Collaborative Research: Molecular Structure and Phase Separation Behavior of Novel Phosphate-glass / Polymer Hybrids Studied by Advanced Solid-state NMR and Rheometry Methods

合作研究：通过先进的固态核磁共振和流变测量方法研究新型磷酸盐玻璃/聚合物杂化物的分子结构和相分离行为

• 批准号: 0652350
• 负责人: Joshua Otaigbe
• 金额: $ 30万
• 依托单位: University of Southern Mississippi
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0652350&HistoricalAwards=false
• 关键词: Collaborative; Research; Molecular; Structure; Phase

NON-TECHNICAL DESCRIPTION: The results of this work will play an important role in the nation?s interest in developing advanced materials for new and existing applications. The materials are expected to possess a number of desirable properties that will make them useful applications such as solid electrolytes for solid-state batteries or polymer electrolyte membranes for fuel cells and as storage materials for nuclear wastes. The facile synthesis and desirable properties of the hybrid materials will make them excellent model systems for exploring feasibility of new routes for driving inorganic glasses and organic polymers to self-assemble into useful materials, making them widely applicable. The project will provide research training to graduate students and will also take advantage of complementary expertise and research resources at Iowa State University, ETH Zurich, and Sandia National Laboratories (SNL). The project will also advance the graduate students careers by learning how fundamental interdisciplinary knowledge can be used to solve a practical problem. The strong working relations the investigators have developed via an existing NSF-supported U.S.-Switzerland research cooperation, and with SNL will provide critical guidance and clear focus on relevance of the project. The University of Southern Mississippi has a sizable minority student population who could benefit from training in the broad area of materials science and engineering.TECHNICAL DETAILS: The ultimate goal of this collaborative interdisciplinary research project is to better understand the fundamental science governing the phase separation dynamics, thermorheology, and structure formation in low-Tg inorganic phosphate-glass (Pglass)/polymer hybrid system and to identify accurate, predictive models of relationships between fundamental molecular structures and rheological properties of the hybrids. This is a first step toward establishing rational synthesis and design principles to guide the synthesis and processing of new hybrid materials. By using a variety of experimental methods such as advanced solid-state NMR and thermorheological techniques, the investigators propose to understand the Pglass phase separation behavior and its effect on microstructure of the novel low-Tg inorganic Pglass/polymer hybrid materials, and to identify the technological potential of this new class of hybrid materials. The results obtained from these studies will used to test whether or not existing theories on phase separation and self-assembly reported in the literature on simple polymer systems are applicable, and may reduce or eliminate costly "trial and error" practices common in the literature and industry. In addition, advanced solid-state NMR methods for reliably measuring and characterizing the hybrid structure and interactions on the molecular and the nanometer scale will be used and improved. To avoid disappointingly slow progress in prior attempts, mostly in industry, to follow one approach while neglecting the others, this proposal combines the three approaches to rational design and synthesis of materials (i.e., at the molecular level, by materials processing, and by surface chemistry). The diversification of approach and cooperation discussed in this proposal should become more critical as ceramic materials research continues to overlap other materials such as polymers and electro-optical materials. The interface and the fortuitous miscibility in the liquid state between the hybrid components for the rheology and phase separation, the extent of mixing, particularly at the interface between the phase domains and sizes, the favorable reactions between the hybrid components, and the remarkable hybrid viscosity decrease by the Pglass addition will be critical in determining a number of the desirable hybrid properties.

非技术描述：这项工作的结果将在国家为新应用和现有应用开发高级材料的兴趣中发挥重要作用。预计材料将具有许多理想的特性，这些特性将使它们成为有用的应用，例如用于固态电池的固体电解质或用于燃料电池的聚合物电解质膜以及作为核废料的储存材料。混合材料的便捷合成和理想的特性将使它们成为探索新路线的绝佳模型系统，以驱动无机玻璃和有机聚合物自组装成有用的材料，从而使其广泛适用。该项目将为研究生提供研究培训，还将利用爱荷华州立大学，苏黎世和桑迪亚国家实验室（SNL）的补充专业知识和研究资源。该项目还将通过学习如何使用基本的跨学科知识来解决实际问题，从而推动研究生的职业。调查人员通过现有的NSF支持的美国 - 西区研究合作发展的牢固的工作关系，并在SNL的情况下将提供关键的指导，并明确关注该项目的相关性。 The University of Southern Mississippi has a sizable minority student population who could benefit from training in the broad area of​​ materials science and engineering.TECHNICAL DETAILS: The ultimate goal of this collaborative interdisciplinary research project is to better understand the fundamental science governing the phase separation dynamics, thermorheology, and structure formation in low-Tg inorganic phosphate-glass (Pglass)/polymer hybrid system and to identify accurate, predictive杂种的基本分子结构与流变特性之间的关系模型。这是建立合理综合和设计原理以指导新混合材料的综合和处理的第一步。通过使用多种实验方法，例如先进的固态NMR和热风湿技术，研究人员建议了解Pglass相分离行为及其对新型低-TG无机PGLass/Polymer Hybrid材料的微观结构的影响，并确定这种新型杂种材料的技术潜力。从这些研究中获得的结果将用于测试有关相分离的现有理论和文献中有关简单聚合物系统中报告的自我组装的理论，并且可能会减少或消除昂贵的“试验和错误”实践，在文献和行业中常见。此外，将使用和改进高级固态NMR方法，用于可靠地测量和表征分子和纳米尺度上的杂交结构和相互作用。为了避免在先前的尝试中（主要是在行业中）遵循一种方法，同时忽略另一种方法，该提议结合了材料的理性设计和合成的三种方法（即，通过材料处理，表面化学和表面化学）结合了三种方法。随着陶瓷材料研究继续重叠其他材料，例如聚合物和电光材料，该提案中讨论的方法与合作的多元化应该变得更加关键。液态和相位分离的杂化成分之间的界面和偶然的混杂性，混合的程度，尤其是在相域和尺寸之间的界面，混合组件之间的有利反应，以及在PGLass中添加的杰出杂交粘度在pglass中的降低至关重要。