Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers
Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers
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DOI：
10.1007/s10973-015-4903-7
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发表时间：
2015
影响因子：
4.4
通讯作者：
Feng Zhang;Qiuying Li;Yujin Liu;Shijie Zhang;Chifei Wu;Weihong Guo
中科院分区：
文献类型：
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作者：
Feng Zhang;Qiuying Li;Yujin Liu;Shijie Zhang;Chifei Wu;Weihong Guo
研究了炭黑(CB)、多壁碳纳米管(MWCNTs)和膨胀石墨(EG)填充聚碳酸酯(PC)复合材料的导热性能。在相同载荷下，与CB和MWCNTs相比，填充到PC基质中的Eg填料具有更大的导热系数增强。为了进一步提高PC复合材料的导热性能，采用了EG/MWCNTs混杂填料。当混合填充量为10%时，EG：MWCNTs的比例为9：1，且PC复合材料的导热系数最大值为1.19W/m−1K−1，表明EG与MWCNTs的复合对PC的导热性能有协同作用。当−1K−1的填充量为40%时，制备了导热系数为5 W/m的Eg/MWCNTs/PC复合材料，这将拓宽其在电子、LED灯具和航空航天等领域的应用。
The thermal conductivities of polycarbonate (PC) composites filled with carbon fillers, including carbon black (CB), multi-walled carbon nanotubes (MWCNTs) and exfoliated graphite (EG), were studied. EG filler provided substantially greater thermal conductivity enhancement when embedded into PC matrix compared with CB and MWCNTs at the same loading. To further improve the thermal conductivity of PC composite, a hybrid EG/MWCNTs filler was used. When the hybrid filler loading was 10 mass%, the radio of EG: MWCNTs was 9:1, and the thermal conductivity of PC composite showed a maximum value of 1.19 W m−1K−1higher than that filled with EG or MWCNTs alone, indicating that the combination of EG and MWCNTs demonstrated a synergistic effect for the thermal conductivity enhancement of PC. EG/MWCNTs/PC composite with thermal conductivity >5 W m−1K−1was fabricated when the filler content was 40 mass%, which would widen its field of applications in electrons, LED lamps and aerospace.