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Elucidating Grain Boundary Complexion Transitions and their Role on Grain Growth in Granular Block Copolymer Microstructures

阐明晶界复杂转变及其对颗粒嵌段共聚物微结构中晶粒生长的作用

基本信息

批准号：
1709344
负责人：
Michael Bockstaller
金额：
$ 23万
依托单位：
Carnegie-Mellon University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2020-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1709344&HistoricalAwards=false
关键词：
Elucidating Grain Boundary Complexion Transitions

项目摘要

NON-TECHNICAL SUMMARYBlock copolymers are materials that are capable of self-organizing into functional nanostructures that are of technological relevance in applications ranging from membranes for water purification to next-generation lithium ion batteries to high-performance polymer photovoltaics. The realization of these technologies is hindered by defects in block copolymer nanostructures that form during the self-organization process and that reduce the properties of materials. The goal of this project is to establish a transformative new process to control and reduce the number of defects in block copolymer nanostructures. This will promote the development of scalable and economic fabrication processes for materials with improved properties. The program will support the teaching of a new laboratory course on polymer materials and provide training for one graduate student and several undergraduate student researchers. Ongoing collaborations with educators at minority serving institutions will be leveraged to support the participation of minority students. Finally, the potential of novel educational technologies based on 'haptic human-computer interactions' as a means to engage and attract middle and high school students to the study of science and engineering will be established. TECHNICAL SUMMARYThe fabrication of large-grained microstructures with reduced defect densities presents a prerequisite to the application of block copolymer (BCP) materials across a wide range of innovative material technologies. Understanding of the mechanism of grain growth and the evolution of defect structures during the annealing process is therefore a subject that is of fundamental relevance to both the science and engineering of BCP-based materials. The objective of this project is to elucidate the role of filler-matrix interactions on grain coarsening in miscible BCP/homopolymer blends and to test the hypothesis that grain boundary complexion transitions -- i.e. transitions within the phase of filler that is segregated to grain boundary interfaces -- increase the driving pressure for grain growth and hence the rate of grain coarsening. In a first part, the program will be focused on establishing the miscibility range and (equilibrium) microdomain formation in BCP/homopolymer blends systems in which the homopolymer forms a LCST blend with the host copolymer domain. In a second part, the project will focus on establishing the effect of filler/matrix interactions on the energy of grain boundary interfaces in quiescent organized films. If successful, this project will provide a basis for the development of novel processing strategies towards low defect-density BCP materials that harness the 'catalytic' effect of designed filler additives on grain coarsening to efficiently organize BCPs into desired large-grained microstructures. The program will enhance the teaching of a new class on "Soft Material Microstructure and Properties" and provide training for one graduate and several undergraduate researchers in the critical area of polymer and nanoscale materials. Finally, the benefits of kinesthetic experiments to the teaching of polymer and material science will be evaluated.

非技术概述嵌段共聚物是能够自组织成功能性纳米结构的材料，其在从水净化膜到下一代锂离子电池到高性能聚合物光致发光材料的应用中具有技术相关性。这些技术的实现受到嵌段共聚物纳米结构中缺陷的阻碍，这些缺陷在自组织过程中形成并降低了材料的性能。该项目的目标是建立一种变革性的新工艺，以控制和减少嵌段共聚物纳米结构中的缺陷数量。这将促进具有改进性能的材料的可扩展和经济的制造工艺的发展。该计划将支持高分子材料新实验室课程的教学，并为一名研究生和几名本科生研究人员提供培训。将利用与少数群体服务机构教育工作者的持续合作，支持少数群体学生的参与。最后，将建立基于“触觉人机交互”的新型教育技术的潜力，作为吸引和吸引初中和高中学生学习科学和工程的手段。技术概述制造具有降低的缺陷密度的大晶粒微结构是嵌段共聚物（BCP）材料在各种创新材料技术中应用的先决条件。因此，理解退火过程中晶粒生长和缺陷结构演变的机制是一个与BCP基材料的科学和工程都具有根本相关性的课题。本项目的目的是阐明填料-基质相互作用对可混溶BCP/均聚物共混物中晶粒粗化的作用，并测试晶界复合过渡的假设-即在分离到晶界界面的填料相内的过渡-增加晶粒生长的驱动压力，从而增加晶粒粗化的速率。在第一部分中，该计划将集中在建立的嵌段共聚物/均聚物共混物体系中的相容性范围和（平衡）微区的形成，其中均聚物形成LCST共混物与主共聚物域。在第二部分中，该项目将集中在建立静态有组织的薄膜中的晶界界面的能量上的填料/基质相互作用的效果。如果成功的话，该项目将为开发低缺陷密度BCP材料的新加工策略提供基础，该材料利用设计的填料添加剂对晶粒粗化的“催化”作用，有效地将BCP组织成所需的大晶粒微观结构。该计划将加强“软材料微观结构和性能”新课程的教学，并为一名研究生和几名本科生研究人员提供聚合物和纳米材料关键领域的培训。最后，对动觉实验在高分子与材料科学教学中的作用进行了评价。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Kinetics and Energetics of Solute Segregation in Granular Block Copolymer Microstructures

DOI：
10.1021/acs.macromol.8b02044
发表时间：
2018-12-25
期刊：
MACROMOLECULES
影响因子：
5.5
作者：
Lee, Bongjoon;Bleuel, Markus;Bockstaller, Michael R.
通讯作者：
Bockstaller, Michael R.

Solution processable liquid metal nanodroplets by surface-initiated atom transfer radical polymerization

DOI：
10.1038/s41565-019-0454-6
发表时间：
2019-05
期刊：
Nature Nanotechnology
影响因子：
38.3
作者：
Jiajun Yan;M. Malakooti;Zhao Lu;Zongyu Wang;Navid Kazem;C. Pan;M. Bockstaller;C. Majidi;K. Matyj
通讯作者：
Jiajun Yan;M. Malakooti;Zhao Lu;Zongyu Wang;Navid Kazem;C. Pan;M. Bockstaller;C. Majidi;K. Matyj

Tunable Assembly of Block Copolymer Tethered Particle Brushes by Surface-Initiated Atom Transfer Radical Polymerization

通过表面引发原子转移自由基聚合嵌段共聚物系留粒子刷的可调组装

DOI：
10.1021/acsmacrolett.0c00158
发表时间：
2020
期刊：
ACS Macro Letters
影响因子：
7.015
作者：
Wang, Zongyu;Lee, Jaejun;Wang, Zhenhua;Zhao, Yuqi;Yan, Jiajun;Lin, Yu;Li, Sipei;Liu, Tong;Olszewski, Mateusz;Pietrasik, Joanna
通讯作者：
Pietrasik, Joanna

Work in Progress: Kinesthetic Learning of Network Mechanics using Force Feedback Technology

正在进行的工作：使用力反馈技术进行网络力学的动觉学习