Development of High-Strength Self-supporting Supramolecular Membranes by SCAT Polymerization and Their Application as Gas-Selective Separation Membranes

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05192
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 35020:Polymer materials-related
• Research Institution: Kitami Institute of Technology
• Principal Investigator: Namikoshi Takeshi 北見工業大学, 工学部, 准教授 (30452072)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 超分子 / 光環化反応 / ポリフェニルアセチレン / ビニルエーテル

Outline of Final Research Achievements

This study is the development of a method for the preparation of supramolecular self-supporting membranes by photocyclization of polyphenylacetylene membranes (SCAT), which can be used for the synthesis of supramolecular membranes on a practical scale.The aim of this study is to increase the strength of self-supporting supramolecular membranes by utilizing the polymerization reaction of vinyl ethers (VE) in the poly(phenylacetylene) backbone that occurs together with the SCAT reaction.
The precursor polymers were synthesized by changing the number and position of VEs in the DHPA-type monomer that can undergo the SCAT reaction.The SCAT reaction of these precursor polymers consumed the VE groups of the self-supporting supramolecular membrane, resulting in a supramolecular membrane that is insoluble in organic solvents and successfully produced a supramolecular membrane with higher strength than conventional supramolecules.

Free Research Field

機能性高分子合成

Academic Significance and Societal Importance of the Research Achievements

ポリマーは分解性が乏しく環境汚染の原因となる。一方、超分子は低分子の自己組織化（ボトムアップ）で調製され容易に分解可能、分子デザインにより機能化でき、新たな機能性膜材料として期待される。しかし、超分子膜の強度は低く、低分子のボトムアップでは巨大な膜の調製は難しく実用化の例はない。
申請者は高分子膜のSCAT反応を用い、高分子の環化分解による低分子化(トップダウン)で超分子膜を調製する方法を見出し、高分子膜サイズのまま超分子膜化でき巨大な膜が容易に調製できる。また、SCAT反応と同時に起こるVE基の重合反応を見出し、学術的意義は非常に高く、工業的な利用に向け膜の巨大化ができ社会的意義も非常に高い。