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以聚(甲基丙烯酸甲酯甲基丙烯酸)[P(MMAMAA)]为主要微球材质,两亲性聚(乳酸聚乙二醇)二嵌段共聚物(PELA)为辅助材质,通过复乳液滴模板法结合溶剂去除法,制备了微米尺度贯穿孔道结构的超大孔P(MMAMAA)微球,考察了油相中材质浓度、内水相盐浓度、复乳演变时间等对微球形态及孔道结构的影响,分析了微球表面孔隙的演变机理.在P(MMAMAA)浓度100g/L和PELA浓度30～40g/L、外水相PVA浓度25g/L、内水相NaCl浓度1～5g/L、乳液熟化时间0～30min的条件下,可制备出形态较好的超大孔微球,微球的表面孔径可达数微米,孔隙率最高可达95%.超大孔微球形成后,对其骨架进行共价交联,可形成刚性微球骨架.
Poly (methyl methacrylate methacrylate) [P (MMAMAA)] as the main microsphere material, amphiphilic poly (lactic acid polyethylene glycol) diblock copolymer (PELA) as an auxiliary material, (MMAMAA) microspheres with micro-scale through pore structure were prepared by dropping template method and solvent removal method. The effects of material concentration, inner aqueous salt concentration and complex emulsion evolution time on the microsphere morphology and pore structure (PAMA) concentration of 100g / L and PELA concentration of 30 ~ 40g / L, the outer aqueous PVA concentration of 25g / L, the inner aqueous NaCl concentration of 1 ~ 5g / L and the aging time of the emulsion is 0-30min, the surface morphology of the microspheres can be up to several microns and the porosity can reach up to 95% .After the formation of the macroporous microspheres, Its skeleton is covalently cross-linked to form a rigid microsphere framework.