ICCAS OpenIR
Relaxation Processes in sheared films of ethyl-cyanoethyl cellulose cholesteric liquid crystalline solutions
Wang, L; Huang, Y
2003-09-01
Source PublicationLIQUID CRYSTALS
ISSN0267-8292
Volume30Issue:9Pages:1129-1137
AbstractThe relaxation processes in sheared films of ethyl-cyanoethyl cellulose [(E-CE)C]/acrylic acid (AA) cholesteric liquid crystalline (LC) solutions were studied by polarizing optical microscopy (POM) and UV-Vis spectrophotometry. Under shearing normal to the helix axis and above the critical shear rate, the planar texture arrangement of the (E-CE)C/AA cholesteric LC solution was destroyed and transformed to the nematic phase. Observed by POM, the banded texture formed quickly following the cessation of the shear, but it was unstable and disappeared after several minutes. The reflection spectrum of the sheared (ECE)C/AA cholesteric LC solution film was recorded as a function of relaxation time. It was found that the selective reflection property was lost under the shear, but the shape of the reflection spectrum recovered quickly with cessation of the shear, and the reflection peak in the spectrum became sharper with time, returning to the original form before shearing. A proposed model of the structural transformation during the relaxation was confirmed by additional optical measurement and transmission electron microscopy.
DOI10.1080/02678290310001599279
Indexed BySCI
Language英语
WOS IDWOS:000185014100013
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80464
Collection中国科学院化学研究所
Corresponding AuthorHuang, Y
Affiliation1.Chinese Acad Sci, Guangzhou Inst Chem, Lab Cellulose & Lignocellulos Chem, Guangzhou 510650, Peoples R China
2.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, L,Huang, Y. Relaxation Processes in sheared films of ethyl-cyanoethyl cellulose cholesteric liquid crystalline solutions[J]. LIQUID CRYSTALS,2003,30(9):1129-1137.
APA Wang, L,&Huang, Y.(2003).Relaxation Processes in sheared films of ethyl-cyanoethyl cellulose cholesteric liquid crystalline solutions.LIQUID CRYSTALS,30(9),1129-1137.
MLA Wang, L,et al."Relaxation Processes in sheared films of ethyl-cyanoethyl cellulose cholesteric liquid crystalline solutions".LIQUID CRYSTALS 30.9(2003):1129-1137.
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