均聚物的添加对棒/线两亲性嵌段共聚物溶液自组装的影响  

The effect of the addition of homopolymer on self-assembly behavior in rod/coil amphiphilic block copolymer solutions

作　　者：朱孟瑶 韩向刚[1] ZHU Meng-yao;HAN Xiang-gang(College of Science,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China)

机构地区：[1]内蒙古科技大学理学院,内蒙古包头014010

出　　处：《西北师范大学学报（自然科学版）》2024年第3期34-41,共8页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(22163005)。

摘　　要：为了明晰均聚物对棒/线嵌段共聚物聚集行为的影响,利用实空间求解的格子自洽场方法,研究柔性均聚物和线/棒/线两亲性对称三嵌段共聚物溶液混合体系的自组装行为.格子自洽场方法通过链传播子和格子的各向异性近似处理分子链刚性,这使得该方法在计算速度方面有显著优势.模拟结果表明,均聚物对胶束结构重排行为的影响依赖于疏水棒嵌段长度,这源于棒嵌段长度的改变一定程度上影响了胶束破碎/融合的实现.研究还发现,均聚物的添加稳定了胶束重排过程中胶束结构的变化.本文的结果有助于进一步理解以刚性嵌段为核心胶束的生长机制,为相关的实验设计和材料应用提供理论指导.In order tOclarify the effect of homopolymers on the aggregation behavior of rod/coil block copolymers,the self-assembly of the mixture of flexible homopolymers and coil/rod/coil amphiphilic symmetric triblock copolymer solutions was studied by using the lattice self-consistent field method solved in real space.The lattice self-consistent field method approximates the rigidity of the molecular chain by using the chain propagator and the anisotropy of the lattice,which makes the method significantly faster in terms of calculation speed.The simulation results show that the influence of homopolymers on micellar structure rearrangement depends on the length of the hydrophobic rod blocks,which is due tOthe change of rod block length affects the realization of micelle breaking/fusion mechanism tOa certain extent.It is alsOfound that the addition of homopolymers stabilizes the change of micellar structure during the micelle rearrangement.The results of this paper are helpful tOfurther understand the growth mechanism for the micellar cores consisting of rigid blocks,and provide theoretical guidance for the relevant experimental design and material application.

关 键 词：两亲性三嵌段共聚物 均聚物 自洽场方法 胶束 

分 类 号：O411[理学—理论物理]