Abstract
The investigations of the surface physicochemical properties of polyvinyl alcohol (PVA) modified by magnesium and zinc ion implantation to doses of 1∙1015 and 1∙1016 ion/cm2 and energies of 24 keV (for Zn1.2+) and 30 keV (for Mg1.5+) are described. According to the TRIDYN modeling, the influence of ion irradiation on chemical and phase state as well as mechanical properties exceed the projective range of ions; therefore, during the ion implantation of PVA, the long-range effect take place due to radiation diffusion and thermal restructuring of the material. X-ray photoelectron spectroscopy reveals that after ion beam treatment of polyvinyl alcohol, magnesium and zinc are in both metallic and oxidized states. Ion implantation leads to the significant change in the chemical state of the polyvinyl alcohol surface. The surface chemistry modification is assumed to be caused by thermal and radiation effects on the material. The surface morphology changes relate to both types of the implanted ions and depend on the implantation dose only. Surface morphology modification leads to the increase of free surface energy. Restructuring of polyvinyl alcohol is accompanied by an increase in the degree of crystallinity and, as a result, microhardness increasing.
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