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APPJ and PAW assisted nanoparticle impregnation and treatment of polymers

Motivation behind this research is making more sufficient antibacterial coatings. In order to do so a new APPJ and PAW assisted route for nanoparticle impregnation into polymers is introduced. Preliminary research was done on different polymers with multiple colloidal nanoparticles, whereas a special attention was devoted to studies of PVC and PET polymer, and Au and Ag nanoparticles. Experiment. Nanoparticles used in this experiment were in their colloidal form, synthesized within this research by a process of laser ablation in liquids. That technique provides not inhalable colloidal nanoparticles of wide variety of metals with no residues or byproducts. Unlike the methods where nanoparticles are incorporated not only at the surface but in the bulk of polymer material, our method is focused on incorporating nanoparticles only to the surface, keeping the bulk material untouched. This is a cost-efficient route to incorporate nanoparticles into polymers. Within this approach, 4 methods are tested: 1) nanoparticles deposited onto the polymer surface by drop-coating method, 2) polymer surface treated with APPJ, 3) polymer surface containing nanoparticles deposited by drop- coating on plasma pre-treated polymer, and 4) polymer surface containing nanoparticles deposited by drop-coating and sequent plasma treatment after water evaporated, and 5) PAW assisted impregnation by APPJ activation of colloidal nanoparticles on top of polymer. Results of the analysis of colloidal nanoparticles exhibits a narrow size distribution which is suitable for antibacterial applications. SEM images show presence of NPs on most samples, especially on a sample not treated with APPJ (just NP drop coating) since there, nanoparticles are present only on the surface. In samples where NPs are put first and then the polymer was treated with APPJ, NPs are harder to detect due to the increased surface roughness. Some differences between PVC and PET polymers are observed, especially in roughness incensement which is more pronounced for PVC. Conclusion. The presented work shows preliminary results of constructing antibacterial coatings. Some of the methods of nanoparticle impregnation, such as combinations of APPJ treatment with PAW, are promising but additional analysis and combination of polymers and NPs is needed.

APPJ, PAW, nanoparticle impregnation, treatment of polymers

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