スメクティック液晶の電場による流動特性の変化(S23-4 複雑流体の流れとその応用(4),S23 複雑流体の流れとその応用)

概要

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We have investigated the ER characteristics in smectic phase of a liquid crystal utilizing a parallel-plate type rheometer. The yield stress was evaluated in τ-sweep experiments. Under some electric field strengths, the yield stress was almost same as that obtained under non electric filed. In the DC electric fields above the threshold, the yield stress was increased and then saturated. An opposite trend was obtained in AC electric fields. It is considered that the smectic multi-domain structure would maintain against the shear stress and it became more aligned and stronger structure under the higher DC electric fields. But, the AC electric field would loosen the structure because of alternate electric moment on the molecule etc.
一般社団法人日本機械学会の論文
2004-09-04