Biodegradable Polymers for Microencapsulation Systems

Figure 25

Example of complex coacervation involving (i) emulsification of oil in an aqueous solution containing two different polymers, (ii) initial coacervation of polymers after lowering the solution pH below the isoelectric point of protein, (iii) deposition of the polymers on the surface of the oil, and (iv) wall hardening by addition of a cross-linking agent. [90].