| Characterization of yield stress and slip behavior of skin/hair care gels using steady flow and LAOS measurements and their correlation with sensorial attributes. | |
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MedLine Citation:
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PMID: 22268865 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Gels made with three different polymers widely used as rheology modifiers in cosmetic formulations (crosslinked poly(acrylic acid), crosslinked poly(maleic acid-alt-methyl vinyl ether) copolymer, and crosslinked poly(acrylic acid-co-vinyl pyrrolidone) copolymer) were characterized by rheological and sensory evaluation methods to determine the relationship between sensorial perception and corresponding rheological parameters. Both conventional rheological characterization methods and a more recent method, Fourier Transform Rheology with Large Amplitude Oscillatory Flow data (LAOS), were utilized to characterize the material with and without wall slip. Sensorial analyses were implemented in-vivo to evaluate the perceived ease of initial and rub-out spreadability, cushion, pick-up, and slipperiness attributes of the gels. Results were statistically analyzed by both variance (ANOVA) and principle component analysis (PCA). Sensorial panel testing characteristics discriminated the three materials and PCA analyses revealed that sensory attributes could be well predicted by rheological methods. Rheological experiments, without wall slip, revealed that gel strength in the linear viscoelastic region (LVR) and yield stress of these materials are similar, but exhibit significantly different wall slip and thixotropy behavior in the low shear rate region under wall slip conditions. Above the critical shear rate, which corresponds to the yield stress, all tested materials did not slip and behaved as conventional, shear-thinning polymeric fluids. In particular, the rheological parameters and sensorial perception of the 1% crosslinked vinyl pyrrolidone/acrylic acid copolymer were significantly affected by wall slip and/or thixotropy related shear banding phenomena. © 2012 ISP Investments Inc ICS © 2012 Society of Cosmetic Scientists and the Société Française de Cosmétologie. |
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Authors:
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Seher Ozkan; Tim W Gillece; Larry Senak; David J Moore |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-23 |
Journal Detail:
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Title: International journal of cosmetic science Volume: - ISSN: 1468-2494 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8007161 Medline TA: Int J Cosmet Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2012 ISP Investments Inc ICS © 2012 Society of Cosmetic Scientists and the Société Française de Cosmétologie. |
Affiliation:
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Material Science Group, Global R&D, Ashland Specialty Ingredients, 1361 Alps Road, Wayne, NJ, US, 07470. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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