%0 Journal Article
%T Preparation of Gigaporous P(MMA-MAA) Microspheres by Two-step Emulsification,Emulsion Ripening and Solvent Extraction<br>复乳液滴模板法结合溶剂去除法制备P(MMAMAA)超大孔聚合物微球
%A CHEN Song-fei
%A WANG Qi-bao
%A SU Zhi-guo
%A MA Guang-hui
%A GAO Fei
%A <br>陈松飞
%A 王启宝
%A 苏志国
%A 马光辉
%A 高飞
%J 过程工程学报
%D 2012
%I 
%X P(MMA-MAA) was used as the major component of particle material and amphiphilic polymer PELA as a complementary material.Gigaporous poly(methyl methacrylate-methacrylic acid) P(MMA-MAA)] microspheres with flow-through pores with the diameters from submicron to micron scale were prepared by two-step emulsification,emulsion ripening and solvent extraction.The influential parameters on final morphology were particularly investigated,including the polymer component,ripening time and osmotic gradient.Under the optimum preparation conditions of P(MMA-MAA) concentration 100 g/L,PELA amount 40 g/L,PVA concentration in W2 25 g/L,NaCl concentration in W1 1%~5 g/L and emulsion ripening time 0~30 min,the microspheres with pore size at micron scale and porosity of 95% were obtained.The formation mechanism of gigapores was discussed with consideration of the evolution behavior of double-emulsion system.The rigidity of microspheres could be improved by cross-linking after the formation of porous particles.
%K gigaporous microspheres
%K amphiphilic polymer
%K double-emulsion<br>超大孔微球
%K 两亲性聚合物
%K 复乳液
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=ACE46FDFF1576C244C2E39BD72A97A04&yid=99E9153A83D4CB11&vid=59906B3B2830C2C5&iid=38B194292C032A66&sid=DDEED1BDDBFAA8A7&eid=AC2617B68B137D9D&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=0