Polyvilylidenefluoride-based Nanocomposite Films Induced-by Exfoliated Boron Nitride Nanosheets with Controlled Orientation

조홍백; Tadachika Nakayama; 정대용; Satoshi Tanaka; Hisayuki Suematsu; Koichi Niihara; 좌용호

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자료유형: 학술저널

저자정보: 조홍백 Tadachika Nakayama 정대용 Satoshi Tanaka Hisayuki Suematsu Koichi Niihara 좌용호

저널정보: 한국복합재료학회 Composites Research Composites Research 제28권 제5호

발행연도: 2015.1

수록면: 270 - 276 (7page)

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Polyvinylidene fluoride (PVDF)-based nanocomposites are fabricated by incorporation of boron nitride (BN) nanosheets with anisotropic orientation for a potential high thermal conducting ferroelectric materials. The PVDF is dissolved in dimethylformamide (DMF) and homogeneously mixed with exfoliated BN nanosheets, which is then cast into a polyimide film under application of high magnetic fields (0.45~10 T), where the direction of the filler alignment was controlled. The BN nanosheets are exfoliated by a mixed way of solvothermal method and ultrasonication prior to incorporation into the PVDF-based polymer suspension. X-ray diffraction, scanning electron microscope and thermal diffusivity are measured for the characterization of the polymer nanocomposites. Analysis shows that BN nanosheets are exfoliated into the fewer layers, whose basal planes are oriented either perpendicular or parallel to the composite surfaces without necessitating the surface modification induced by high magnetic fields. Moreover, the nanocomposites show a dramatic thermal diffusivity enhancement of 1056% by BN nanosheets with perpendicular orientation in comparison with the pristine PVDF at 10 vol % of BN, which relies on the degree of filler orientation. The mechanism for the magnetic field-induced orientation of BN and enhancement of thermal property of PVDF-based composites by the BN assembly are elucidated.

#Polyvinylidene fluoride #Boron nitride nanosheets #Anisotropic orientation #Thermal diffusivity

참고문헌 (23)

참고문헌 신청

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