Bioinspired Piezoelectric Composite Material with Antibacterial Effect

João Pinto, Óscar Carvalho, Filipe Silva, Michael Gasik, Jorge Padrão

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Bacterial resistance is becoming more widespread due to healthcare and agriculture antibiotics excessive use. Current solutions are focused on preventing biofilm formation with chemical surface coatings (antibiotics) that kill the bacteria once they arrive on the surface. This approach makes bacteria even more multi-drug resistant. Additionally, the use of contaminated shoe soles can impart microbial dissemination in a controlled atmosphere of the healthcare and food industries. This work proposes the design, fabrication, and characterization of a bio-inspired material with an active antibacterial surface through piezoelectric surface potentials for medical and footwear applications. Barium titanate (BaTiO3) is a lead-free piezoelectric (191pC/N) bioceramic without toxicological risk. BaTiO3 presents a direct piezoelectric effect as a response to deformation. Surface potentials are directly related to bacterial adhesion inhibition and bacterial rupture through cell membrane penetration and disruption. In this sense, composites with BaTiO3 particles and Polyether-Ether-Ketone (PEEK) were produced at different percentages. The composites were mixed and hot pressed to produce samples for characterization through SEM and XRD analysis, along with bacterial adhesion with Gram-positive (Staphylococcus Aureus) and Gram-negative (Pseudomonas aeruginosa and a co-culture of both bacteria). Antibacterial properties of the functional surface are majorly dependent on material composition (percentages and phases) and process parameters (pressure and temperature).

Original languageEnglish
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2023
Subtitle of host publicationProceedings of the 2023 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2023
EditorsMichael Stucky, Gregory Wallis
PublisherMetal Powder Industries Federation (MPIF)
Pages377-387
Number of pages11
ISBN (Electronic)978-1-943694-39-6
Publication statusPublished - 2023
MoE publication typeA4 Conference publication
EventInternational Conference on Powder Metallurgy and Particulate Materials - Las Vegas, United States
Duration: 18 Jun 202321 Jun 2023

Conference

ConferenceInternational Conference on Powder Metallurgy and Particulate Materials
Abbreviated titlePowderMet
Country/TerritoryUnited States
CityLas Vegas
Period18/06/202321/06/2023

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