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Wet‐spinning assembly of continuous and macroscopic graphene oxide/polyacrylonitrile reinforced composite fibers with enhanced mechanical properties and thermal stability
Author(s) -
Zhao Renhai,
Tian Mingwei,
Qu Lijun,
Zhao Yuling,
Chen Shaojuan,
Zhu Shifeng,
Han Guangting
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46950
Subject(s) - materials science , polyacrylonitrile , composite material , dynamic mechanical analysis , thermogravimetric analysis , composite number , thermal stability , spinning , fiber , scanning electron microscope , graphene , ultimate tensile strength , chemical engineering , polymer , nanotechnology , engineering
Polyacrylonitrile (PAN) composite microfibers with different contents of graphene oxide (GO) were fabricated via wet‐spinning route in this work. Based on nonsolvent‐induced phase separation theory, N,N ‐dimethyl formamide/water mixture system was employed as coagulation bath, nonsolvent (water) diffused into PAN spinning solution and led to a quick PAN fiber solidification. Nematic liquid crystal state of GO dispersions and GO/PAN spinning solutions were determined via polarized optical microscopy images, and the morphology and structure of the composite fibers were characterized via scanning electron microscope, Transmission electron microscopy, Fourier transform infrared spectra, and X‐ray diffraction. 1 wt % GO/PAN composite fibers exhibited outstanding mechanical properties, 40% enhancement in tensile strength and 34% enhancement in Young's modulus compared with pure PAN fiber. The results of dynamic mechanical analysis indicated that the composite fiber with 1 wt % GO performed the best thermal mechanical property with 5.5 GPa and 0.139 in storage modulus and loss tangent, respectively. In addition, thermogravimetric analysis showed that thermal stability of the composite fibers enhanced with the increasing GO contents. GO/PAN composite fibers can be as the candidate of carbon fiber precursor, high performance fibers, and textiles applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46950.