纳米粒子驱动的聚合物共混体系在受限条件下的相行为研究
发布时间：2018-08-24 17:10
【摘要】：聚合物混合体系能够自组装形成许多新奇的结构,然而这些聚合物在均质基板或本体中往往形成高度无序的结构。理论和实验证明,可以通过受限和掺杂有效地控制聚合物混合体系的自组装行为。本文选用基于含时金兹堡-朗道理论(Time-Dependent Ginzburg-Landau Theory,简称TDGL)的元跑动力学方法(Cell dynamical system method,简称CDS),探讨了在纳米粒子(NPs)的作用下,两嵌段共聚物AB与均聚物C在不同受限环境下的自组装行为。首先,我们探讨了在纳米粒子的作用下,两嵌段共聚物AB与均聚物C在平板受限下的自组装行为。详细讨论了在不同的板间距(小,中,大)下,纳米粒子的浓度与浸润性质对体系自组装行为的影响。研究结果表明,在不同板间距下,纳米粒子驱动体系实现了从柱状到层状的相互转变。同时,我们讨论了其形成机理。这一结论为理论和实验上控制高分子聚合物有序自组装提供了有益的参考和借鉴。其次,我们探讨了在纳米粒子的作用下,两嵌段共聚物AB与均聚物C在球形受限下的自组装行为。详细讨论了在不同的球形受限条件下,纳米粒子的浓度与浸润性质对体系自组装行为的影响。研究结果表明,在不同受限条件下,纳米粒子驱动体系实现了多种取向序的转变,实现了从双螺旋结构到层状结构,单螺旋结构到双螺旋结构,层状结构到单螺旋结构的转变。上述研究结果为构造特殊性能的复合新功能材料提供了有益的理论指导。通过以上研究,我们发现:纳米粒子驱动的高分子聚合物复杂体系在受限环境下,会使得体系形成一系列有序的自组装形貌,该研究结果为理论和实验方面及工业上制取有序形貌与结构的高分子聚合物材料提供了有益的指导。
[Abstract]:Polymer mixtures can self-assemble to form many novel structures, but these polymers tend to form highly disordered structures in homogeneous substrates or bulk. It is proved theoretically and experimentally that the self-assembly behavior of polymer mixing system can be effectively controlled by limiting and doping. In this paper, based on the time-dependent Kinzbauer-Landau theory (TDGL), the method of meta-running-dynamics, (Cell dynamical system method, for CDS), is used to discuss the effect of nano-particle (NPs). Self-assembly behavior of diblock copolymer AB and homopolymer C in different confined environments. Firstly, we investigated the self-assembly behavior of diblock copolymer AB and homopolymer C under flat plate confinement under the action of nanoparticles. The effects of the concentration and wetting properties of nanoparticles on the self-assembly behavior of the system were discussed in detail at different plate spacing (small, medium and large). The results show that the nanocrystalline particle driven system can transform from columnar to layered at different plate spacing. At the same time, we discussed its formation mechanism. This conclusion provides a useful reference for controlling the ordered self-assembly of polymer in theory and experiment. Secondly, we investigated the self-assembly behavior of diblock copolymer AB and homopolymer C under spherical confinement under the action of nanoparticles. The effects of the concentration and wettability of nanoparticles on the self-assembly behavior of the system under different spherical confinement conditions were discussed in detail. The results show that the nanocrystalline particle driven system can change from double helix structure to layered structure, single helix structure to double helix structure and layered structure to single helix structure under different confined conditions. These results provide useful theoretical guidance for the construction of new composite functional materials with special properties. Through the above research, we found that the complex polymer system driven by nano-particles can form a series of ordered self-assembly morphology in confined environment. The results provide useful guidance for the preparation of polymer materials with ordered morphology and structure in theory, experiment and industry.
【学位授予单位】：山西师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O631
本文编号：2201473
[Abstract]:Polymer mixtures can self-assemble to form many novel structures, but these polymers tend to form highly disordered structures in homogeneous substrates or bulk. It is proved theoretically and experimentally that the self-assembly behavior of polymer mixing system can be effectively controlled by limiting and doping. In this paper, based on the time-dependent Kinzbauer-Landau theory (TDGL), the method of meta-running-dynamics, (Cell dynamical system method, for CDS), is used to discuss the effect of nano-particle (NPs). Self-assembly behavior of diblock copolymer AB and homopolymer C in different confined environments. Firstly, we investigated the self-assembly behavior of diblock copolymer AB and homopolymer C under flat plate confinement under the action of nanoparticles. The effects of the concentration and wetting properties of nanoparticles on the self-assembly behavior of the system were discussed in detail at different plate spacing (small, medium and large). The results show that the nanocrystalline particle driven system can transform from columnar to layered at different plate spacing. At the same time, we discussed its formation mechanism. This conclusion provides a useful reference for controlling the ordered self-assembly of polymer in theory and experiment. Secondly, we investigated the self-assembly behavior of diblock copolymer AB and homopolymer C under spherical confinement under the action of nanoparticles. The effects of the concentration and wettability of nanoparticles on the self-assembly behavior of the system under different spherical confinement conditions were discussed in detail. The results show that the nanocrystalline particle driven system can change from double helix structure to layered structure, single helix structure to double helix structure and layered structure to single helix structure under different confined conditions. These results provide useful theoretical guidance for the construction of new composite functional materials with special properties. Through the above research, we found that the complex polymer system driven by nano-particles can form a series of ordered self-assembly morphology in confined environment. The results provide useful guidance for the preparation of polymer materials with ordered morphology and structure in theory, experiment and industry.
【学位授予单位】：山西师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O631
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