Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Fundamental Properties of Electrospun Polylactic Acid/Cellulose Nanocrystal Composite Mats

전기방사를 이용한 PLA/CNC 복합 매트의 기초 특성

  • Jo, Yu-Jeong (Department of Forest Products, Korea Forest Research Institute) ;
  • Lee, Sun-Young (Department of Forest Products, Korea Forest Research Institute) ;
  • Chun, Sang-Jin (Department of Forest Products, Korea Forest Research Institute)
  • 조유정 (국립산림과학원 임산공학부) ;
  • 이선영 (국립산림과학원 임산공학부) ;
  • 전상진 (국립산림과학원 임산공학부)
  • Received : 2015.02.27
  • Accepted : 2015.05.12
  • Published : 2015.07.25
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Abstract

In this study, nanocomposite mats consisting of cellulose nanocrystals (CNCs) and poly(lactic acide) (PLA) were electrospun from a suspension mixture consisting of tetrahydrofuran at room temperature. Morphology study showed that fibers of electrospun composite mats were aligned in three dimensional surface along the fiber long-axis. Average diameter of the electrospun fibers decreased with an increase in the CNC loading level. Tensile strength of the electrospun fibers mat decreased with an increase in the CNC loading level because of bead formation in the formed fibers and low interfacial bond strength between PLA and CNC. Meanwhile, thermal stability of the electrospun nanocomposite mats was effectively improved as the amount of CNC increased.

본 연구에서는 바이오 매스기반의 셀룰로오스 나노크리스탈(cellulose nanocrystals, 이하 CNC)과 PLA (polylactic acid, 이하 PLA)를 tetrahydrofuran (THF)에 용해시킨 서스펜션으로부터 PLA 및 PLA/CNC 나노섬유 복합재 매트를 상온에서 전기방사법으로 제작하였다. PLA 및 PLA/CNC 나노복합재 매트의 형상은 섬유가 긴축을 따라 3차원 구조의 표면으로 정렬된 것으로 관찰되었다. PLA 및 PLA/CNC 나노섬유 복합재 매트의 인장강도는 CNC 함량이 증가할수록 감소하였는데, 이는 전기방사된 섬유 속에 형성된 비드와 PLA와 CNC의 낮은 계면접착력 때문으로 기인된다. PLA/CNC 복합재 매트를 구성하는 섬유의 평균 지름 크기는 CNC의 함량이 증가할수록 작아졌다. 한편 PLA/CNC 나노섬유 복합재 매트의 열안정성은 CNC의 함량이 증가할수록 증가하는 것을 보였다.

Keywords

References

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