Chitosan Derivatives/Calcium Carbonate Composite Capsules Prepared by the Layer-by-Layer Deposition Method II Stabilization of the Shell by Crosslinking

Figure 2

Transmission electron micrographs for hollow capsules with a crosslinked chitosan/chitosansulfate shell prepared by the layer-by-layer deposition method. (a) A capsule of 𝑚=5 crosslinked by HMDI, (b) 𝑚=5 crosslinked by TDI, (c) 𝑚=11 crosslinked by HMDI, and (d) m = 11 crosslinked by TDI.

(a)

(b)

(c)

(d)