료의 섬유-매트릭스 접착과 기계적 특성을 증가시키는 역할을 하는 것으로 조사되었다. 바이오복합재료의 특성은 섬유표면 처리방법뿐만 아니라 알칼리 농도 및 처리시간에도 의존하였다.

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