Spatio-Dynamical Order in Reversible Polymeric Gels

可逆聚合物凝胶中的空间动力学顺序

• 批准号: 0517201
• 负责人: Arlette Baljon
• 金额: $ 24万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-15 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0517201&HistoricalAwards=false
• 关键词: Spatio; Dynamical; Order; Reversible; Polymeric

NON-TECHNICAL EXPLANATION:This award supports computational research and education focused on the study of reversible polymeric gels. The PI's research is aimed at elucidating the fundamental connections between the physics of these remarkable materials and glassy materials. Reversible polymeric gels contain networks of long chain molecules. The structure of these networks is very sensitive to applied forces. The properties of reversible gels are similar to those of other soft glassy matter, for example colloidal pastes, dense lamellar phases, thin glassy films, and emulsions. The behavior of soft glassy matter includes many still poorly understood phenomena and understanding fundamental connections to other materials may provide new insights. Experiments observe transformations between phases that result from the way these materials organize themselves on small length scales in response to static and time dependent applied forces. The PI will use computer simulations to study the nature of the transformations that occur in reversible gels in the context of previous work on thin glassy films. The PI will study the structure of the networks that result and how they change in response to applied forces. Reversible polymeric gels and soft glassy materials are not only of fundamental interest, but also have important applications. Physically associating polymers are used in paints, cosmetics, pharmaceuticals, and coatings. The problems studied here also have connections to problems involving networks in biological systems. The PI also plans to more broadly disseminate knowledge about these materials through the creation of short "movies" for use in presentations to the broader community and in lecture courses.

非技术解释：该奖项支持专注于可逆聚合物凝胶研究的计算研究和教育。PI的研究旨在阐明这些非凡材料和玻璃材料的物理学之间的基本联系。可逆聚合物凝胶包含长链分子的网络。这些网络的结构对施加的力非常敏感。可逆凝胶的性质类似于其他柔软的玻璃状物质，例如胶体糊、致密层状相、薄玻璃状膜和乳液。软玻璃态物质的行为包括许多仍然知之甚少的现象，了解与其他材料的基本联系可能会提供新的见解。实验观察到的相位之间的转换，从这些材料的方式组织自己在小的长度尺度上响应静态和时间依赖性的作用力。PI将使用计算机模拟来研究可逆凝胶中发生的转变的性质，这些转变发生在先前对薄玻璃膜的工作的背景下。PI将研究由此产生的网络结构以及它们如何响应施加的力而变化。可逆聚合物凝胶和软质玻璃态材料不仅具有重要的研究意义，而且具有重要的应用前景。物理缔合聚合物用于油漆、化妆品、药物和涂料中。这里研究的问题也与生物系统中涉及网络的问题有关。公共信息机构还计划通过制作“电影”短片，向更广泛的社区介绍情况，并在讲座中使用，从而更广泛地传播有关这些材料的知识。