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.

非技术摘要聚合物纳米复合材料是由分散在聚合物基质中的无机纳米材料组成的材料，聚合物纳米复合材料具有独特的物理特性，使其成为能源存储和发电、运输或生物医学等领域的创新材料技术的平台。这些技术的发展取决于控制材料结构及其性能的能力，而目前对聚合物和纳米材料成分之间的相互作用缺乏了解，这阻碍了这一点。该项目的目标是开发新方法来控制聚合物和纳米材料成分之间的相互作用，并利用这些相互作用来实现聚合物纳米复合材料的结构和性能可以被有意控制以优化性能。该计划将支持两门关于聚合物科学与工程的新课程的教学，并与少数族裔服务机构的教育工作者合作，促进开发可扩展且经济的材料制造工艺。将用于支持参与技术摘要用聚合物链对颗粒表面进行改性有助于控制基于纳米颗粒的材料的相互作用和组装行为，由此产生的刷子颗粒已成为阐明介于经典“纳米颗粒”之间的材料的物理特性的模型系统。 “胶体硬球”和“聚合物线圈”的限制，并作为开发自修复、形状记忆、高 k 电介质或热塑性弹性体等领域功能材料的平台。研究项目将深入了解聚合物配体在（纳米）颗粒材料中诱导类聚合物相行为的条件，该研究将检验缓慢粒子扩散的约束效应导致域生长分裂的假设。该研究计划分为三个研究重点，重点是刷子粒子的合成。具有系统性的模型系统不同的颗粒尺寸、聚合度和接枝链的密度；表征薄膜状态下 LCST 刷颗粒共混体系的结构演化，作为分子结构、组成、淬火深度和退火时间的函数；该项目为一名研究生和几名本科生提供聚合物和纳米材料以及自组装过程关键领域的跨学科培训。与少数族裔机构的研究人员合作将促进少数族裔学生和弱势群体的参与，该计划将支持两门高分子科学与工程新课程的教学，以及为访问卡内基梅隆大学的高中生提供的暑期课程。作为其 AP/EA 计划的一部分。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

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