Controlled Nanoparticle Size Modifications and Functionalizations through controlled polymeric Nanonetwork Expansion

通过受控聚合物纳米网络扩展控制纳米颗粒尺寸改性和功能化

基本信息

批准号：
1808664
负责人：
Eva Harth
金额：
$ 45万
依托单位：
University of Houston
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-15 至 2021-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1808664&HistoricalAwards=false
关键词：
Controlled Nanoparticle Size Modifications Functionalizations

项目摘要

Plastics that are composed from organic networks are one of the most widely used materials. However, most polymer networks are difficult to manipulate once the material is formed. The research group of Professor Eva Harth at the University of Houston aims to develop robust synthetic methods for the fabrication of tiny organic network structures (of dimensions much smaller than the width of hair) with the ability to modify a parent structure into various other networks of different sizes and functions. The ability to add functions to, modify composition of, or expand the network to allow for repair would broaden the applications of nano-scale polymer networks. This interdisciplinary project educates graduate and undergraduate students in STEM fields. Rising high school seniors and seniors have the opportunity to engage in this research through the Welch Summer Scholars Program.This project focuses on the preparation of photoresponsive nanomaterials and their manipulation in dimension, molecular weight and chemical functional groups. The research team of Professor Harth is establishing methods to synthesize photogrowable nanonetworks from a variety of degradable and non-degradable polymer backbones and cross-linking units containing trithiocarbonate units. Photoinduced polymerizations in the presence and absence of photoredox catalysts are utilized for the dynamic growth to expand the networks and introduce functional monomers into the existing schaffolds. Conditions of photo-controlled radical polymerizations for these expansion processes are thoroughly investigated as these determine the final dispersity of the network. Ultimately, this research is directed to test the capability and range of manipulation which is possible by applying photo-controlled radical polymerization techniques to generate the next generation of nano- and micron scale network materials.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.

由有机网络组成的塑料是使用最广泛的材料之一。但是，一旦形成材料，大多数聚合物网络就难以操纵。休斯顿大学的伊娃·哈斯（Eva Harth）教授的研究小组旨在开发可靠的合成方法，用于制造微小的有机网络结构（比头发宽度要小得多），能够将父级结构修改为不同大小和功能的其他各种网络。添加功能，修改或扩展网络以进行维修的功能的能力将扩大纳米级聚合物网络的应用。这个跨学科的项目对STEM领域的毕业生和本科生进行了教育。高中的高中生和老年人有机会通过韦尔奇夏季学者计划从事这项研究。该项目着重于光反应纳米材料的制备及其在维度，分子量和化学官能团中的操纵。 Harth教授的研究团队正在建立从各种可降解和不可降解的聚合物骨架和包含三硫代碳酸氢盐单元的交联单元中合成可光处理的纳米网的方法。在存在和不存在光毒催化剂的情况下，光诱导的聚合用于动态增长来扩展网络并将功能单体引入现有的Schaffolds。这些扩展过程的照片控制的自由基聚合的条件得到了彻底研究，因为这些条件决定了网络的最终分散性。最终，这项研究旨在测试操纵的能力和范围，通过应用照片控制的自由基聚合技术来生成下一代纳米和微米尺度网络材料的下一代材料。这项奖项反映了NSF的法定任务，并通过使用该基金会的知识优点和广泛的影响来评估NSF的法定任务。