Figure 12.

Microscopic photographs of KGM microspheres prepared by different feeding modes of EC: S5 was KGM emulsions before crosslinking and S5-Crosslinking 1 (EC was added slowly at 60 °C), S5-Crosslinking 2 (emulsions were stirred at 60 °C for 1 h and then EC was added), S5-Crosslinking 3 (EC solution (20 wt %, EC was mixed with oil phase adequately) was added in one batch at 60 °C) and S5-Crosslinking 4 (EC was added at 40 °C and then the temperature was increased to 60 °C) were the crosslinking results of S5.