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Stabilization by chitosan of soybean oil emulsions coated with phosphilipid and glycocholic acid
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1993 (English)In: Colloids and Surfaces, ISSN 0166-6622, E-ISSN 1873-4340, Vol. 71, p. 187-195Article in journal (Refereed)
Abstract [en]

The interaction between chitosan, a cationic polyelectrolyte having a pKa of about 6.2, and emulsified lipids been measured as a function of pH by electrophoretic mobility. The strongest adsorption of chitosan has been observed on emulsion droplet surfaces stabilized with sodium glycocholic acid (bile salt) mixed with phosphatidyl choline pH of about 5. The forces acting between layers Or chitosan adsorbed on negatively charged solid surfaces (mica) measured as a function Or pH. From these measurements it is clear that, al low pH, the adsorption of cationic chitosan on to the negatively charged mineral surface results in a charge reversal. When the pH is increased (without changing the adsorbed amount), the charge passes through zero, and, at higher pH values, a negative charge develops. The range of the steric force was used to describe the structure of the adsorbed chitosan layer at different pH values. The flocculation behaviour of an emulsion stabilized by phospholipid and bile salt emulsifiers and adsorbed chitosan been rationalized by considering the forces acting between negatively charged solid surfaces coated with a chitosan layer.

Place, publisher, year, edition, pages
1993. Vol. 71, p. 187-195
Keywords [en]
Chitosan, glychocholic acid, phospholipid, soybean oil emulsion
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26389OAI: oai:DiVA.org:ri-26389DiVA, id: diva2:1053391
Note
A808Available from: 2016-12-08 Created: 2016-12-08 Last updated: 2017-11-29Bibliographically approved

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