双亲3嵌段共聚物刷在选择性溶液中自组装形态的Monte Carlo模拟  

Monte Carlo Study of the Self-assembly of Amphiphilic Triblock Copolymer Brushes in Selective Solvents

作　　者：徐纪华[1] 尹玉华[1] 王铮[1] 蒋润[1] 李宝会[1] 

机构地区：[1]南开大学物理科学学院,天津300071

出　　处：《南开大学学报（自然科学版）》2013年第3期84-88,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(20904026;20904027;20990234;20925414)

摘　　要：利用MonteCarlo方法研究了对称ABA型双亲3嵌段共聚物刷在选择性溶液中的自组装形态.针对溶剂对A嵌段为良溶剂,对B嵌段为不良溶剂的体系,研究了亲水A嵌段长度和疏水B嵌段的长度对溶液中3嵌段共聚物刷聚集体形态的影响.模拟结果表明,随着疏水B嵌段长度的增加,共聚物自组装形态依次为球状、条状、连通条状、孔层状、层状;而随着亲水A嵌段长度的增加,共聚物的自组装形态会发生从条状相到蠕虫相的转变.The Monte Carlo method is used to study the self-assembling process of the tri- block copolymer brushes in selective solvents, which is good for the A-block but poor for the middle B-block. The influence of the block lengths, for both the soluble A-block and the insol- uble B-blocks, on the morphology of triblock copolymer brushes in solution is studied. It is shown that the morphological transitions of the aggregates, from spheres to stripes, to perfo- rated layer, and then to layer with increasing the length of the B-block, and from stripes to wormlike micelles with increasing the length of the A-block, are observed.

关 键 词：双亲3嵌段共聚物刷 自组装 MONTE Carlo 

分 类 号：O552.6[理学—热学与物质分子运动论]