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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/112077
Title: 
Minimum Evaporation Model of Dermatological Delivery Systems. Lamellar Liquid Crystal Formulations Containing Brazilian Nut (Bertholletia excelsa HBK) Vegetable Oil and Guarana Glycolic Extract
Author(s): 
Institution: 
  • Universidade Federal de São Paulo (UNIFESP)
  • Univ Metodista Piracicaba
  • Universidade Estadual Paulista (UNESP)
  • NTNU
ISSN: 
0193-2691
Sponsorship: 
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Abstract: 
Formulations with lyotropic liquid crystals were prepared from a Brazilian nut vegetable oil, guarana extract and combination of sorbitan monooleate (Span 80) and sorbitan monolaurate ethoxylate EO 20 (Tween 20) in the ratio 1: 3 (surfactant component) and their physical-chemical aspects and rheological properties were determined. Compositions with liquid crystals were found in the pseudoternary diagram in a surfactant range of 70-90% and polarized light microscopy, small-angle x-ray scattering (SAXS) showed them to be lamellar. The preparations were furthermore characterized rheologically by shear stress shear rate sweeps finding plastic and pseudoplastic behavior without thixotropy. Electric conductivity and pH measurements demonstrated a potential for future application as dermatological delivery system of the active compounds in the Bertholletia excelsa and Paullinia cupana.
Issue Date: 
1-Jan-2014
Citation: 
Journal Of Dispersion Science And Technology. Philadelphia: Taylor & Francis Inc, v. 35, n. 8, p. 1191-1199, 2014.
Time Duration: 
1191-1199
Publisher: 
Taylor & Francis Inc
Keywords: 
  • Cosmetics
  • dermatological formulations
  • liquid crystals
  • rheology
  • vegetable oils
Source: 
http://dx.doi.org/10.1080/01932691.2013.826586
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/112077
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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