报告题目：Directed Self-Assembly of Block Copolymer Solutions: Paving the Way for Rational Design of Multifunctional Materials
报告人：Xianggui Ye (Department of Chemical and Biomolecular Engineering, University of Tennessee)
报告时间：5月2日（星期二）10:00-11:00
报告地点：实验一楼二层大会议室
联系人：王立权
摘要：
Block copolymers are comprised of two or more chemically bonded blocks with dissimilar chemistries that can self- assemble into various well-defined nanostructures such as spheres, cylinders, and lamellae. Due to their diverse nanoscale structures, block copolymers have a wide array of applications including membranes, lithographic template, nanophotonic, hybrid materials, medicinal applications, nanoreactors, and stimuli-responsive materials. One of the most common pathways to create these nanostructures is directed self-assembling in solution.
Therefore, it is crucial to understand whether the block copolymer in a solvent forms micelle or not and if yes, its structure as well as the experimental condition’s effect such as external agitation, on nanostructure formation. In this talk, I will focus on the fundamentals of block copolymer self-assembly in solution with the aim of paving the way for mechanistic understanding of block copolymer based membrane formation by Non-Solvent Induced Phase Separation (NIPS) process. Specifically, the details of: (1) crew-cut micelle formation in a good solvent for all blocks, (2) crew-cut micelle response to non-solvent addition, (3) how to tune micelle size by blending, and (4) how external agitation affects the aforementioned processes will be discussed. In turn, the fundamental understanding derived from this research to design and synthesis of multifunctional materials based on block copolymers will be highlighted.