화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.4, 1804-1811, July, 2014
DOI10.1016/j.jiec.2013.08.034  Export Citation
Preparation and characterization of novel polyethylene/carbon nanotubes nanocomposites with core-shell structure
Zhi Liu, Mengshan Yu, Jing Wang, Fengjiao Li, Lu Cheng, Jiangping Guo, Qigu Huang†, Yang Zhou, Baichun Zhu1, Jianjun Yi1, Yunfang Liu, and Wantai Yang
  • State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 1Lab for Synthetic Resin Research Institution of Petrochemical Technology, China National Petroleum Corporation, Beijing 100083, China
E-mail:
Preparation of novel polyethylene/carbon nanotubes (CNTs) nanocomposites with core.shell structure was presented. The method involved in situ ethylene polymerization in which nanotube surface was treated with Grignard Agent, followed by reacting with active transition metal compound, TiCl4. The multiwalled carbon nanotubes (MWCNTs) supported catalysts polymerize ethylene to form polymer nanocomposite. MWCNTs were homogeneously dispersed within polymer matrix, and as expected, the resultant nanocomposites featured core-shell structure which was confirmed by HRTEM. For the nanocomposite, the microscopic examination of the cryogenically fractured surface not only ensured a good distribution of carbon nano-particles in the PE matrix but also revealed the ductile-like fracture. The Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) were employed for the study of covalent sidewall functionalization and chemical bonding environment of MWCNTs, also indicated effective immobilization of titanium catalyst on the MWCNTs surface. The crystalline properties, dielectric property and thermal stability of the nanocomposites were determined by WAXD, impedance analyzer and TGA. The dielectric result showed a slight decline of the dielectric constant of the nanocomposites with increase of the polymerization time, and lower dielectric loss was also observed.
Keywords:Ziegler-Natta catalyst;Polyethylene;Carbon nanotube;Nanocomposite;Core-shell structure
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