New natural polysaccharide carbohydrate derivatives of sodium alginate surfactants were prepared by condensation of sodium bisulfite onto the polysaccharide linkages at different hydrophobic chain of Fatty acids. We were synthesis and solution properties of hydrophobi-cally modified alginate-ester derivatives in which dodecyl or octadecyl chains were grafted onto the polysaccharide backbone via ester functions. In semi-dilute aqueous solution, intermolecu-lar hydrophobic associations result in the formation of physical networks, the physico-chemical properties of which can be controlled through polymer concentration, hydrophobic chain content and non-chaotropic salts such as sodium chloride. Alginate is a biomaterial widely used in the food industry as thickener and in biotechnological applications including cell encapsulation, protein delivery or tissue engineering. Alginate is a negatively charged polysaccharide obtained from marine algae and various bacteria, with solution properties ranging from viscous to gel-like structures in the presence of divalent cations. In this study, the structure of final products was confirmed by FT-IR and ~1H-NMR. The interfacial properties were evaluated by surface tension, foaming properties and conductivity. The result showed that the novel material is capable of encapsulating both hydrophilic and hydrophobic molecules. Crucially, the all-important gelling and non-toxic properties of native alginate have been retained.
展开▼
