Facile Fabrication of Polyvinyl Alcohol/Edge-Selectively Oxidized Graphene Composite Fibers

Abstract

Graphene derivatives are effective nanofillers for the enhancement of the matrix mechanical properties; nonetheless, graphene oxide (GO), reduced GO, and exfoliated graphene all present distinct advantages and disadvantages. In this study, polyvinyl alcohol (PVA) composite fibers have been prepared using a recently reported graphene derivative, i.e., edge-selectively oxidized graphene (EOG). The PVA/EOG composite fibers were simply fabricated via conventional wet-spinning methods; thus, they can be produced at the commercial level. X-ray diffractometry, scanning electron microscopy, and two-dimensional wide-angle X-ray scattering analyses were conducted to evaluate the EOG dispersibility and alignment in the PVA matrix. The tensile strength of the PVA/EOG composite fibers was 631.4 MPa at an EOG concentration of 0.3 wt %, which is 31.4% higher compared with PVA-only fibers (480.6 MPa); compared with PVA composite fibers made with GO, which is the most famous water-dispersible graphene derivative, the proposed PVA/EOG ones exhibited about 10% higher tensile strength. Therefore, EOG can be considered an effective nanofiller to enhance the strength of PVA fibers without additional thermal or chemical reduction processes.

Effect of mechanical treatments on orientation behavior and spectral properties of azoderivative dyes incorporated in poly(vinyl alcohol) films

“…Among the commercial polymers used for dyeing purposes, poly(vinyl alcohol) (PVOH) is one of the most encountered polymers in the literature and has attracted huge attention due to its high optical clarity, mechanical stability, biodegradability, environmental‐friendly fabrication process, and compatibility with many compounds. [ 14‐17 ] Many studies are focused on the optical and spectral properties of the pure or dye‐containing PVOH subjected to various stretching degrees. Tanizaki [ 18,19 ] inserted crystal violet, auramine yellow, and pinacyanol iodide in PVOH and has determined the induced dichroism as a function of the stretch rate.…”

Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries

“…The density of the CNTF was obtained from the calculation of a cross-sectional area and linear density of CNTF, which is 0.8 g/cm 3 in this work. The specific tensile strength of the CNTF was characterized using a universal testing machine (3344, Instron, Norwood, MA, USA) with the ASTM C1557 method, as described in our previous article [23]. The gauge length of the sample was 1 cm and the crosshead speed was 0.3 mm/min.…”

Birefringence of Thin Uniaxial Polymer Films Estimated Using the Light Polarization Ellipse

“…In medicine, PVA foils are used as biomaterials due to their degradability, in drug delivery, in tissue replacement for improving or correcting human organs [32][33][34][35].…”