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Thermal conductivity of natural rubber nanocomposites with hybrid fillers

查看全文 作　　者：Junping [1]Song;Xiteng [1]Li;Kaiyan [1]Tian;Lianxiang [1]Ma;Wei [2]Li;Shichune [3]Yao 高影响力作者 机构地区：[1]Key Laboratory of Rubber-plastics, Ministry of Education, Shandong Provincial Key Laboratory of Rubber-plastics, Chinese and German School of Science and Technology, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China;[2]Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China;[3]Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213-3890, USA高影响力机构 出　　处：《Chinese Journal of Chemical Engineering》索引2019年第27卷第4期,共7页高影响力期刊 基　　金：Supported by the National Natural Science Foundation of China(51606107,51576102);the Collaborative Innovation Project of Green Tire and Rubber(0200501436) 摘　　要：Natural rubber nanocomposites filled with hybrid fillers of multi-walled carbon nanotubes(CNTs) and carbon black(CB) were prepared. CNTs were ultrasonically modified in mixture of hydrogen peroxide(H2O2) and distilled water(H2O). The functional groups on the surface of CNTs, changes in nanotube structure and morphology were characterized by Fourier transform infrared spectroscopy(FT-IR), Raman Spectroscopy, and transmission electron microscopy(TEM). It shows that hydroxyl(OH·) is successfully introduced. The surface defects of modified CNTs were obviously higher than those of original CNTs, and the degree of agglomeration was greatly reduced. Thermal conductivity of the composites was tested by protection heat flow meter method. Compared with unmodified CNTs/CB filling system, the thermal conductivity of hybrid composites is improved by an average of 5.8% with 1.5 phr(phr is parts per hundred rubber) of hydroxyl CNTs and 40 phr of CB filled. A three-dimensional heat conduction network composed of hydroxyl CNTs and CB, as observed by TEM, contributes to the good properties. Thermal conductivity of the hybrid composites increases as temperature rises. The mechanical properties of hybrid composites are also good with hydroxyl CNTs filled nanocomposites;the tensile strength, 100% and 300% tensile stress are improved by 10.1%, 22.4% and 26.2% respectively. 关 键 词：Modified CARBON NANOTUBE CARBON black HYBRID FILLER Natural rubber Thermal CONDUCTIVITY
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