121st General Meeting of the KCS

Type Symposium
Area Recent Trends in Self-healing Polymers and Composites
Room No. Room 301
Time FRI 09:00-:
Code POLY2-1
Subject Fundamental Investigation and Development of Highly Self-healable Supramolecular Materials based on Charge Transfer Complex (CTC) Interaction
Authors Sung Woo Hong
Intelligent Sustainable Materials R&D Group, Korea Institute of Industrial Technology, Korea
Abstract Over the past few years, materials exhibiting self-healability have been extensively explored as effective platform for the development of high-performance multi-functional materials for real engineering applications. Self-healable materials inspired by biological systems in which damage triggers an autonomic healing response have their built-in ability to autonomously self-repair initial damages, which prevents catastrophic failure of the materials, maintains performance of product function, improves product safety, reduces replacement costs, and extends product lifetimes. In contrast to conventional extrinsic self-healable materials like microcapsular or microvascular composites, intrinsic self-healable materials that utilize reversible crosslinking chemistry with dynamic covalent bonding or physical crosslinkage are able to undergo multiple repair cycles even upon damage at the same site. In this study, a new type of intrinsic self-healable polymeric material based on supramolecular chemistry is synthesized and its self-healing properties are examined in terms of charge transfer complex (CTC) interaction. The self-healable polymeric material in this study is prepared from polyimides, where CTC is formed through electronically complementary interaction between dianhydride and diamine groups in polyimide chains. The effective self-healing behaviors are attributed to the strong supramolecular networks resulting from both intramolecular and intermolecular CTC interactions of polyimide chains. The self-healable material based on polyimides shows excellent self-healing capabilities and fast self-healing kinetics, which explains its feasibility to be widely used for self-healing applications.
E-mail swhong@kitech.re.kr