▎ 摘　　要

We investigated the influence of of graphene oxide (GO) on the tensile properties of high-strength and high-modulus poly(vinyl alcohol) (PVA) fibers. The fibers were prepared by gel-spinning of PVA/dimethyl sulfoxide solutions containing a small amount (0.5 wt%) of GO and hot drawing. It was found that GO in the PVA matrix was well dispersed via hydrogen bonds, and was oriented with respect to the fiber axis. For the PVA fiber with a strength of over 2 GPa and a modulus of 40-50 GPa, addition of GO brought about a small decrease in strength and elongation at break and increase in Young's modulus by 3-5 GPa. We explain the change of the tensile properties by GO addition through the strength relationship between shear stress and adhesion force acting at the PVA-GO interface. Addition of GO increases not the tensile strength but the Young's modulus, improving the performance of PVA fibers.