不良溶剂氛围中用breath figures法制备聚合物微球  

Fabrication of Polymeric Microspheres by Breath Figures in Different Nonsolvent Atmospheres

作　　者：黄春梅[1] 张萌[1] 王冬晖[1] 白卫斌[1] 徐艳莲[1,2] 林金火[1,2] 

机构地区：[1]福建师范大学材料科学与工程学院,福州350007 [2]福建省高分子材料重点实验室(福建师范大学),福州350007

出　　处：《高分子学报》2014年第12期1606-1612,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号51073037)资助项目

摘　　要：通过使用操作简单、不需去除模板也不需使用乳化剂的breath figures(BFs)法,在多种非水氛围中制得聚合物微球,如丙烯腈-丙烯酸甲酯-苯乙烯三元共聚物(ASA)和聚丁二酸丁二醇酯(PBS)等;并研究了聚合物溶液浓度、不同氛围等对微球形貌的影响.结果表明,以甲醇、乙醇和正己烷为氛围时均可制得聚合物微球,而在乙酸中得到的是聚合物多孔膜.在乙醇氛围中随着聚合物浓度的增加,微球逐渐黏结,均一性变差;随着乙醇氛围中水含量的增加,形貌由微球过渡到微孔膜.Polymeric microspheres ware prepared by the breath figures（BFs） method which had the inexpensive and simple process.A variety of polymeric microspheres,such as acrylate-styrene-acrylonitrile copolymer（ASA）,poly（butylene succinate）（PBS）,acrylonitrile butadiene styrene copolymer（ABS） and so on,were successfully prepared by BFs in the different nonsolvent atmospheres.Ethanol,methanol,n-hexane and acetic acid vapors were chosen as the nonsolvent atmosphere.Several influencing factors were considered on the formation of the microspheres with different morphologies,including the concentration of the polymer solution,the surface tension of ASA / CHCl3 solutions and the nonsolvent atmosphere.Then the patterns were characterized by scanning electron microscopy（SEM）.It was found that the nonsolvent atmosphere affected the microspheres morphology,including the microspheres shape,size and the diameter distribution.With the decrease of the concentration of ethanol in water,the morphology of the microspheres became that of micropores.Furthermore,with the increase of the concentration of the polymer solution,a gradual change was observed in the polymeric morphology,from a microsphere pattern to a porous structure composed of adjoined microsphere in the ethanol atmosphere.The results proved that the BFs method is not only suitable for preparing ordered porous polymer films,but is also compatible with preparing polymeric microspheres.Also,this paper develops a facile way to control the morphology features by changing the vapor atmosphere,which is valuable for designing and fabricating ordered polymeric microstructures.

关 键 词：BREATH FIGURES 不良溶剂 聚合物 微球 多孔膜 

分 类 号：O631.5[理学—高分子化学]