Effect of mixed cellulose ester membrane structure on appearance of cholesteric blue phases

Masayoshi Ojima, Takeshi Noma, Hiroaki Asagi, Akihiko Fujii, Masanori Ozaki, Hirotsugu Kikuchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Temperature range of cholesteric blue phase (BP) was expanded by infiltrating liquid crystal (LC) that exhibits blue phases into mixed cellulose ester membrane (MCEM). The expansion of the BP temperature range was induced by pinning effect on the network surfaces of membrane. In particular, the temperature range of BP I in the LC/MCEM composite is four times wider than that of pure BP LC compound. Solvent treatment of MCEM with aqueous solution of ethanol leads thinner network of MCEM and bigger expansion of BP I temperature range. Polarizing microscopic observations and reflection spectrum measurements of the expanded BP have been carried out. Cooling rate dependence of the BP temperature range was also investigated, which indicated that the expansion of the BP temperature range upon infiltrating LC into MCEM was induced by the pinning effect at network surfaces in the MCEM.

Original languageEnglish
Pages (from-to)1361982-1421988
Number of pages60007
JournalMolecular Crystals and Liquid Crystals
Volume512
DOIs
Publication statusPublished - Sep 1 2009

Fingerprint

membrane structures
Membrane structures
cellulose
esters
Liquid Crystals
Cellulose
Esters
membranes
Membranes
Liquid crystals
liquid crystals
Temperature
expansion
temperature
Composite membranes
cellulose ester plastic
Ethanol
ethyl alcohol
Cooling
aqueous solutions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Effect of mixed cellulose ester membrane structure on appearance of cholesteric blue phases. / Ojima, Masayoshi; Noma, Takeshi; Asagi, Hiroaki; Fujii, Akihiko; Ozaki, Masanori; Kikuchi, Hirotsugu.

In: Molecular Crystals and Liquid Crystals, Vol. 512, 01.09.2009, p. 1361982-1421988.

Research output: Contribution to journalArticle

Ojima, Masayoshi ; Noma, Takeshi ; Asagi, Hiroaki ; Fujii, Akihiko ; Ozaki, Masanori ; Kikuchi, Hirotsugu. / Effect of mixed cellulose ester membrane structure on appearance of cholesteric blue phases. In: Molecular Crystals and Liquid Crystals. 2009 ; Vol. 512. pp. 1361982-1421988.
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