Use of reflectance anisotropy spectroscopy for mapping the anisotropy of lyotropic liquid crystal dispersions in formulations

Prescott, Elizabeth M, Rabone, Kenneth L, Smith, Caroline I ORCID: 0000-0001-6878-0697 and Weightman, Peter ORCID: 0000-0002-0907-3930 (2016) Use of reflectance anisotropy spectroscopy for mapping the anisotropy of lyotropic liquid crystal dispersions in formulations. LIQUID CRYSTALS TODAY, 25 (4). pp. 70-73. ISSN 1358-314X, 1464-5181

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Abstract

Lyotropic liquid crystal dispersions have commercial importance in the formulation of cleaning products and pharmaceuticals. The anisotropy of such dispersions is an important aspect of their properties and a simple method for measurement would be valuable to formulators. The relatively new optical technique of reflectance anisotropy spectroscopy (RAS) was considered to have potential in this respect. To test the idea, the anisotropy of a binary mixture of an anionic surfactant Aerosol OT (AOT) and glycerol (used as a model for water) was investigated using RAS. The variation in the measured anisotropy parallels the expected behaviour of a dispersion of lyotropic liquid crystals as a function of concentration and temperature. A response surface of anisotropy generated as a function of temperature and surfactant concentration demonstrates the use of RAS as a tool for mapping liquid anisotropy to facilitate the formulation of structured liquids.

Item Type:	Article
Additional Information:	peerreview_statement: The publishing and review policy for this title is described in its Aims & Scope. aims_and_scope_url: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=tlcy20
Uncontrolled Keywords:	Anisotropy, response surface, reflectance anisotropy spectroscopy, di-octyl sulphosuccinate
Depositing User:	Symplectic Admin
Date Deposited:	07 Feb 2017 09:21
Last Modified:	07 Dec 2024 08:43
DOI:	10.1080/1358314X.2016.1242253
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3004311