ESEM showed that except for pores required for cell culture, there were large proportion of mini-epore, supplied for nurtrition and metabolic product transportation.

• 冷冻干燥法制得的泡沫含有适宜的孔径，孔隙率大，除大孔之外还有高比例微孔，且微孔之间相互贯通而适于细胞培养。