Elucidation of Anomalous Domain Growth in Brush Particle Blends

刷子颗粒混合物中异常域生长的阐明

• 批准号: 2209587
• 负责人: Michael Bockstaller
• 金额: $ 43.61万
• 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: 2022
• 资助国家: 美国
• 起止时间: 2022-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2209587&HistoricalAwards=false
• 关键词: Elucidation; Anomalous; Domain; Growth; Brush

NON-TECHNICAL ABSTRACTPolymer nanocomposites are materials that are comprised of inorganic nanomaterials dispersed within a polymer matrix. Polymer nanocomposites display unique physical properties that have rendered them a platform for innovative material technologies in areas such as energy storage and generation, transportation or biomedical. The realization of these technologies is contingent on the ability to control the material’s structure and, thus, its properties. This is hindered by the current lack of understanding of the interactions between the polymer and nanomaterial constituents and their effect on material behavior. The goal of this project is to develop novel methods to control the interactions between polymer and nanomaterial constituents and to harness these interactions to enable polymer nanocomposite materials in which structure and properties can be deliberately controlled to optimize performance. This will promote the development of scalable and economic fabrication processes for materials with improved properties. The program will support the teaching of two new courses on polymer science and engineering and provide training for one graduate student and several undergraduate student researchers. Collaborations with educators at minority serving institutions will be leveraged to support the participation of minority students.TECHNICAL ABSTRACTThe modification of particle surfaces with polymer chains facilitates control of the interactions and assembly behavior of nanoparticle-based materials. The resulting brush particles have thus emerged as model systems to elucidate the physics of materials that are intermediate between the classical ‘colloidal hard sphere’ and ‘polymer coil’ limit and as a platform for the development of functional materials in areas such as self-healing, shape memory, high-k dielectrics, or thermoplastic elastomers. This research project will develop fundamental understanding of the conditions that enable polymer ligands to induce polymer-like phase behavior in (nano)particulate materials. The research will test the hypothesis that the constraining effect of the slow particle diffusion gives rise to the splitting of domain growth kinetics into two regimes: an early ‘anomalous’ regime dominated by the dynamics of grafted chains and a subsequent ‘regular’ growth regime that is governed by particle diffusion. The research plan is organized into three research thrusts that focus on the synthesis of brush particle model systems with systematically varied particle size, degree of polymerization, and density of grafted chains; the characterization of structure evolution of LCST brush particle blend systems in the thin film state as a function of molecular architecture, composition, quench depth and annealing time; and the elucidation of structure evolution of brush particle blend systems in the bulk state using X-ray and neutron scattering analysis. The program provides cross-disciplinary training for one graduate and several undergraduate students in the critical areas of polymer and nanoscale materials as well as self-assembly processes. Collaboration with researchers at minority serving institutions will promote the participation of minority students and underrepresented groups. The program will support the teaching of two new courses on polymer science and engineering as well as a summer course that is offered to high school students visiting Carnegie Mellon University as part of its AP/EA program..This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术抽象聚合物纳米复合材料是在聚合物基质中分散无机纳米材料的材料。聚合物纳米复合材料显示出独特的物理特性，使它们成为在储能和生成，运输或生物医学等领域创新材料技术的平台。这些技术的实现取决于控制材料结构的能力，因此取决于其特性。目前缺乏对聚合物与纳米材料构建体之间相互作用及其对物质行为的影响的阻碍。该项目的目的是开发新的方法来控制聚合物和纳米材料构建体之间的相互作用，并利用这些相互作用以实现聚合物纳米复合材料，其中可以故意控制结构和属性以优化性能。这将促进具有改进性能的材料的可扩展和经济制造过程的开发。该计划将支持两种有关聚合物科学和工程学的新课程的教学，并为一名研究生和几位本科生研究人员提供培训。与少数民族服务机构的教育者的合作将被利用以支持少数群体学生的参与。技术摘要用聚合物链的粒子表面修饰促进了对基于纳米粒子材料的相互作用和组装行为的控制。因此，所产生的刷子颗粒已成为模型系统，以阐明经典的“胶体硬球”和“聚合物线圈”限制的材料物理，以及在自我修复，形状记忆，高功能饮食或热透射式弹性弹性体等领域开发功能材料的平台。该研究项目将对能够使聚合物配体能够诱导（Nano）颗粒物诱导聚合物样相行为的条件发展基本理解。该研究将检验以下假设：慢粒子扩散的约束效应会导致域生长动力学分解为两种状态：早期的“异常”状态由移植链的动态和随后的“常规”生长方向占主导地位。该研究计划分为三个研究推力，侧重于具有系统变化的粒径，聚合程度和移植链密度的刷子颗粒模型系统的合成； LCST刷子混合系统在薄膜状态下的结构演变的表征是分子结构，组成，淬火深度和退火时间的函数；并使用X射线和中子散射分析阐明了刷子粒子混合系统在整体状态下的结构演变。该计划为一名研究生和几个本科生提供了跨学科培训，以及在聚合物和纳米级材料的关键领域以及自组装过程中的跨学科培训。与少数民族服务机构的研究人员合作将促进少数族裔学生和代表性不足的团体的参与。该计划将支持有关聚合物科学和工程学的两门新课程的教学，以及夏季课程，该课程将为访问卡内基·梅隆大学（Carnegie Mellon University）的高中学生提供，作为其AP/EA计划的一部分。该奖项反映了NSF的法定任务，并通过使用该基金会的知识分子功能和广泛的影响来评估Criteria criteria criteria criteria。

项目成果

Miniemulsion SI-ATRP by Interfacial and Ion-Pair Catalysis for the Synthesis of Nanoparticle Brushes

界面和离子对催化细乳液 SI-ATRP 合成纳米颗粒刷

• DOI: 10.1021/acs.macromol.2c01114
• 发表时间: 2022
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Yin, Rongguan;Chmielarz, Paweł;Zaborniak, Izabela;Zhao, Yuqi;Szczepaniak, Grzegorz;Wang, Zongyu;Liu, Tong;Wang, Yi;Sun, Mingkang;Wu, Hanshu
• 通讯作者: Wu, Hanshu

Topologically Induced Heterogeneity in Gradient Copolymer Brush Particle Materials

• DOI: 10.1021/acs.macromol.2c01131
• 发表时间: 2022-07
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Yuqi Zhao;Zongyu Wang;Chenxi Yu;Hanshu Wu;Mateusz Olszewski;Rongguan Yin;Yue-Liang Zhai;Tong Liu;Amy Coronado;K. Matyjaszewski;M. Bockstaller

Alternating Methyl Methacrylate/ n -Butyl Acrylate Copolymer Prepared by Atom Transfer Radical Polymerization

原子转移自由基聚合制备甲基丙烯酸甲酯/丙烯酸正丁酯交替共聚物

• DOI: 10.1021/acsmacrolett.2c00517
• 发表时间: 2022
• 期刊: ACS Macro Letters
• 影响因子: 7.015
• 作者: Yin, Rongguan;Zhao, Yuqi;Gorczyński, Adam;Szczepaniak, Grzegorz;Sun, Mingkang;Fu, Liye;Kim, Khidong;Wu, Hanshu;Bockstaller, Michael R.;Matyjaszewski, Krzysztof
• 通讯作者: Matyjaszewski, Krzysztof

Seawater-Degradable and Antibacterial Epoxy Thermosets Employing Betaine Ester Linkages

• DOI: 10.1021/acsapm.2c02239
• 发表时间: 2023-04
• 期刊: ACS Applied Polymer Materials
• 影响因子: 5
• 作者: Jin Han;Quan Chen;Yiping Feng;Yupeng Shen;Dan Wu;Mingqiang Zhong;Qiaoye Zhang;Zhengping Zhao-Zhengping