title: Rheological characterization of O/W emulsions incorporated with neutral and charged polysaccharides.
abstract: The effects of polysaccharides, including xyloglucan from Hymenaea courbaril (XG), galactomannans from Schizolobium parahybae (GMSP) and Mimosa scabrella (GMMS), xanthan gum (XT), sodium hyaluronate (HNa) and Fucogel(®) (FG), on the rheological behavior of cosmetic emulsions were evaluated. These incorporations gave rise to six emulsified systems, denoted XGE, GMSPE, GMMSE, XTE, HNaE and FGE, respectively. The emulsion consistency was found to follow the trend GMSPE>XGE>HNaE>FGE>XTE>GMMSE. In general, the addition of polysaccharides increased the viscoelastic properties of the emulsions and decreased the creep compliance. The neutral polysaccharides (GMSPE, GMMSE) led to better stability of the emulsions after storing for 20 days relative to charged polymers. It was found that polysaccharides XG, GMSP and GMMS, which come from the seeds of native Brazilian plant species, might be used to modify the flow properties and stabilities of oil-water emulsions.
authors: Department of Biochemistry and Molecular Biology, Federal University of Paraná, Polytechnic Center, PO Box 19046, 81531-990 Curitiba, PR, Brazil.
authors: Ricardo Padilha
authors: RP
authors: Vianna-Filho
authors: Carmen Lúcia Oliveira
authors: CL
authors: Petkowicz
authors: Joana Léa Meira
authors: JL
authors: Silveira
mesh_terms: D001696:Biomechanical Phenomena; D003358:Cosmetics / Q000737:chemistry; D004655:Emulsions / Q000737:chemistry; D005690:Galactose / Q000031:analogs & derivatives; D005936:Glucans / Q000737:chemistry*; D006820:Hyaluronic Acid / Q000737:chemistry; D052597:Hymenaea / Q000737:chemistry; D008351:Mannans / Q000737:chemistry*; D031298:Mimosa / Q000737:chemistry; D011135:Polysaccharides, Bacterial / Q000737:chemistry; D012212:Rheology / Q000379:methods*; D012639:Seeds / Q000737:chemistry; D055672:Static Electricity; D055682:Viscoelastic Substances / Q000737:chemistry; D014990:Xylans / Q000737:chemistry*
chemical_list: D003358:Cosmetics; D004655:Emulsions; D005936:Glucans; D008351:Mannans; D011135:Polysaccharides, Bacterial; D055682:Viscoelastic Substances; D014990:Xylans; C487014:fucogel; C012990:galactomannan; C029353:xyloglucan; D006820:Hyaluronic Acid; C002563:xanthan gum; D005690:Galactose