NIRT: Multiphase Functional Nanomaterials

NIRT：多相功能纳米材料

• 批准号: 0404278
• 负责人: Tamara Floyd Smith
• 金额: $ 130万
• 依托单位: Tuskegee University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0404278&HistoricalAwards=false
• 关键词: NIRT; Multiphase; Functional; Nanomaterials

This nanoscale interdisciplinary research team (NIRT) award involves collaboration between participants at Tuskegee University, University of Alabama at Birmingham(UAB) and Cornell University, and is co-funded by the NSF Divisions of Materials Research, Chemistry, Civil and Mechanical Systems, Manufacturing and Industrial Innovation, and Electrical and Communication Systems. Many new engineering materials are composites with anisotropic structure on nanometer and sub-nanometer length scales. While much academic research has been devoted to synthesis and characterization of homogeneous two-component nanocomposite materials, very little attention has been given to understanding and exploiting important synergistic effects that arise when nanostructures are added to multiphase polymer materials. Controlled integration of nanostructures that can compatibilize, align, or alter the crystalline morphology of multi-component polymer mixtures dramatically increases the physical sophistication of conventional nanocomposite materials and provides new strategies for materials design on the nanoscale. The objective of the proposed research is three-fold. First, to develop a new class of functional nanocomposite materials based on dispersed anisotropic nanostructures in single-component and multi-component polymer mixtures. Second, to improve fundamental understanding of how surface functionalized nanostructures affect phase behavior, crystalline morphology, rheology, curing kinetics, and properties of multiphase polymeric materials. Finally, to quantify the effect of processing shear fields and polymer particle interactions on alignment and spatial distribution of anisotropic nanostructures in synthetic polymers. Our work will focus on surface-functionalized carbon nanotubes (CNT) and silica nanorods dispersed in model polymer systems. Each system will be chosen to introduce progressively greater degrees of complexity to the basic nanocomposite motif, providing new insight into methods for controlling polymer structure at the nanoscale using anisotropic nanostructures. Intellectual Merit: The proposed research is important for scientific as well as practical reasons. Our work, for example, exploits the known high surface/volume ratio of nanostructures to simultaneously compatibilize and reinforce polymer mixtures. We also study, for the first time, how processing shear fields influence the spatial distribution of dispersed nanoparticles in polymer hosts and how these effects can be exploited to create macroscopic objects with novel core/shell transport properties. The proposed study is also among the first to utilize solid-state deformation to align nanostructures and polymer molecules in a nanocomposite material. If successful, this work will improvefundamental understanding of nanocomposite materials and will help advance the state ofthe art for creating polymers with graded property profiles.Broader Impact: Students at Tuskegee, UAB and Cornell that participate in the proposed research will receive unique, broad-based education in materials chemistry, materials physics, flow behavior of multiphase polymer liquids, and solid state properties of nanostructured materials. Students from our institutions will spend time working with a NIRT team member from another institution. This will foster deeper collaborative research relationships among participating faculty and will enhance the quality of the learning experience provided to our students, both graduate and undergraduate. Students at each university will also be exposed to courses in nanostructured materials science and processing. Outreach efforts will include activities involving exposure of K-12 students to nanoscale science and technology.

这个纳米级跨学科研究团队（NIRT）奖涉及塔斯基吉大学，亚拉巴马大学伯明翰分校（UAB）和康奈尔大学的参与者之间的合作，并由NSF材料研究，化学，土木和机械系统，制造和工业创新以及电气和通信系统部门共同资助。 许多新型工程材料都是纳米和亚纳米尺度上具有各向异性结构的复合材料。虽然许多学术研究一直致力于合成和表征的均匀的双组分纳米复合材料，很少有人注意到理解和利用重要的协同效应时，纳米结构被添加到多相聚合物材料。纳米结构的可控整合可以使多组分聚合物混合物的结晶形态相容、对齐或改变，从而显著增加了传统纳米复合材料的物理复杂性，并为纳米级材料设计提供了新的策略。拟议研究的目标有三个方面。第一，开发一类基于在单组分和多组分聚合物混合物中分散的各向异性纳米结构的新型功能纳米复合材料。第二，提高对表面官能化纳米结构如何影响多相聚合物材料的相行为、结晶形态、流变学、固化动力学和性质的基本理解。最后，量化加工剪切场和聚合物颗粒相互作用对合成聚合物中各向异性纳米结构的排列和空间分布的影响。我们的工作将集中在表面功能化的碳纳米管（CNT）和二氧化硅纳米棒分散在模型聚合物系统。每个系统将被选择为逐步引入更大程度的复杂性的基本纳米复合材料的主题，提供新的洞察力的方法控制聚合物结构在纳米级使用各向异性纳米结构。 智力价值：拟议的研究对于科学和实际原因都很重要。例如，我们的工作利用已知的高表面/体积比的纳米结构，同时相容和增强聚合物混合物。我们还研究了，第一次，如何处理剪切场的影响分散的纳米粒子在聚合物主机的空间分布，以及如何利用这些影响可以创建具有新的核/壳传输特性的宏观对象。这项研究也是第一个利用固态变形来排列纳米复合材料中的纳米结构和聚合物分子的研究。如果成功的话，这项工作将提高对纳米复合材料的基本理解，并将有助于提高创造具有梯度性能的聚合物的最新技术水平。更广泛的影响：塔斯基吉，UAB和康奈尔大学的学生参与拟议的研究将获得材料化学，材料物理，多相聚合物液体的流动行为和纳米结构材料的固态性能方面的独特，广泛的教育。来自我们机构的学生将花时间与来自另一个机构的NIRT团队成员一起工作。这将促进参与教师之间更深入的合作研究关系，并将提高为我们的研究生和本科生提供的学习体验的质量。每个大学的学生也将接触到纳米结构材料科学和加工课程。外联工作将包括涉及K-12学生接触纳米级科学和技术的活动。