Structure and permeability of A-B-A-type block copolymer membranes consisting of poly(.ALPHA.-amino acid) and polysiloxane.

DOI Web Site
  • NAKASHIMA Toshio
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • KINOSHITA Takatoshi
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • TAKIZAWA Akira
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • TSUJITA Yoshiharu
    Department of Materials Science and Engineering, Nagoya Institute of Technology

Bibliographic Information

Other Title
  • ポリアミノ酸とポリシロキサンから成るＡ‐Ｂ‐Ａ型トリブロック共重合体膜の構造と低分子透過性
  • ポリアミノサン ト ポリシロキサン カラ ナル A-B-Aガタ トリ ブロック

Search this article

Description

A-B-A-type block copolymer (MSiM) membranes consisting of poly (γ-methyl L-glutamate) (PMLG, A component) and polydimethylsiloxane (PDMS, B component) have been prepared. Their structure-CO2 permeability relationships have been investigated. Phase separation between α-helical PMLG and PDMS components has occurred in MSiM membranes, at the interface between the two phases, random-coil structure was induced in the PMLG component. As a result, the sorption behavior of CO2 in MSiM membranes can be explained in terms of the additivity between the solubility of CO2 in the three phases in the membranes: two phases of PMLG (α-helix and random-coil domains) and a PDMS phase. In the PMLG rich MSiM membranes, containing greater than 70vol% PMLG component, the solubility and diffusibility of CO2 decreased with increasing random-coil content of PMLG component. On the other hand, with increasing PDMS content, the permeability of MSiM membrane significantly increased, e. g., the CO2 permeability coefficient of MSiM membrane containing 54vol% PMLG became one order larger than those of the PMLG rich MSiM membranes. Further, MSiM membranes containing greater than 70 vol% PMLG component showed relatively high values (3.5-4.4) of oxygen/nitrogen separation factors.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 47 (5), 415-423, 1990

    The Society of Polymer Science, Japan

Keywords

Details 詳細情報について

Report a problem

Back to top