부산대학교 도서관

Cellulose is the most abundant natural polymer on our earth, and its derivatives are well-known to exhibit cholesteric liquid crystal (CLC) phase by their chemical modification. In this presentation, we report on novel mechanical stress sensing applications by the CLC elastomer films with visible Bragg reflection prepared from crosslinkable cellulosic derivatives. Such cellulosic derivatives were synthesized by simply esterification with both vinyl and alkyl groups in their side chains. Photoirradiation of the cellulosic derivatives with UV light brought about intermacromolecular photo-crosslinking reaction between the terminal unsaturated bonds, resulting in simple fabrication of flexible CLC elastomer films with unique capabilities to visualize mechanical stress to objective materials through the reflection color changes.