Journal of Materials Science

, Volume 42, Issue 15, pp 6234–6239 | Cite as

Study on the interfacial micro-voids of poly(vinylidene difluoride)/polyurethane blend membrane

  • Xiaoyu Hu
  • Changfa XiaoEmail author
  • Shulin An
  • Guangxia Jia


The poly(vinylidene difluoride)/polyurethane (PVDF/PU) blend membrane was prepared using the method of immersion-precipitation process. The influence of the miscibility of the two polymers on the formation of the interfacial micro-voids (IFMs) of the blend membranes was analyzed by the theory of thermodynamics and discussed with DMA, DSC and SEM. The effect of working pressure on the pure water flux (PWF) of the IFMs was also studied using membrane instrument. Results show that the IFMs are formed due to the miscibility of PVDF and PU. The existence of IFMs attributes much to the PWF of the PVDF/PU blend membrane, and the PWF of the IFMs is related not only to the miscibility of PVDF and PU but also to the deformation of IFMs under working pressure.


PVDF Differential Scanning Calorimetric Dynamic Mechanical Analysis DMAc Solubility Parameter 



The authors gratefully acknowledge the research funding provided by 973 Program (No. 2006CB708600) and the Science Council of Tianjin, China (No. 043102711).


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Xiaoyu Hu
    • 1
  • Changfa Xiao
    • 1
    Email author
  • Shulin An
    • 1
  • Guangxia Jia
    • 1
  1. 1.Key Laboratory of Hollow Fiber Membrane Materials and Membrane Process, Ministry of Education, School of Material Science and Chemical EngineeringTianjin Polytechnic UniversityTianjinChina

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