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Research for Mechanical Properties of Wet Nonwoven Fabric Based on Recycled Carbon Fiber Using Cellulose Nanofibrils

셀룰로스 나노피브릴을 이용한 재활용 탄소섬유 습식부직포의 기계적 물성 연구

  • Youn, Chulmin (Advanced Textile R&D Department, Korea Institute of Industrial Technology) ;
  • Bae, Young Hwan (Advanced Textile R&D Department, Korea Institute of Industrial Technology) ;
  • Kim, Woo Sik (Fibrous Ceramics & Aerospace Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Yeo, Sang Young (Advanced Textile R&D Department, Korea Institute of Industrial Technology)
  • 윤철민 (한국생산기술연구원 섬유융합연구부문) ;
  • 배영환 (한국생산기술연구원 섬유융합연구부문) ;
  • 김우식 (한국세라믹연구원 세라믹섬유.항공소재센터) ;
  • 여상영 (한국생산기술연구원 섬유융합연구부문)
  • Received : 2021.01.29
  • Accepted : 2021.02.17
  • Published : 2021.02.28

Abstract

Carbon fiber is an advanced material widely used in high-tech industries because of its light weight, heat resistance, chemical resistance, excellent mechanical properties, and electrical and thermal conductivity. However, carbon fibers also have high production costs and limited disposal methods (e.g., landfills). Research is being conducted to address these problems through the recycling of carbon fibers. Among the representative recycled carbon fiber products, wet nonwoven fabrics have limitations in their mechanical properties because their structure simply consists of stacked microsized-diameter carbon fibers and a binder. In this study, the tensile strength was improved by adding cellulose nanofibrils (CNFs) during the manufacturing of wet nonwoven fabrics by mixing short-cut carbon fibers and a binder (short-cut PVA fibers). CNF bundles improve the mechanical properties by forming a complex structure via the crosslinking of carbon fibers and short PVA fibers. The tensile strength of nonwoven fabrics consisting of short carbon fibers and PVA fibers was determined to be 92 gf. On the other hand, the tensile strength of the nonwoven fabric with 10% CNF added to the binder increased by approximately 20 times to 1,808 gf. The composite with nanofiber was confirmed to be effective in forming a structure with high mechanical properties when fabricating microfiber-based nonwoven fabrics.

Keywords

References

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