期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 14, 期 8, 页码 6146-6149出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2014.8457
关键词
Composite; MWCNT; Polymer Blend; Thermal Conductivity; Anisotropy
类别
资金
- Daegu University
This study focuses on MWCNT/polymer composites with flexible, anisotropic heat transporting properties. For this study, an immiscible polymer blend of MWCNT/PS and LDPE (13.5: 86.5 v: v) were used as a template. MWCNT/PS composites were first prepared by a solution process, and then melt-blended with LDPE using a brabender mixer. For achieving an alignment of MWCNT/PS in LDPE matrix, the blends of MWCNT/PS and LDPE were continuously treated under a fixed shear rate of 10 s(-1) at 210 degrees C. With partial extraction of PS in the aligned blends, FE-SEM images of the aligned blends revealed morphology of MWCNT in the PS/LDPE matrix, indicating local distribution of MWCNT selectively inside PS, where PS was elongated parallel to shear direction in LDPE matrix. The prepared MWCNT/PS and LDPE blends showed an anisotropic heat transporting behavior with anisotropic ratio of thermal conductivity (AR = lambda(x)/lambda(z)) up to 1.330 at 10 wt% of MWCNT in PS (equivalent to 1.50 wt% of MWCNT in PS/LDPE).
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