Expanded graphene oxide fibers with high strength and increased elongation.

Autor:	Ugale AD; Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University Suwon 440-746 Republic of Korea jbyoo@skku.edu., Chi L; Advanced Materials Science and Engineering, Sungkyunkwan University Suwon 440-746 Republic of Korea jy.choi@skku.edu., Kim MK; Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University Suwon 440-746 Republic of Korea jbyoo@skku.edu., Chae S; Advanced Materials Science and Engineering, Sungkyunkwan University Suwon 440-746 Republic of Korea jy.choi@skku.edu., Choi JY; Advanced Materials Science and Engineering, Sungkyunkwan University Suwon 440-746 Republic of Korea jy.choi@skku.edu., Yoo JB; Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University Suwon 440-746 Republic of Korea jbyoo@skku.edu.; Advanced Materials Science and Engineering, Sungkyunkwan University Suwon 440-746 Republic of Korea jy.choi@skku.edu.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2019 Jan 31; Vol. 9 (8), pp. 4198-4202. Date of Electronic Publication: 2019 Jan 31 (Print Publication: 2019).
DOI:	10.1039/c8ra09464k
Abstrakt:	We report the role of chemically expanded graphite in the fabrication of high-performance graphene oxide fibers by wet spinning. X-ray diffraction peak showed that the interplanar distance of the expanded graphene oxide (EGO) fiber was more than that of graphene oxide (GO) fiber due to the expanded graphite. X-ray photon spectroscopy analysis revealed that EGO was more oxidized than GO. The hydrogen bonding network and secondary intermolecular interaction made the EGO aqueous solution more stable and crystalline, and it was able to be stretched in the coagulation bath. Morphological analysis showed the excellent alignment and compactness of EGO sheets in the fibers. The increased interplanar distance between the EGO sheets favored the edge-to-edge interaction more than the basal plane interaction within the fiber, thus resulting in high mechanical strength (492 MPa) and increased elongation (6.1%). Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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