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Catalysis of Microstructure Evolution in Block Copolymer Blend Materials Through Dynamic Modulation of Filler/Matrix Interactions

通过动态调节填料/基体相互作用催化嵌段共聚物共混材料的微观结构演化

基本信息

批准号：
1410845
负责人：
Michael Bockstaller
金额：
$ 36万
依托单位：
Carnegie-Mellon University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-07-01 至 2017-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1410845&HistoricalAwards=false
关键词：
Catalysis Microstructure Evolution Block Copolymer

项目摘要

NON-TECHNICAL SUMMARY: Block copolymers are materials that are capable of self-organizing into a hierarchy of functional nanostructures that are of technological relevance in applications ranging from polymer membranes for next-generation lithium ion batteries to high-performance polymer photovoltaics. The goal of this project is to develop processes to control the formation of defects in these nanostructures, a key requirement for the future technological exploitation of block copolymer based materials. The ultimate goal is to establish procedures that will allow the efficient and economically viable fabrication of block copolymer materials with precisely controlled nanostructure and properties. The program will enhance the teaching of two polymer classes and provide training for one graduate and several undergraduate researchers in the critical area of polymer and nanoscale materials. Ongoing collaborations with educators at Florida A&M University as well as Carnegie Mellon will be leveraged to support the participation of minority students and to engage high school students in materials engineering. Finally, a novel educational interface will be developed for 'hands-on' exploration of materials physics concepts as a means to engage and attract middle and high school students to the study of science and engineering.TECHNICAL SUMMARY: The objective of this research program is to understand the implications of filler-matrix interactions on the microstructure evolution in bulk block copolymers and to test the hypothesis that the dynamic modulation of filler-matrix interactions provides a means to increase the rate of grain coarsening. In a first part the project will be focused on the synthesis of a range of homopolymer and polymer-grafted nanoparticle model systems that will facilitate the elucidation of the effect of filler-matrix interactions on the microstructure evolution process in block copolymer blend materials. In a second part, the project will establish the coarsening kinetics and evolution of grain boundary structures in block copolymer/homopolymer blend systems in which the homopolymer favorably interacts with the host copolymer domain. A parallel series of corresponding block copolymer/nanoparticle blend systems will be pursued to identify the role of filler-matrix interaction on the segregation of fillers within boundary regions. In a third part, the program will explore the effect of temperature-cycling to dynamically (and reversibly) 'switch' the interaction between filler and copolymer host domain from 'athermal' to 'miscible'. The objective is to test whether the dynamic modulation of filler-matrix interactions provides a means to energetically destabilize grain boundary defects and hence raise the driving pressure for grain growth. The research plan will be enhanced by collaboration with expert groups in the areas of polymer synthesis and simulation who will provide access to model material systems and support the interpretation of data.

非技术摘要：嵌段共聚物是能够自组织成功能纳米结构层次的材料，其在从下一代锂离子电池的聚合物膜到高性能聚合物光伏发电的应用中具有技术相关性。该项目的目标是开发控制这些纳米结构中缺陷形成的工艺，这是嵌段共聚物基材料未来技术开发的关键要求。最终目标是建立能够高效且经济可行地制造具有精确控制的纳米结构和性能的嵌段共聚物材料的程序。该项目将加强两个聚合物课程的教学，并为聚合物和纳米材料关键领域的一名研究生和几名本科生研究人员提供培训。将利用与佛罗里达农工大学和卡内基梅隆大学教育工作者的持续合作来支持少数族裔学生的参与，并让高中生参与材料工程。最后，将开发一种新颖的教育界面，用于“实践”探索材料物理概念，作为吸引中学生和高中生学习科学和工程的一种手段。技术摘要：本研究计划的目的是了解填料-基体相互作用对本体嵌段共聚物微观结构演变的影响，并检验填料-基体相互作用的动态调节提供了一种提高填料-基体相互作用的方法的假设。晶粒粗化率。在第一部分中，该项目将重点关注一系列均聚物和聚合物接枝纳米粒子模型系统的合成，这将有助于阐明填料-基体相互作用对嵌段共聚物共混材料中微观结构演变过程的影响。在第二部分中，该项目将建立嵌段共聚物/均聚物共混体系中晶界结构的粗化动力学和演化，其中均聚物与主体共聚物域有利地相互作用。将寻求一系列相应的嵌段共聚物/纳米颗粒共混系统，以确定填料-基体相互作用对边界区域内填料分离的作用。在第三部分中，该计划将探讨温度循环对填料和共聚物主体结构域之间的相互作用从“无热”到“可混溶”动态（可逆）“切换”的影响。目的是测试填料-基体相互作用的动态调节是否提供了一种大力破坏晶界缺陷稳定的方法，从而提高晶粒生长的驱动压力。该研究计划将通过与聚合物合成和模拟领域的专家组合作得到加强，专家组将提供模型材料系统的访问权限并支持数据的解释。