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嵌段共聚物与接枝纳米粒子在硬受限下的自组装

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采用自洽场方法(SCFT),研究了两嵌段共聚物与接枝均聚物纳米粒子在硬受限下的自组装行为,详细探讨了板的性质与受限程度对体系相行为的影响,结果发现随着受限程度和板性质的变化,体系发生了多次结构转变.当AB两嵌段共聚物对称(fa=fb=0.5)时,在体系受限较小(70≤N2≤120)情况下,无论板的性质如何变化,体系均会形成波浪层状和平行层状混合结构.当受限程度增大(40≤N2≤60)时,在中性板中,体系会自组装形成同心圆环结构;在A吸引板中,体系会形成柱状结构和平行层状混合结构;在B吸引板中,体系会自组装形成带状、层状以及同心圆环混合结构.当受限程度较大(20≤N2≤30)时,在中性板和A吸引板中,体系最终转变为垂直层状结构;在B吸引板中,体系自组装形成平行层状结构.最后,还探讨了熵效应对体系结构形成的影响.
Self-assembly of Block Copolymers with Grafted Nanoparticles under Hard Confinement
Self-consistent field method(SCFT)is used to study the self-assembly behavior of two block co-polymers and grafted homopolymer nanoparticles under hard restriction,and discusses the influence of the nature and restriction degree of plate on the phase behavior of the system in detail.It is found that with the restriction degree and plate property change.When the AB two-block copolymers are symmetric(fa=fb=0.5),In the case of small system limitation(70≤N2 ≤120),the system changes,no matter how the properties of the plate change.When the restriction increases(40≤N2 ≤60),the system will gradually self-assemble to form concentric ring structure in the neutral plate,the system will gradually form column structure and parallel layered structure;in the attractive A group plate,the system will self-assemble to form ribbon,layered and concentric ring struc-ture.When restricted(20 ≤N2 ≤30),the system eventually transforms into A vertical layered structure in the neutral plate and the attractive group A component plate,and the system is self-assembled into A parallel layered structure.Finally,explore the effects of the entropy effect on the architecture formation.

Block copolymersNanoparticlesHard-constrainedSelf-consistent field method

蔚慧敏、王阳、王康颖、张海涛、潘俊星、张进军

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山西师范大学物理与信息工程学院,山西太原 030031

嵌段共聚物 纳米粒子 硬受限 自洽场方法

山西师范大学科技创新项目山西省研究生教育创新项目

2022XSY0162021Y489

2024

山西师范大学学报(自然科学版)
山西师范大学

山西师范大学学报(自然科学版)

影响因子:0.512
ISSN:1009-4490
年,卷(期):2024.38(1)
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