Drawing highly ordered MXene fibers from dynamically aggregated hydrogels  

作　　者：Shengyang Zhou Xuan Li Yilin Zhang Joseph Halim Chao Xu Johanna Rosen Maria Strømme 

机构地区：[1]College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China [2]Nanotechnology and Functional Materials, Department of Materials Sciences and Engineering, The Ångström Laboratory, Uppsala University, Uppsala, 751 03, Sweden [3]Materials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 581 83, Sweden

出　　处：《Nano Research》2024年第11期9815-9821,共7页纳米研究（英文版）

基　　金：financially supported this work through a Project Grant(No.KAW2020.0033);We acknowledge Myfab at Uppsala University for providing facilities and experimental support;Myfab is funded by the Swedish Research Council(No.2019-00207)as a Swedish national research infrastructure;The authors acknowledge the financial support by the Fundamental Research Funds for the Central Universities of China(No.20822041H4077);ÅForsk Foundation.

摘　　要：Assembly of two-dimensional (2D) nanomaterials into well-organized architectures is pivotal for controlling their function and enhancing performance. As a promising class of 2D nanomaterials, MXenes have attracted significant interest for use in wearable electronics due to their unique electrical and mechanical properties. However, facile approaches for fabricating MXenes into macroscopic fibers with controllable structures are limited. In this study, we present a strategy for easily spinning MXene fibers by incorporating polyanions. The introduction of poly(acrylic acid) (PAA) into MXene colloids has been found to alter MXene aggregation behavior, resulting in a reduced concentration threshold for lyotropic liquid crystal phase. This modification also enhances the viscosity and shear sensitivity of MXene colloids. Consequently, we were able to draw continuous fibers directly from the gel of MXene aggregated with PAA. These fibers exhibit homogeneous diameter and high alignment of MXene nanosheets, attributed to the shear-induced long-range order of the liquid crystal phase. Furthermore, we demonstrate proof-of-concept applications of the ordered MXene fibers, including textile-based supercapacitor, sensor and electrical thermal management, highlighting their great potential applied in wearable electronics. This work provides a guideline for processing 2D materials into controllable hierarchical structures by regulating aggregation behavior through the addition of ionic polymers.

关 键 词：two-dimensional(2D)materials liquid crystal phase fiber spinning wearable electronics 

分 类 号：TQ427.26[化学工程]