• 文献标题:   Flow rate controls microstructural alignment of extruded graphene oxide structures
  • 文献类型:   Article
  • 作  者:   WANG B, SZKOPEK T, CERRUTI M
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1016/j.carbon.2022.02.029 EA MAR 2022
  • 出版年:   2022

▎ 摘  要

Assembling graphene oxide (GO) sheets into continuous macroscopic materials such as GO fibers and membranes by extrusion method has shown promise for many applications like battery electrodes, sensors, and gas/water separation. However, controlling the microstructures and the mechanical strengths is still challenging in extruded continuous GO assembled materials (GOAMs). Here we report extruded continuous GO membranes and aerogels with flow rate controlled microstructural alignment. In extruded GO membranes, a high flow rate resulted in ultimate tensile strength (UTS) values as high as 198 MPa, 24% higher than previously reported UTS for extruded GO membranes. Extruded three-dimensional GO aerogels also have compression modulus superior to previously reported nonextruded aerogels. We attribute the improvement in UTS and compression modulus to flow-induced microstructural alignment. (C) 2022 Elsevier Ltd. All rights reserved.