Invited Speaker
Dan Chang

Dan Chang

Professor, School of Materials Science and Engineering, Northwestern Polytechnical University, China
Speech Title: Assembly of graphene oxide-based materials and preparation of high-performance fibers

Abstract: Stimulus-responsive fusion and fission phenomena are observed in both biological tissues and artificial materials. However, designing a precisely reversible fusion and fission system remains a great challenge. This report introduces the precisely reversible fusion and fission achieved by graphene oxide (GO)-based materials, along with the preparation of high-performance fibers based on this discovery. Upon dehydration, multiple GO materials fuse into a single ensemble through adaptive deformation-induced interfacial interlocking. Conversely, the ensemble precisely fissures back into the original multiple materials through rehydration-triggered interfacial repulsion. This precisely reversible fusion-fission property is extended to different traditional fibers (e.g., stainless steel wires, silks, nylon, basalt fibers, and glass fibers) and other materials (e.g., SiO2 nanoparticles, PVA, CNTs, and Na-MMT). Based on the discovery, high-performance graphene fibers and aramid fibers are prepared. The finding shows important applications in material structure customization, high-performance fiber preparation, advanced composite material design, and controllable biocatalysis.


Biography: Dan Chang, the professor in School of Materials Science and Engineering at Northwestern Polytechnical University. She got bachelor’s degree at Zhengzhou University in 2016, and then received Ph.D. degree at Zhejiang University in 2022 (advisor: Prof. Chao Gao). Her research interests include graphene and its composites, advanced structural materials, carbon/carbon composite materials, and corresponding functional applications. To date, she has published papers as first/corresponding author in Science, Matter, Advanced Materials, and Advanced Fiber Materials, etc. She has applied for 12 patents. Additionally, she has won the “National Silver Award” at the 2023 China International College Students Innovation Competition as an instructor, 2022 Jingbo Outstanding Doctoral Dissertation Award (19 recipients selected nationwide), 2021 “First Prize” in the Innovation Award of the Zhejiang Chemical Society, etc.