کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1604920 1516204 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synergistic enhancement of thermal conductivity in composites filled with expanded graphite and multi-walled carbon nanotube fillers via melt-compounding based on polymerizable low-viscosity oligomer matrix
ترجمه فارسی عنوان
افزایش هم افزایی هدایت حرارتی در کامپوزیت های پر شده با گرافیتی کسترده و پرکننده های نانولوله های کربنی چندجداره با استفاده از ترکیب ذوب بر اساس ماتریس الگورمور با کمترین ویسکوزیته پلیمریزاسیون
کلمات کلیدی
مواد کامپوزیتی؛ انتقال حرارت؛ تجزیه و تحلیل حرارتی؛ طیف سنجی اشعه ایکس
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• We proposed a novel melt-compounding based on a polymerizable low-viscosity oligomer.
• Dispersion of the second multi-walled carbon nanotubes was improved by the method.
• Synergistic enhancement in thermal conductivity of composite was found by the method.
• Construction of thermally conductive pathways was the most important physical factor.
• X-ray computed tomography was suitable for evaluation of the conductive pathways.

We found that the thermal conductivity of the polycarbonate (PC) composite filled with both 9.9 wt% expanded graphite (EG) and 0.1 wt% multi-walled carbon nanotube (MWCNT) fillers was synergistically improved by 49% compared to that of the PC composite filled with 10 wt% EG alone. In order to induce the optimal internal structure favorable for thermal conduction by enhancing the dispersion of the second MWCNT fillers, we applied a two-step melt-compounding to fabricate composites using a MWCNT masterbatch based on a polymerizable oligomer resin, cyclic butylene terephthalate (CBT), which is characterized by ultra-low viscosity and excellent impregnability during initial melting. Three-dimensional (3D) non-destructive characterization using X-ray micro computed tomography (micro-CT) was utilized to demonstrate the synergistic enhancement and to verify dispersion and 3D thermal network of the fillers in the composites accurately. The synergistic enhancement was significantly affected by the formation of the efficient thermally conductive pathways and dispersion of the second MWCNT fillers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 690, 5 January 2017, Pages 274–280
نویسندگان
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