Biodegradable Polymers for Microencapsulation Systems

Figure 63

SEM micrographs of collagen matrix containing poly(vinyl) alcohol microcapsules loaded with retinyl palmitate: (a)–(c) Col/PVA 1 : 1; (d)–(f) Col/PVA 1 : 10 [170].

(a)

(b)

(c)

(d)

(e)

(f)