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Textures and disclinations in the cholesteric liquid-crystalline phase of a cyanoethyl chitosan solution

✍ Scribed by Yanming Dong; Qing Yuan; Yong Huang

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 277 KB
Volume: 38
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(20000401)38:7<980::aid-polb8>3.0.co;2-4

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✦ Synopsis

Disclinations in the fingerprint-like cholesteric texture of a natural polymer derivative, cyanoethyl chitosan, were observed and studied by both polarizing optical microscopy and scanning electron microscopy. In the latter technique, permanganic etching was developed for this cholesteric texture to increase the contrast. A special mechanism for cholesteric phase etching is suggested and discussed. Some , , and disclinations and domain walls were observed.

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