Highly Thermally Conductive and Mechanically Strong Graphene Fibers: From Molecular Orientation to Macroscopic Ordering

高导热性和机械强度的石墨烯纤维：从分子取向到宏观有序

• 批准号: 1742806
• 负责人: Jie Lian
• 金额: $ 38.78万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1742806&HistoricalAwards=false
• 关键词: Highly; Thermally; Conductive; Mechanically; Strong

NON-TECHNICAL DESCRIPTION: A new type of carbon fibers assembled from two-dimensional graphene sheets was recently developed with higher thermal conductivity, but with inferior mechanical properties in comparison to conventional carbon fibers. The internal structure of the graphene fibers is not well characterized and the concomitant impact on thermal-mechanical properties are not fully understood. This project targets fundamental understanding of the inner fiber structure with a focus on molecular orientation and macroscopic ordering and establishing the process-structure-property correlation. These insights may enable the development of high performance graphene fibers and unlock their potential for technology applications, e.g., as structural components in fiber-reinforced composites. New fiber structures and properties, cost-effective and environmentally-benign production, and workforce development are critical for competitiveness in innovation and manufacturing in carbon fiber industries. This project engages high-school, undergraduate and graduate students in research. Special efforts are made to involve underrepresented groups of high-school students through collaborations with local communities and academic outreach activities (including Summer@Rensselaer).TECHNICAL DETAILS: The proposed project is based on the conventional wisdoms for carbon fibers in which the fiber structure, particularly molecular orientation of graphene sheets, graphitic domains and their macroscopic ordering determine mechanical strength, Young's modulus, and thermal/electrical properties. To achieve a fundamental understanding of the fiber structure and establish the process-structure-property correlation, molecular orientation of the graphene oxide colloidal solution and the precursor graphene oxide fiber is investigated during fluid flow-assisted assembly. Macroscopic ordering of the graphene fibers is controlled by post fabrication carbonization and graphitization. Their impact on thermal-mechanical properties are being explored. By controlling the fluid flow-assisted assembly process and optimizing fiber structures, properties of the macroscopic graphene fibers can be dramatically improved. The microfluidics-enabled assembly of two-dimensional graphene sheets may enable new science for fabricating high performance carbon fibers.

非技术描述：最近开发了一种由二维石墨烯片组装而成的新型碳纤维，具有更高的导热率，但与传统碳纤维相比，机械性能较差。石墨烯纤维的内部结构尚未得到很好的表征，并且其对热机械性能的影响尚未完全了解。该项目的目标是对内部纤维结构的基本了解，重点是分子取向和宏观排序以及建立过程-结构-性能之间的关联。这些见解可能有助于开发高性能石墨烯纤维，并释放其技术应用潜力，例如作为纤维增强复合材料中的结构组件。新的纤维结构和性能、经济高效且环保的生产以及劳动力发展对于碳纤维行业创新和制造的竞争力至关重要。该项目吸引高中生、本科生和研究生参与研究。通过与当地社区的合作和学术推广活动（包括 Summer@Rensselaer），我们特别努力让代表性不足的高中生群体参与进来。技术细节：拟议的项目基于碳纤维的传统智慧，其中纤维结构、特别是石墨烯片的分子取向、石墨域及其宏观排序决定了机械强度、杨氏模量和热/电性能。为了对纤维结构有一个基本的了解并建立过程-结构-性能的相关性，在流体流动辅助组装过程中研究了氧化石墨烯胶体溶液和前体氧化石墨烯纤维的分子取向。石墨烯纤维的宏观有序性由后制造碳化和石墨化控制。正在探索它们对热机械性能的影响。通过控制流体流动辅助组装过程和优化纤维结构，可以显着改善宏观石墨烯纤维的性能。二维石墨烯片的微流体组装可能会为制造高性能碳纤维带来新的科学。

项目成果

Alignment does matter: Design thick electrodes to improve the comprehensive lithium storage performance

• DOI: 10.1016/j.carbon.2023.02.015
• 发表时间: 2023-02
• 期刊: Carbon
• 影响因子: 10.9
• 作者: Bo Nie;Mingxin Li;Tiankai Yao;Haoqing Yang;L. Duan;Juchen Zhang;Guoqing Xin;Tengxiao Liu-;Hongtao Sun;Jie Lian

Microstructure Dictating Performance: Assembly of Graphene-Based Macroscopic Structures

• DOI: 10.1021/accountsmr.0c00053
• 发表时间: 2021-01-22
• 期刊: ACCOUNTS OF MATERIALS RESEARCH
• 影响因子: 14.6
• 作者: Li, Mingxin;Lian, Jie
• 通讯作者: Lian, Jie

Copper-Coated Reduced Graphene Oxide Fiber Mesh-Polymer Composite Films for Electromagnetic Interference Shielding

• DOI: 10.1021/acsanm.0c00843
• 发表时间: 2020-05
• 作者: Mingxin Li;Kun Yang;Weiguang Zhu;Junhua Shen;J. Rollinson;M. Hella;J. Lian

Large-Area Uniaxial-Oriented Growth of Free-Standing Thin Films at the Liquid–Air Interface with Millimeter-Sized Grains

具有毫米级颗粒的液-气界面处大面积单轴定向生长的自支撑薄膜

• DOI: 10.1021/acsnano.1c07662
• 发表时间: 2022
• 期刊: ACS Nano
• 影响因子: 17.1
• 作者: Zhu, Weiguang;Zhang, Yanming;Shen, Junhua;Shi, Yunfeng;Li, Mingxin;Lian, Jie
• 通讯作者: Lian, Jie

Kinetically Controlled Growth of Sub‐Millimeter 2D Cs 2 SnI 6 Nanosheets at the Liquid–Liquid Interface

亚毫米二维 Cs 2 SnI 6 纳米片在液-液界面处的动力学控制生长

• DOI: 10.1002/smll.202006279
• 发表时间: 2020
• 期刊: Small
• 影响因子: 13.3
• 作者: Zhu, Weiguang;Shen, Junhua;Li, Mingxin;Yang, Kun;Bu, Wei;Sun, Yi‐Yang;Shi, Jian;Lian, Jie
• 通讯作者: Lian, Jie