Rheological characterization of polysaccharide–surfactant matrices for cosmetic O/W emulsions

Bais, D.; Trevisan, A.; Lapasin, Romano; Partal, P.; Gallegos, C.

doi:10.1016/j.jcis.2005.04.044

Cited by 94 publications

(46 citation statements)

References 29 publications

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“…These results will be analyzed along with adsorption data. Cellulose (2011) 18:291-308 297 It was observed that macromolecules of polymer and surfactant particles can form complexes (Bais et al 2005;Goddard 2001;Kuhn et al 1998). These complexes are the effect of electrostatic, hydrophobic or/and hydrogen bonding interactions.…”

Section: Resultsmentioning

confidence: 99%

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Grządka

2011

Cellulose

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The adsorption of carboxymethylcellulose (CMC) in the presence or absence of the surfactants: anionic SDS, nonionic Triton X-100 and their mixture SDS/TX-100 from the electrolyte solutions (NaCl, CaCl 2 ) on the alumina surface (Al 2 O 3 ) was studied. In each measured system the increase of CMC adsorption in the presence of surfactants was observed. This increase was the smallest in the presence of SDS, a bit larger in the presence of Triton X-100 and the largest when the mixture of SDS/Triton X-100 was used. These results are a consequence of formation of complexes between the CMC and the surfactant particles. Moreover, the dependence between the amount of surfactants' adsorption and the CMC initial concentration was measured. It comes out that the surfactants' adsorption amount is not dependent on the CMC initial concentration and moreover, it is unchanged in the whole measured concentration range. The influence of kind of electrolyte, its ionic strength as well as pH of a solution on the amount of the CMC adsorption at alumina surface was also measured. The amount of CMC adsorption is larger in the presence of NaCl than in the presence of CaCl 2 as the background electrolyte. It is a result of the complexation reaction between Ca 2? ions and the functional groups of CMC belonging to the same macromolecule. As far as the electrolyte ionic strength is concerned the increase of CMC adsorption amount accompanying the increase of electrolyte ionic strength is observed. The reason for that is the ability of electrolyte cations to screen every electrostatic repulsion in the adsorption system. Another observation is that the increase of pH caused the decrease of CMC adsorption. The explanation of this phenomenon is connected with the influence of pH on both dissociation degree of polyelectrolyte and kind and concentration of surface active groups of the adsorbent.

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Section: Resultsmentioning

confidence: 99%

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Grządka

2011

Cellulose

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“…The region where G′ (the storage modulus) is independent of applied shear stress up to the critical strain value (γ c ) is known as the LVE region. 20 …”

Section: Rheological Measurementsmentioning

confidence: 99%

Effect of compositions in nanostructured lipid carriers (NLC) on skin hydration and occlusion

Loo¹,

Basri²,

Ismail³

et al. 2012

IJN

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Purpose:To study the effects of varying lipid concentrations, lipid and oil ratio, and the addition of propylene glycol and lecithin on the long-term physical stability of nanostructured lipid nanocarriers (NLC), skin hydration, and transepidermal water loss. Methods: The various NLC formulations (A1-A5) were prepared and their particle size, zeta potential, viscosity, and stability were analyzed. The formulations were applied on the forearms of the 20 female volunteers (one forearm of each volunteer was left untreated as a control). The subjects stayed for 30 minutes in a conditioned room with their forearms uncovered to let the skin adapt to the temperature (22°C ± 2°C) and humidity (50% ± 2%) of the room. Skin hydration and skin occlusion were recorded at day one (before treatment) and day seven (after treatment). Three measurements for skin hydration and skin occlusion were performed in each testing area. Results: NLC formulations with the highest lipid concentration, highest solid lipid concentration, and additional propylene glycol (formulations A1, A2, and A5) showed higher physical stability than other formulations. The addition of propylene glycol into an NLC system helped to reduce the particle size of the NLC and enhanced its long-term physical stability. All the NLC formulations were found to significantly increase skin hydration compared to the untreated controls within 7 days. All NLC formulations exhibited occlusive properties as they reduced the transepidermal water loss within 7 days. This effect was more pronounced with the addition of propylene glycol or lecithin into an NLC formulation, whereby at least 60% reduction in transepidermal water loss was observed. Conclusion: NLCs with high lipid content, solid lipid content, phospholipid, and lecithin are a highly effective cosmetic delivery system for cosmetic topical applications that are designed to boost skin hydration.

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“…Nonionic polymers usually show only slight interactions with nonionic and cationic surfactants and can be conveniently employed for the preparation of stable cosmetic O/W emulsions since both polymer and surfactant mixtures can contribute independently and positively to the stabilization of the dispersed phase (Bais, Trevisan, Lapasin, Partal, & Gallegos, 2005). Scleroglucan is not toxic and does not alter blood or living tissues; when applied to skin or eyes it does not cause sensitization.…”

Section: Introductionmentioning

confidence: 99%

Rheology of Laponite-scleroglucan hydrogels

Lapasin

Abrami

Grassi

et al. 2017

Carbohydrate Polymers

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a b s t r a c tBoth Laponite and scleroglucan can find several applications in various fields (from industrial to biomedical one) in virtue of their peculiar features and rheological properties displayed in aqueous phases. Structural states of Laponite dispersions strongly depend on concentration and ionic strength. When attractive and repulsive interparticle interactions are so effective that they lead to arrested states (attractive gel or repulsive glass), the rheological behavior of the dispersion undergoes a sharp transition, from quasi-Newtonian to markedly shear thinning and viscoelastic. Conversely, scleroglucan solutions gradually change to weak gels with increasing polymer concentration. The present work is concerned with aqueous Laponite-scleroglucan mixed systems, obtained according to different preparation modes, and is aimed at examining how much the content and proportion of both components affect the viscoelastic and flow properties of the mixed system.

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Rheological characterization of polysaccharide–surfactant matrices for cosmetic O/W emulsions

Cited by 94 publications

References 29 publications

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Effect of compositions in nanostructured lipid carriers (NLC) on skin hydration and occlusion

Rheology of Laponite-scleroglucan hydrogels

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