Rational Design and Processing of Multifunctional Nanocomposites

多功能纳米复合材料的合理设计与加工

• 批准号: 1562075
• 负责人: Zhiqun Lin
• 金额: $ 30万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-01 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1562075&HistoricalAwards=false
• 关键词: Rational; Design; Processing; Multifunctional; Nanocomposites

Nanocomposites composed of polymer matrix and nanoparticles offer a vast design-space of potential material properties, depending greatly on the properties of the two constituents and their spatial arrangement. Composites inherit good flexibility and processability from the polymer matrix and desirable features such as mechanical strength, unique optical, electrical, or magnetic properties, as well as conductivity and catalytic activity from nanoparticles. More importantly, they often impart new properties due to the strong coupling effect and strategic arrangement of the nanoparticles in the polymer matrix. This award supports fundamental research on rational design and processing of multifunctional nanocomposites composed of multiferroic core/shell nanoparticles and block copolymers. This research will enhance the current understanding of the structure-property relationships for these novel polymer-based, multifunctional nanostructured materials. These materials will be used in devices for applications such as advanced spintronics, capacitors, actuators, transducers, electromagnetic sensors and communication. The research project will be integrated with nanoscience education through the involvement of graduate students, undergraduate students, high school science teachers, and high school students in a multilevel learning experience.Magnetoelectric multiferroics exhibit both magnetic order and electrical polarization in the same compound. They are recognized as next generation multifunctional materials. The strong coupling between the ferroelectric and ferromagnetic orders in these materials renders a magnetic field-induced electrical polarization, and conversely, an electric field-induced magnetization. The ability to selectively incorporate multiferroic core/shell nanoparticles into the desired block copolymer domains to yield block copolymer/multiferroic nanoparticle multifunctional nanocomposites with long-range hierarchical order may open up a new avenue for developing miniaturized multifunctional electromagnetic materials and devices with controlled dielectric permittivity and magnetic permeability. This research aims to rationally design and process multifunctional nanocomposites with long-range hierarchical order. The research team will design and engineer monodisperse multiferroic nanoparticles tethered with polymers on the surface, process multiferroic nanocomposites via incorporating multiferroic core/shell nanoparticles within the target block of block copolymer, and explore the ferroelectric and ferromagnetic properties of nanocomposites.

由聚合物基体和纳米粒子组成的纳米复合材料提供了潜在材料特性的巨大设计空间，这在很大程度上取决于两种成分的特性及其空间排列。复合材料继承了聚合物基体的良好柔韧性和可加工性，以及纳米粒子的机械强度、独特的光学、电学或磁性特性以及导电性和催化活性等理想特性。更重要的是，由于纳米粒子在聚合物基体中的强耦合效应和策略排列，它们常常赋予新的性能。该奖项支持由多铁核/壳纳米粒子和嵌段共聚物组成的多功能纳米复合材料的合理设计和加工的基础研究。这项研究将增强目前对这些新型聚合物基多功能纳米结构材料的结构-性能关系的理解。这些材料将用于先进自旋电子学、电容器、执行器、传感器、电磁传感器和通信等应用的设备中。该研究项目将通过研究生、本科生、高中科学教师和高中生的多层次学习体验与纳米科学教育相结合。磁电多铁性材料在同一化合物中同时表现出磁序和电极化。它们被认为是下一代多功能材料。这些材料中铁电级和铁磁级之间的强耦合产生磁场感应的电极化，反之，产生电场感应的磁化。将多铁性核/壳纳米粒子选择性地结合到所需的嵌段共聚物域中以产生具有长程分级有序的嵌段共聚物/多铁性纳米粒子多功能纳米复合材料的能力可能为开发具有受控介电常数和介电常数的小型化多功能电磁材料和器件开辟了新途径。磁导率。本研究旨在合理设计和加工具有长程分级顺序的多功能纳米复合材料。研究小组将设计和设计表面与聚合物相连的单分散多铁纳米粒子，通过将多铁核/壳纳米粒子纳入嵌段共聚物的目标嵌段来加工多铁纳米复合材料，并探索纳米复合材料的铁电和铁磁性能。