9Han, Dang Keun, et al., Preparation method of biodegradable porous polymer scaffolds having an Aimproved cell compatibility for tissue engineering: United States Patent, 20040043135 [P] .2(102.
10Zhu K J, Song B H, Yang S L. Super microcapcules (SMS) Ⅰ Preparation and characterization of star polyethylene oxide (PEO) -polylactic acide (PLA) copelymers [ J ]. Polym Chem, 1998, 27: 2151-2153.