两嵌段共聚物软受限自组装行为研究  

Investigation of self-assemble morphological phases of AB diblock copolymer particles in soft confinement

作　　者：张蓓[1] ZHANG Bei(School of Physical Science and Technology,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学物理科学与技术学院,乌鲁木齐830046

出　　处：《原子与分子物理学报》2021年第2期131-138,共8页Journal of Atomic and Molecular Physics

基　　金：新疆新疆维吾尔自治区自然科学基金(2016D01C065)。

摘　　要：采用模拟退火算法,系统研究了软受限条件下两嵌段共聚物自组装形貌极其转化机理.共聚物形貌可受到受限程度,组分体积分数,以及溶剂选择性3方面因素的调制.在弱受限条件下,共聚物形貌均为球状呈各向同性.核-壳-笼形貌可以极大的增加组分A和组分B之间的接触粒子数,达到增熵降能的效果,在我们的研究工作中是一种罕见的构型.形成多核结构的条件是:AB复合链末端距与其链长比值小于0.23.此次工作对于纳米颗粒的实验制作以及药品输运方面具有极大的理论指导意义.The morphologies of diblock copolymers self-assembled under selected solvent have been investigated systematically using a simulated annealing method.Various categories of internal morphologies are observed.The morphology transform can be modulated by three important factors: softness of confinement,volume fraction of A/B monomers(fAand fB) and selectivity of solvent.The shape of aggregates can be spherical and isotropic under softer confinement.Core-shell-cage could greatly increase the contact area between A monomers and B monomers,which is novel and useful in increasing entropy to reduce energy.The polynuclear condition is that the ratio of end-to-end distance of AB complex chain to the length of whole chain is less than 0.23.this simulation results can provide theoretical guidance for experiment in synthesis of nanoparticles and drug transportion.

关 键 词：两嵌段共聚物 自组装 软受限 

分 类 号：O631[理学—高分子化学]