Excellence in Research: Development of a Non-Fluorinated Etching Procedure to Prepare MXene Hybrid Materials for Composite Applications

卓越研究：开发非氟化蚀刻工艺来制备用于复合材料应用的 MXene 混合材料

基本信息

批准号：
2101001
负责人：
Natalie Arnett
金额：
$ 70万
依托单位：
Florida Agricultural and Mechanical University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-06-15 至 2025-05-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2101001&HistoricalAwards=false
关键词：
Excellence Research Development Non Fluorinated

项目摘要

NON-TECHNICAL DESCRIPTION: MXenes are 2D materials with excellent electrical/magnetic properties for use in a number of applications such as electromagnetic radiation shielding, supercapacitors and batteries. In this project, a team of researchers at the Florida A & M University (FAMU), FAMU-FSU (Florida State University) College of Engineering (COE), and Clark Atlanta University (CAU-Chemistry), aim to prepare a class of MXenes with homogenous surface functionality using a less hazardous procedure. This novel method of synthesizing MXenes will open new avenues of developing hybrid materials for different applications and the generation of unique composite materials. Subsequently, this project seeks to increase the number of undergraduate and graduate minority students enrolling in engineering and science programs to pursue advanced degrees through involvement in MXene materials research. Student interest about graduate programs and summer research opportunities will also increase, leading to the establishment of a 2+3 dual-degree engineering program. TECHNICAL DETAILS: MXenes are derived from MAX phases, where the A element, usually aluminum, is removed by etching with toxic hydrogen fluoride. The systematic investigation of MXene with a novel non-fluorine based method using the following research aims to understand the synthesis/etching/exfoliation processes using a non-fluorinated etching procedure allows for control of the resultant microstructure and macroscopic properties crucial to MXenes applications: 1) Preparing MXenes with improved stability and homogenous surface functionality using non-fluorinated etching techniques on MAX phases. 2) Understanding the impact of this etching process on the MXene chemistry, morphology, and chemical environment on rheological, electronic, and magnetic/spin properties. 3) Building a MXene model based on specific functional groups terminations using thermodynamic stability calculations of bromine or other functional group terminations, geometry optimizations for single and bilayer MXene structures, and vibrational frequency calculations to compare with experimental results. 4) Developing novel MXene composite structures for manufacturing devices with desirable magnetic and electronic properties. 5) Exploring the suitability of a novel etch method for other types of MAX phases. The findings from this EiR project will contribute to institutional change by aligning the qualities of interdisciplinary research with educational outcomes and exposing students to new chemical synthesis and exfoliation techniques, instrumentation at the National High Magnetic Field Lab (NHMFL) national user facility, and 3D printing using state-of-the-art equipment to fabricate MXene structures and devices.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.

非技术描述：MXENES是2D材料，具有出色的电气/磁性特性，用于在许多应用中，例如电磁辐射屏蔽，超级电容器和电池。在该项目中，佛罗里达农工大学（FAMU），FAMU-FSU（FAMU）（佛罗里达州立大学）工程学院（COE）和克拉克亚特兰大大学（CAU-CHEMISTRION）的研究人员旨在使用较小的危险程序准备一类具有同质表面功能的MXENES。这种合成MXENES的新型方法将开辟新的途径，以开发用于不同应用和产生独特复合材料的混合材料。随后，该项目旨在增加参加工程和科学课程的本科和研究生少数族裔学生的数量，以通过参与MXENE材料研究来攻读高级学位。学生对研究生课程和夏季研究机会的兴趣也将增加，从而导致建立2+3个双度工程计划。技术细节：MXENES源自最大相，其中A元素（通常是铝）通过用氟化物蚀刻来去除。使用以下研究使用一种新型的非基于非氟的方法对MXENE进行对MXENE的系统研究旨在使用非氟化蚀刻程序了解合成/蚀刻/去角质过程，允许控制最终的微观结构和大型表面上的微观结构和大型表面上的特性。最大阶段的技术。 2）了解这种蚀刻过程对MXENE化学，形态和化学环境对流变，电子和磁性/自旋特性的影响。 3）基于特定官能团终止的MXENE模型，使用溴或其他功能组终止的热力学稳定性计算，单层和双层MXENE结构的几何优化以及振动频率计算，以与实验结果相比。 4）开发用于具有理想磁性和电子特性的制造设备的新型MXENE复合结构。 5）探索一种新型蚀刻方法对其他类型的最大相的适用性。该EIR项目的发现将通过使跨学科研究的质量与教育成果保持一致，并使学生了解新的化学合成和剥落技术，国家高磁场实验室（NHMFL）国家用户设施的仪器以及使用正式的MEXENE MESTER state and devute and devites nectiS nectore new.值得通过基金会的智力优点和更广泛的影响审查标准来通过评估来支持。