Uniform Chitosan Microparticles Prepared by a Novel Spray-Drying Technique

Figure 7

SEM photographs of chitosan microparticles spray dried under different inlet temperatures: (a)120^∘C, (b)140^∘C, (c) 160^∘C, and (d)180^∘C (1.0 wt% chitosan solution, storage time: 0 day).

(a)

(b)

(c)

(d)