| Journal Title /掲載ジャーナル名 |
Advanced Science |
| Publication Year and Month /掲載年月 |
July, 2023 |
| Paper Title /論文タイトル |
Integrated Extrinsic and Intrinsic Self-Healing of Polysiloxane Materials by Cleavable Molecular Cages Encapsulating Fluoride Ions |
| DOI /論文DOI |
10.1002/advs.202303655 |
| Author of Waseda University /本学の著者 |
SHIMOJIMA, Atsushi(Professor, Faculty of Science and Engineering, School of Advanced Science and Engineering):Correspoinding Author, Last Author |
| Related Websites /関連Web |
– |
| Abstract /抄録 |
Self-healing ability is crucial to increasing the lifetime and reliability of materials. In this study, spatiotemporal control of the healing of a polysiloxane material is achieved using a cleavable cage compound encapsulating a fluoride ion (F−), which triggeres the dynamic rearrangement of the siloxane (Si–O–Si) networks. A self-healing siloxane-based elastomer is prepared by cross-linking polydimethylsiloxane (PDMS) with a F−-encapsulating cage-type germoxane (Ge–O–Ge) compound. This material can self-heal repeatedly under humid conditions. The F− released by hydrolytic cleavage of the cage framework contributes to rejoining of the cut pieces by promoting the local rearrangement of the siloxane networks. The use of a molecular cage encapsulating a catalyst for dynamic bond rearrangement provides a new concept for designing self-healing polysiloxane materials based on integrated extrinsic and intrinsic mechanisms. |
