Publications by authors named "Piotr Gruber"

Article Synopsis
  • The study explored how different metallic microfillers (spherical silver, spherical copper, and dendritic copper) affect the ability of polyamide 12 (PA12) to prevent microorganism growth on surfaces made using laser-based powder bed fusion technology, targeting applications in hospitals where disinfection is common.
  • Composite powders were created with varying concentrations of microfillers and tested against common hospital pathogens, along with assessing their safety using human cell lines.
  • While the addition of copper or silver improved antibacterial properties, it also highlighted varying levels of toxicity to human cells, suggesting the need for more research to confirm their safety for use in medical environments.
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The laser-based powder bed fusion of polymers (PBF-LB/P) process often utilizes a blend of powders with varying degrees of degradation. Specifically, for polyamide 12, the traditional reuse schema involves mixing post-processed powder with virgin powder at a predetermined ratio before reintroducing it to the process. Given that only about 15% of the powder is utilized in part production, and powders are refreshed in equal proportions, there arises a challenge with the incremental accumulation of material across build cycles.

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Biofilm-related ocular infections can lead to vision loss and are difficult to treat with antibiotics due to challenges with application and increasing microbial resistance. In turn, the design and testing of new synthetic drugs is a time- and cost-consuming process. Therefore, in this work, for the first time, we assessed the in vitro efficacy of the plant-based abietic acid molecule, both alone and when introduced to a polymeric cellulose carrier, against biofilms formed by , , and in standard laboratory settings as well as in a self-designed setting using the topologically challenging surface of the artificial eye.

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In the era of the coronavirus pandemic, one of the most demanding areas was the supply of healthcare systems in essential Personal Protection Equipment (PPE), including face-shields and hands-free door openers. This need, impossible to fill by traditional manufacturing methods, was met by implementing of such emerging technologies as additive manufacturing (AM/3D printing). In this article, Poly(lactic acid) (PLA) filaments for Fused filament fabrication (FFF) technology in the context of the antibacterial properties of finished products were analyzed.

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We present a comparison of the influence of the conditioning temperature of microspheres made of medical grade poly(L-lactide) (PLLA) and polylactide with 4 wt % of D-lactide content (PLA) on the thermal and structural properties. The microspheres were fabricated using the solid-in-oil-in-water method for applications in additive manufacturing. The microspheres were annealed below the glass transition temperature (T), above T but below the onset of cold crystallization, and at two temperatures selected from the range of cold crystallization corresponding to the crystallization of the α' and α form of poly(L-lactide), i.

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