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    Öğe
    Experimental investigations on metallization in the surface modified additively manufactured plastic substrates using DC sputtering
    (Sage Publications Ltd, 2024) Aktitiz, Ismail; Daricik, Fatih; Aydin, Alkim; Aydin, Kadir
    The application of copper surface coating to plastic structures offers numerous advantages, including high thermal and electrical conductivity, improved mechanical properties, good corrosion resistance, decorative applications, and enhancements in working temperatures. Besides these advantages, producing plastic structures with 3D printing and applying surface coating enables the final structures to become functional plastic structures adaptable to different fields. In this study, 3D plastic structures were produced using the fused deposition modeling method. Pristine, dichloromethane dipping, dichloromethane vapor, cold oxygen plasma, and mechanical abrasion surface treatments were applied to determine the optimal surface treatment between copper and the plastic substrate before copper coating. Subsequently, copper coating on plastic structures was completed using the DC sputtering technique. The surface topography, optical, electrical, and structural properties of the produced plastic structures were examined. According to X-ray diffraction analysis results, the (111), (200), (220), and (311) crystal planes confirm the presence of copper. The electrical conductivity values of the plastic structures reached 7.87 x 105 S/m. Contact angle measurement results indicate that the applied surface treatments increased the contact angles to 88.309 degrees, leading the coated plastic structures to exhibit a more hydrophobic behavior.
  • [ X ]
    Öğe
    Metallization of 3D Printed Polylactic Acid Polymer Structures via Radio-Frequency Sputtering
    (Springer, 2024) Aktitiz, Ismail; Daricik, Fatih; Aydin, Alkim; Aydin, Kadir
    The metallization of polymer structures eliminates disadvantages such as low electrical conductivity, undesirable mechanical properties, degradation under different environmental conditions such as UV radiation and humidity, and poor thermal properties, thereby enabling the achievement of more functional polymer structures. 3D printing provides production flexibility by allowing the manufacture of polymer, ceramic, metal, and composite materials with any level of complexity and intricacy. This study aims to investigate the improvement of the drawbacks associated with polymers, by combining the advantages of polymers and metals through 3D printing and surface modification. The newly acquired features will offer researchers and users significant freedom in various applications. Polylactic acid was used to additively manufacture the polymer structures by using fused deposition modeling. Subsequently, the surfaces of polymer structures were subjected to surface treatment methods: as-printed, dichloromethane dipping, dichloromethane vapor, cold oxygen plasma, and sandpaper. The metallization process was completed using the RF sputtering technique with aluminum as the target material. To examine the morphological, structural, optical, and electrical properties of the metalized structures, various analyses were conducted, including scanning electron microscopy, energy-dispersive spectroscopy analysis, atomic force microscopy, x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) analysis, ultraviolet-visible-near-infrared (UV-VIS-NIR) analysis, contact angle measurement, ellipsometry analysis, and electrical resistance measurement. The results showed improvements in surface roughness due to the applied surface treatments. EDX and XRD analyses confirmed the presence of aluminum in the polymer structure. Electrical conductivity values of 0.32 x 106 S m-1 were achieved at a thickness of 1000 nm. Contact angles increased up to 91.728 degrees.