Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Structure and Mechanical Properties of Thermoplastic Composites Using Microcrystalline Cellulose Nanofibers

미세결정 셀룰로스 나노섬유를 이용한 열가소성 복합재료의 구조와 물성

  • Lee, Jin Ah (Department of Textile Convergence of Biotechnology & Nanotechnology, Korea Institute of Industrial Technology) ;
  • Yoon, Min Ji (Department of Textile Convergence of Biotechnology & Nanotechnology, Korea Institute of Industrial Technology) ;
  • Kim, Ki-Young (Department of Textile Convergence of Biotechnology & Nanotechnology, Korea Institute of Industrial Technology) ;
  • Lim, Dae Young (Department of Textile Convergence of Biotechnology & Nanotechnology, Korea Institute of Industrial Technology)
  • 이진아 (한국생산기술연구원 바이오나노섬유융합연구그룹) ;
  • 윤민지 (한국생산기술연구원 바이오나노섬유융합연구그룹) ;
  • 김기영 (한국생산기술연구원 바이오나노섬유융합연구그룹) ;
  • 임대영 (한국생산기술연구원 바이오나노섬유융합연구그룹)
  • Received : 2013.10.26
  • Accepted : 2013.12.09
  • Published : 2013.12.31
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Abstract

In this study, cellulose nanofibers (CNFs), that is, nanosized cellulose fibers, are manufactured from micro-crystalline cellulose (MCC) by using a high-pressure homogenizer. The CNFs are used as reinforcing materials for thermoplastic composites. Polyamide (PA6) and polylactic acid (PLA) fibers are employed as the matrix in the thermoplastic composites. With an increase in the operation pass number and pressure of the homogenizer, the specific surface area (SSA) of the CNFs increases and the crystalline index (CI) decreases. After 30 passes of MCC through the homogenizer, the SSA increases from $257.2m^2/g$ to $787.1m^2/g$, and the CI decreases from 0.78 to 0.70. The tensile strength of the CNF/PA6 composite is higher than that of the CNF/PLA composite. On the other hand, the modulus of the CNF/PLA composite is higher than that of the CNF/PA6 composite. As the CNF content in the composite increases, the total thickness of composite decreases but the tensile strength increases. The CNF/PA6 (3:7) composite has the maximum tensile strength (21.5 MPa) among the samples considered in this study.

Keywords

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