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Stretching properties of xanthan and hydroxypropyl guar in aqueous solutions and in cosmetic emulsions

Abstract : Filament stretchability of xanthan gum (XG) and hydroxypropyl guar (HPG) was investigated in aqueous solutions (0.125, 0.25, 0.5, 1, 1.2 and 1.5% w/w) and in O/W emulsions using a texture analyzer. Additionally, rheological characterizations were carried out on the systems and shear and oscillation parameters were used to interpret stretching properties. XG solutions exhibited a solid-like behavior with rheological parameters much higher than for HPG one whatever the concentration. Filament stretching values of XG solutions were superior to HPG for concentration below 1% w/w and then became comparable for higher concentrations. No meaningful relationship was found between rheological and stretching values. Synergy was observed for all XG/HPG mixtures at 0.125, 0.25 and 0.5% influencing both the rheological and the filament stretching values. The 25/75 XG/HPG ratio showed the maximum synergistic effect at all concentrations while the filament stretchability was enhanced in a wider range of ratios. XG and HPG did not present the same behavior in emulsions. No clear synergistic effect was observed and XG markedly influenced the emulsion filament stretching.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02462397
Contributor : Géraldine Savary <>
Submitted on : Friday, January 31, 2020 - 11:57:53 AM
Last modification on : Tuesday, April 28, 2020 - 1:24:02 PM

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Majid Jamshidian, Géraldine Savary, Michel Grisel, Celine Picard. Stretching properties of xanthan and hydroxypropyl guar in aqueous solutions and in cosmetic emulsions. Carbohydrate Polymers, Elsevier, 2014, 112, pp.334-341. ⟨10.1016/j.carbpol.2014.05.094⟩. ⟨hal-02462397⟩

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