Abstract
In the present study, the poly (vinyl alcohol) (PVA)/graphene oxide (GO) hydrogels were synthesized by the repeated freeze-thaw method. The microstructure of PVA/GO hydrogels was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM). The effects of GO content, lubrication condition, load and sliding speed on the friction properties of PVA/GO hydrogels were investigated. The results showed that the fracture morphology of PVA/GO hydrogels showed a layered-structure with uniformly dispersed GO sheets in PVA matrix. The friction coefficient of PVA/GO hydrogels decreased with the increase of GO content and sliding speed. With the increase of bovine serum and load, the friction coefficient of hydrogels decreased first and then increased.
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