News Column

Researchers from Sichuan University Report Details of New Studies and Findings in the Area of Composite Materials

May 27, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Composite Materials have been published. According to news reporting out of Chengdu, People's Republic of China, by VerticalNews editors, research stated, "In this work, different contents of the organoclay (0.05-0.25 wt%) were introduced into the polycarbonate/poly(vinylidene fluoride)/carbon nanotube (PC/PVDF/CNT) blend composites by diluting the master batches of the PC/organoclay and the PVDF/CNT through melt-compounding in an internal mixer. In the blend composites, the weight fraction ratio between PC and PVDF was maintained at 40/60, and the content of the CNTs was varied from 0.1 to 0.5 wt%."

Our news journalists obtained a quote from the research from Sichuan University, "The morphologies of the blend composites and the dispersion states of the nanofillers were characterized using scanning electron microscope and transmission electron microscope. Differential scanning calorimetry was used to investigate the crystallization behaviors of different blend composites so that the selective localization of the CNTs could be proved further. The results showed that with the presence of the CNTs and/or the organoclay, the blend composites showed the apparent morphological change from a typical sea-island structure to the quasi-cocontinuous structure. Specifically, at the organoclay content of 0.1 wt%, most of the CNTs selectively located at the blend interface. The electrical resistivity was measured and the results showed that organoclay showed apparent influence on the electrical resistivity of the blend composites. Namely, the volume resistivity decreased with increasing organoclay content until a minimum value was achieved, then it increased gradually with further increasing organoclay content. Specifically, all the blend composites exhibited the minimum electrical resistivity at the 0.1 wt% organoclay."

According to the news editors, the research concluded: "Furthermore, a very small percolation threshold of the CNTs (0.06 wt%) was achieved in this work, which was attributed to the selective localization of the CNTs at the blend interface."

For more information on this research see: Effect of organoclay on morphology and of PC/PVDF/CNT blend composites electrical conductivity. Composites Science and Technology, 2014;94():30-38. Composites Science and Technology can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; Composites Science and Technology -

Our news journalists report that additional information may be obtained by contacting J. Chen, Sichuan University, Analyt & Testing Center, Chengdu 610065, People's Republic of China. Additional authors for this research include H.Y. Lu, J.H. Yang, Y. Wang, X.T. Zheng, C.L. Zhang and G.P. Yuan.

Keywords for this news article include: Asia, Chengdu, Composite Materials, People's Republic of China

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Source: Journal of Technology