개요

  • HOME
  • 출판물
  • 한국섬유공학회지
  • 개요
  • Prev.
    한국섬유공학회지, Vol.56, No.5, pp. 321-326, 2019
    마그네타이트로 표면 개질된 질화붕소의 자기장 배향이 폴리우레탄 기반 유·무기 하이브리드의 열전도성에 미치는 영향
    Effect of Magnetic Orientation of Boron Nitride Modified with Magnetite on the Thermal Conductivity of Polyurethane-Based Organic-Inorganic Hybrids
     
    김영수 · 윤관한 · 이승한 · 민병길
     
    The organic–inorganic hybrids of polyurethane (PU) and boron nitride (BN) modified with magnetite (Fe3O4) were prepared to investigate the effect of BN orientation under a magnetic field for enhancing the thermal conductivity of PU. The introduction of magnetite could be proved through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). It was observed that the magnetite nanoparticles of 10−100 nm covered the BN surface. The thermal conductivity of the hybrids showed an increasing trend as the BN content increased. The hybrid containing 60 wt% of BN modified with magnetite without magnetic orientation exhibited a thermal conductivity that was 3.8 times higher than that of the neat PU. However, the same hybrid with a magnetic orientation exhibited thermal conductivity that was 10 times higher than that of the neat PU. Conclusively, the effect of the magnetite BN orientation under the magnetic field on the thermal conductivity was found to be very effective by forming a thermal path of BN platelet along the magnetic field direction in the hybrids.
     
    Keywords : polyurethane, thermal conductivity, boron nitride, magnetic orientation, magnetite
    DOI : https://doi.org/10.12772/TSE.2019.56.321
     
    Full text(PDF) : 회비를 납부하고 로그인하세요.