Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Magnetic Nanofiber with Shape Memory Properties by Coaxial Electrospinning of Core/Sheath Structure

동축 전기방사를 이용한 Core/Sheath 구조의 자성 나노섬유 제조 및 특성 평가

  • Choi, Wonseok (Department of Materials Science and Engineering, Seoul National University) ;
  • Hong, Kyung Hwa (Department of Fashion Design and Merchandising, Kongju National University) ;
  • Kang, Tae Jin (Department of Materials Science and Engineering, Seoul National University)
  • 최원석 (서울대학교 공과대학 재료공학부) ;
  • 홍경화 (공주대학교 자연과학대학 의류상품학과) ;
  • 강태진 (서울대학교 공과대학 재료공학부)
  • Received : 2012.12.22
  • Accepted : 2013.02.01
  • Published : 2013.02.28
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Abstract

A magnetorheological fluid(MR fluid) is a type of smart fluid in a carrier fluid, usually a type of oil. When subjected to a magnetic field, the fluid greatly increases its apparent viscosity, to the point of becoming a viscoelastic solid. And, Shape-memory polyurethane(SMPU) is a kind of polymeric smart materials that have the ability to return from a deformed state to their original shape induced by an external stimulus, such as temperature change. In this study, the multi-functional fiber webs showing magnetorheological(MR) property under magnetic field and shape memory(SM) effect by heat were prepared by coaxial electrospinning process. The fibers were designed to consist of two part; core part, SMPU+MRF and sheath part, SMPU. Consequently, we found that ca. 10 wt% MRF+15 wt% SMPU solution is most suitable for core part dope solution, and 17 wt% SMPU solution is most suitable for sheath part dope solution. Through scanning electron microscope(SEM) and transmission electron microscope(TEM), we observed stable core/sheath structure in the fiber of the electrospun web. From the dynamic mechanical analyzer(DMA) result to investigate the shape recovery ability of the fibe webs by heat, we discovered reasonable shape recovery property from the electrospun fiber web. Also, they showed MR effect under magnetic field through universal testing machine(UTM) test.

Keywords

References

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