SÍNTESE E CARACTERIZAÇÃO DE SURFACTANTES ALQUILFENIL POLIGLICOSÍDICOS A PARTIR DA AMILOSE E ALQUIL FENÓIS EXTRAÍDOS DO LCC NATURAL
AUTOR(ES)
França, Francisco C. F. de, Coelho, Ethanielda de L., Uchôa, Antônia F. J., Rodrigues, Francisco H. A., Ribeiro, Maria E. N. P., Soares, Sandra de A., Ricardo, Nágila M. P. S.
FONTE
Quím. Nova
DATA DE PUBLICAÇÃO
2016-08
RESUMO
The surfactants were synthesized by condensing the obtained oligosaccharides of amylose and alkyl phenols extracted from the natural cashew nut shell liquid (nCNSL). The Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR) data showed aromatic ring bands, glycosidic rings, olefins and paraffins. The Nuclear Overhauser Effect Spectroscopy (NOESY) experiments showed that the conformation of the glycosidic units is of the type 4C1 with an α anomeric configuration. The values of Gibbs free energy of micellization (ΔGºmic) indicate that the spontaneity of formed micelles are cardanyl oligoglycosides > cardyl oligoglycosides > anacardyl oligoglycosides. The surface tension (γ) measurements showed that critical micelle concentration (cmc) values were low for surfactants. The study γ versus lnc (g dm-3) indicated that the aggregation behavior of the surfactants is dependent on their structural characteristics, as well as their thermal behavior. The area per molecule (A) values indicates that cardyl oligoglycosides are likely to form aggregates smaller than cardanyl oligoglycosides and anacardyl oligoglycosides. The critical packing parameter (cpp) indicates that the aggregates are of the vesicles and bilayers.
Documentos Relacionados
- Novos surfactantes alquil poliglicosídicos à base de amilose extraída da batata inglesa (Solanum tuberosum L.)
- SÃntese e caracterizaÃÃo de surfactantes glicosÃdicos a partir da amilose e alquil fenÃis extraÃdos do LCC.
- Síntese e caracterização de poliisoprenos oh-telequélicos a partir da borracha natural
- SÃntese e caracterizaÃÃo de Surfactantes Alquil GlicosÃdicos derivados da amilose extraÃda da batata inglesa (Solanum Tuberosum L.)
- Síntese e caracterização de hemiceluloses catiônicas, a partir do reaproveitamento da palha de milho