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2018 Fiscal Year Final Research Report

Cholesteric elastomer films with temperature responsive surface with periodical undulation

Research Project

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Project/Area Number 16K14080
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Polymer/Textile materials
Research InstitutionKyoto Institute of Technology

Principal Investigator

Urayama Kenji  京都工芸繊維大学, 材料化学系, 教授 (20263147)

Project Period (FY) 2016-04-01 – 2019-03-31
Keywords液晶 / 液晶高分子 / 高分子液晶 / コレステリック液晶 / エラストマー / ゴム / 液晶エラストマー / 液晶ゴム
Outline of Final Research Achievements

We focus on thermal response of the surface profile for cholesteric elastomer membranes that have the helical axis along the surface. The surface of the elastomers have periodical undulation responsive to temperature change. Temperature change drives a variation in the orientation degree of local director in the helical director configuration, resulting in a change in the degree of surface undulation. We correlate the temperature-induced variations in the degrees of surface undulation and local director orientation. We successfully explains the thermal variation of surface undulation on the basis of the lamination model of planar nematic elastomers with continuous rotation of nematic director using the thermal elongation/contraction data of them.

Free Research Field

高分子物性

Academic Significance and Societal Importance of the Research Achievements

周期的ならせん配向パターンをもつ液晶エラストマーを用いて,周期的な表面起伏をもつゴム膜を作製した。この表面起伏は温度によって変化し,平坦状態や,山と谷が反転した凹凸パターンも含まれる。異種材料と接着させる場合など,接着面積が温度によって大きく変化することになるので,温度変化によってスムーズに接着と剥離が行えるゴム膜としての応用が考えられる。また,コレステリック液晶エラストマーの物性として,周期的な表面起伏の熱応答性に着目した研究例はなく,学術的な意義も大きい。

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Published: 2020-03-30  

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