ABSTRACT
I. GENERAL INTRODUCTION The separation and concentration of materials are a very important operation with a long history of improvements and diversity. Membranes for separation and concentration possess such characteristics as expediency of operation, ad vantages in energy, lack of side reactions, a largely functional capacity, and so on, and are very noticeable over a wide variety of fields. In practice, separation membranes contribute to industrial and medical fields [1]. These membranes are also expected to serve as one of the leading materials that will act to sup port science and technology in the near future, and continual efforts are being made to develop improved functions for these membranes.
