Figure 5

Surface morphology of microencapsulated preparations under SEM. The dried sample placed was placed on conductive adhesive and coated with gold using a sputter coater for 45 s. In the CA-NPV samples, shriveling due to water evaporation during the sample preparation process was observed. Observations of CS@CANPV and WP@CA-NPV revealed that the electrostatic self-assembled microcapsules were more complete and more spherical than single-layer microcapsules. The 1,2-dihydroxybenzene and amino groups in the structure of dopamine self-oxidized and polymerized on almost any solid surface to form a dopamine coating that adhered tightly to the surface of the microcapsule.