SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (4): 928-934.DOI: 10.1016/j.cjche.2018.09.019

• Energy, Resources and Environmental Technology • Previous Articles     Next Articles

Thermal conductivity of natural rubber nanocomposites with hybrid fillers

Junping Song1, Xiteng Li1, Kaiyan Tian1, Lianxiang Ma1, Wei Li2, Shichune Yao3   

  1. 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
  • Received:2018-04-23 Revised:2018-08-07 Online:2019-06-14 Published:2019-04-28
  • Contact: Junping Song
  • Supported by:
    Supported by the National Natural Science Foundation of China (51606107, 51576102), and the Collaborative Innovation Project of Green Tire and Rubber (0200501436).

Thermal conductivity of natural rubber nanocomposites with hybrid fillers

Junping Song1, Xiteng Li1, Kaiyan Tian1, Lianxiang Ma1, Wei Li2, Shichune Yao3   

  1. 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
  • 通讯作者: Junping Song
  • 基金资助:
    Supported by the National Natural Science Foundation of China (51606107, 51576102), and the Collaborative Innovation Project of Green Tire and Rubber (0200501436).

Abstract: 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.

Key words: Modified carbon nanotube, Carbon black, Hybrid filler, Natural rubber, Thermal conductivity

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