Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (2): 427.doi: 10.7503/cjcu20130631

• Polymer Chemistry • Previous Articles     Next Articles

Preparation and Properties of Surface Modified Nano-Ni Particles with n-Hexadecylphosphonic and Its Composites

SHANG Guangyuan, LI Ming*()   

  1. State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2013-07-08 Online:2014-02-10 Published:2013-09-17
  • Contact: LI Ming E-mail:lim@mail.tsinghua.edu.cn

Abstract:

Through the modification of nano-Ni particles with n-hexadecylphosphonic acid(HDPA) as surface modifier, Ni/HDPA hybrid particles were prepared. Composite of polypropylene(PP) and Ni/HDPA was prepared by solution blending. The dispersion of Ni in PP, the compatibility and stability of Ni and PP, the dielectric performance of composite were discussed. The X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD) and transmission electron microscope(TEM) results showed the surface morphology of Ni/HDPA, while the fracture surface morphology and the dielectric properties of composite were demonstrated by scanning electron microscope(SEM) and the dielectric spectrum analysis system. It is found that a coverage layer, which is 2—4 nm thick, of n-hexadecylphosphonic can be formed on the surface of nano-Ni. In the presence of the coverage layer, nano-Ni was changed from hydrophilicity into lipophilicity, in results of which the Ni/HDPA disperses well in the PP matrix. At the Ni/HDPA volume fraction of 40%, permittivity of composite can be as high as 10 times of pure PP.

Key words: Nano-Ni, n-Hexadecylphosphonic acid, Surface modification, Polymer matrix composite

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