UV-grafted gradient surface polyurethane membrane

Authors

  • Peizhong Zhao,

    Corresponding author
    1. Department of Mechanical Engineering, Qingdao Branch, Naval Academy of Aeronautical Engineering, Qingdao 266041, China
    2. Department of Chemistry and Materials, College of Science, Naval University of Engineering, Wuhan 430033, China
    • Department of Mechanical Engineering, Qingdao Branch, Naval Academy of Aeronautical Engineering, Qingdao 266041, China
    Search for more papers by this author
  • Xingyan Hua,

    1. Department of Chemistry and Materials, College of Science, Naval University of Engineering, Wuhan 430033, China
    Search for more papers by this author
  • Yuansheng Wang,

    1. Department of Chemistry and Materials, College of Science, Naval University of Engineering, Wuhan 430033, China
    Search for more papers by this author
  • Jinhua Zhu,

    1. Department of Mechanical Engineering, Qingdao Branch, Naval Academy of Aeronautical Engineering, Qingdao 266041, China
    Search for more papers by this author
  • Fei Niu

    1. Center of Analysis and Testing, College of Chemistry and Molecule, Wuhan University, Wuhan 430072, China
    Search for more papers by this author

Abstract

Gradient surfaces of polyurethane (PU) membranes were created by UV grafting approach in a graded temperature field. Acrylic acid was selected as grafting monomer to improve the hydrophilicity of the surfaces. The Fourier transform infrared spectroscope (FTIR) spectra and scanning electronic microscope (SEM) were used to characterize the gradient. The results showed that the graft yield increased gradually from the lower temperature end to the higher temperature end. As a result, the hydrophilicity of the gradient surfaces displayed a gradual change along the same direction. Water contact angle measurements also proved this point. The graft reaction rate was investigated as a function of positions along the PU membrane. The average grafting yield of PU membrane increased with the extending of UV light irradiation and increase of photo initiator dosage. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

Ancillary