Membrane Morphology: Phase Inversion to Electrospinning

  • Chanunpanich N. (Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut's Institute of Technology North Bangkok) ;
  • Byun Hongsik (Department of Chemical System Engineering, Keimyung University) ;
  • Kang Inn-Kyu (Department of Polymer Engineering, Kyungpook National University)
  • 발행 : 2005.06.01

초록

Recently, membrane can be prepared by two methods, phase inversion and electrospinning techniques. Phase inversion technique is a conventional but commercially preparation membrane. The most versatile of preparation in this technique is immersion of the cast film into nonsolvent bath, causing dense top layer with a finger-like pattern in the sub layer membrane. The membrane pore size getting from phase inversion is in the range of micro or submicrometer. As a result, it can be used as microfiltration and ultrafiltration applications. A new technique, electrospinning, is introduced for membrane preparation. Nonwoven nanofibrous mat or nanofibrous membrane is obtained. In this technique, electrostatic charge is introduced to the solution jet, causing a thin fiber with high surface area; hence it can be used in the applications where high surface area-to-volume or length-to-diameter ratios are required. Moreover, the pore size can be controlled by controlling the time of electrospinning. Hence, it can be used as a filter for filtering microparticles as well as nanoparticles.

키워드

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