STRUCTURAL, THERMAL AND RHEOLOGICAL STUDIES OF VIRGIN COCONUT OIL-BASED LAMELLAR LIQUID CRYSTALS FROM MIXED TWEEN 85 AND TWEEN 65

  • Norzakiatul Husna Isnolamran Universiti Pendidikan Sultan Idris
Keywords: rheological properties, lamellar liquid crystal

Abstract

The uniqueness and diversity of the liquid crystal structure have attracted many of scholars of pharmaceutical and cosmetic products to conduct intensive studies on the structure of this emulsion. In this study, VCO-based lamellar liquid crystal (VLα) from mixed tween 85 and tween 65 was synthesized via titration method. The structural, thermal and rheological studies were performed using PLM and SAXS, DSC and rheometer, respectively. The effect of VCO content and the addition of crisaborole on the entire characterization were also carried out. The maltese cross and oily textures that appear in the PLM micrographs and the SAXS spectrum confirms the presence of a lamellar phase (Lα) in the system. This Lα sample is thermally stable and pseudoplastic in nature with shear thinning behaviour. The VCO content was discovered to affect the lamellar texture and the rheological profile without having a substantial impact on thermal stability. Meanwhile the presence of crisaborole did not causing considerable disturbance to the lamellar structure. This synthesized lamellar phase accompanied by VCO as a value-added material has its own distinctive rheological behaviour, promising wide application potential such as topical application.

Published
2022-04-19
Section
Original Research Articles