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Stream/Area:
-
Subject:
-
Paper ID:
10.55041/IJSREM.ISTCESD026
Volume:
10 |
9 |
Sep 2026
Pages:
1-5
Publication Frequency:
Monthly (12 issues per year)
License:International Journal of Scientific Research in Engineering and Management follows the Creative Commons Attribution 4.0 (CC BY 4.0) License, allowing free use and distribution with proper attribution.
Department of Physics,
Shivneri Mahavidyalaya Shirur Anantpal Dist. Latur (MS) India
Polymer–liquid crystal composites have attracted considerable interest because they can overcome several limitations associated with pure liquid crystals, including high threshold voltage, poor contrast, and limited stability. These materials have potential applications in display devices, light shutters, and smart windows. In the present study, polyvinyl alcohol (PVA) was incorporated into cholesteryl palmitate, a cholesteric liquid crystal, at different concentrations using a chemical dispersion method. The optical behaviour of the pure and PVA-dispersed liquid crystals was examined using polarizing optical microscopy (POM) and Fabry–Perot scattering studies (FPSS). Their dielectric properties were investigated using an impedance analyser. A comparative analysis revealed that the incorporation of PVA improved the stability and overall performance of the cholesteric liquid crystal. The observed changes in optical and electrical behaviour suggest that PVA–cholesteryl palmitate composites may be promising materials for electro-optical applications.
KEYWORDS
The present study examined the optical and dielectric behaviour of polyvinyl alcohol (PVA)-dispersed cholesteryl palmitate, with emphasis on the effect of polymer concentration on the mesomorphic and electrical properties of the cholesteric liquid crystal. Fabry–Perot spectroscopic measurements revealed noticeable changes in phase-transition temperatures with the incorporation of PVA, confirming its influence on the molecular organization of the liquid-crystal system. Polarizing optical microscopy further demonstrated distinct textural changes, including fan-like, honeycomb, schlieren, and smectic A textures, depending on composition and temperature. The dielectric investigation using Cole–Cole analysis showed significant variation in dielectric constant and dielectric loss among pure PLC, AA, and BB composites. In particular, the AA composition exhibited comparatively low dielectric loss, indicating reduced dielectric dissipation and stable electrical behaviour. Overall, PVA incorporation effectively modifies the structural, optical, and dielectric characteristics of cholesteryl palmitate. The obtained results indicate that PVA–CLC composites have potential for applications in electro-optical and optical switching devices.
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Publication Date
9/28/2026
Peer Review Type
Double-Blind Peer Review
Review Rounds: 2
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