Pinning Effect of Mixed Cellulose Ester Membrane on Appearance of Cholesteric Blue Phases
Pinning Effect of Mixed Cellulose Ester Membrane on Appearance of Cholesteric Blue Phases
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DOI：
10.1143/apex.2.021502
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发表时间：
2009-02
影响因子：
2.3
通讯作者：
M. Ojima;Takeshi Noma;Hiroaki Asagi;A. Fujii;M. Ozaki;H. Kikuchi
中科院分区：
文献类型：
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作者：
M. Ojima;Takeshi Noma;Hiroaki Asagi;A. Fujii;M. Ozaki;H. Kikuchi
通过将含有胆红素蓝相(BP I)和胆红素蓝相(BP II)的液晶(LC)渗透到混合纤维素酯膜(MCEM)中，扩大了BP I的温度范围。研究了BP I温度范围与冷却速率的关系，结果表明，LC渗入MCEM时，BP温度范围的扩展是由MCEM中网络表面的钉扎效应引起的。特别是，在0.2-µm MCEM中渗透的BP I的温度范围比纯BP LC化合物宽8倍。此外，还考察了膨胀剂的孔尺寸依赖性。
Temperature range of cholesteric blue phase I (BP I) was expanded by infiltrating liquid crystal (LC) that exhibits BP I and BP II into a mixed cellulose ester membrane (MCEM). Cooling rate dependence of the BP I temperature range was investigated, which indicated that the expansion of BP temperature range upon infiltrating LC into MCEM was induced by the pinning effect at network surfaces in the MCEM. In particular, the temperature range of BP I infiltrated in 0.2-µm MCEM is eight times wider than that of pure BP LC compound. Pore size dependence of expansions was also investigated.