Preliminary Study of the Bactericide Properties of Biodegradable Polymers (PLA) with Metal Additives for 3D Printing Applications

  1. López-Camacho, Anyul 23
  2. Magaña-García, Dulce 1
  3. Grande, María José 1
  4. Carazo-Álvarez, Daniel 4
  5. La Rubia, M. Dolores 2
  1. 1 Health Sciences Department, University of Jaén, 23071 Jaén, Spain
  2. 2 Chemical, Environmental and Materials Engineering Department, University of Jaén, 23071 Jaén, Spain
  3. 3 Smart Materials 3D, Polígono Industrial El Retamar, 7, 23680 Jaén, Spain
  4. 4 Mechanical and Mining Engineering Department, University of Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain
Revista:
Bioengineering

ISSN: 2306-5354

Año de publicación: 2023

Volumen: 10

Número: 3

Páginas: 297

Tipo: Artículo

DOI: 10.3390/BIOENGINEERING10030297 GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Bioengineering

Resumen

Plastic is a highly used material in various sectors. Due to its plentiful availability in the environment, microorganism surface contamination is a risk. The aim of this work is to achieve bactericidal capacity in plastics that reduces the microorganism’s colonization risk and, consequently, reduces the chances of having an infection with E. coli and Listeria monocytogenes bacteria. Using polylactic acid (PLA) as the polymeric matrix, mixtures in concentrations of metal additive of ions of silver (Ag) R148 and S254 in 1% and 2% have been studied and manufactured. The materials are developed on an industrial scale through a process that proceeds as follows: (I) a mixture of polymer and additive in a double-screw compounder to obtain the compound in different concentrations, (II) the manufacture of filaments with a single-screw extruder, (III) 3D printing parts. Therefore, materials are evaluated in the form of powder, pellets and printed pieces to ensure their antibacterial effectiveness throughout the manufacturing process. The results of the research show antibacterial effectiveness for E. coli and Listeria monocytogenes of metal additives and polymeric compounds for all manufacturing phases on an industrial scale, with the effectiveness for additive R148 predominating at a concentration of 2%, demonstrating its microbial efficacy on surfaces with potential application in medicine.

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