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Influence of surface characteristics of polypropylene on E. coli and S. aureus biofilms: From conventional to additive manufacturing of bioprocess equipment
KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0003-1129-908X
Uppsala University, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Manufacturing Processes.ORCID iD: 0000-0003-3656-1806
Uppsala University, Sweden.
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2024 (English)In: Applied Materials Today, ISSN 2352-9407, E-ISSN 2352-9415, Vol. 39, article id 102312Article in journal (Refereed) Published
Abstract [en]

The fast-progressing landscape of the bioprocessing industry emphasizes innovation and efficiency enhancement, propelled by the integration of advanced solutions. Additive manufacturing technologies, particularly laser-based powder bed fusion with polypropylene, are pivotal in this industrial metamorphosis. However, despite the substantial scientific effort in the field, a significant gap exists in comprehending the surface characteristics of new surfaces and their implications for bacterial attachment and biofilm formation. This arises, in part, due to the absence of comprehensive and universally applicable topographical characterization analysis specifically designed for additively manufactured-fabricated surfaces. Typically, researchers tend to rely on the commonly used roughness parameter, Sa, that primarily quantifies the average height variation across a surface. Addressing this limitation is crucial for understanding the connection between surface characteristics and bacterial attachment dynamics. Here, we propose an innovative approach using surface analysis including confocal microscopy, advanced roughness measurements, and multivariate statistical analysis to uncover the connections between bacterial attachment for Gram negative Escherichia coli and Gram positive Staphylococcus aureus in early biofilm formation with surfaces produced by standardized and additively manufactured techniques. Finally, we advocate for the adoption of a set of roughness parameters that specifically describe the dale region of the surfaces. By doing so, we intend to establish direct links between surface texture and bacterial adhesion, thus contributing significantly to the advancement of both bioprocessing and additive manufacturing research domains. 

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 39, article id 102312
Keywords [en]
3D printing; Additives; Escherichia coli; Industrial research; Multivariant analysis; Polypropylenes; Surface analysis; Surface roughness; Textures; 3-D printing; 3D-printing; Bacterial attachment; Bio-processing industries; Biofilm formation; Bioprocesses; E. coli; Roughness parameters; S. aureus; Surface characteristics; Biofilms
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:ri:diva-74709DOI: 10.1016/j.apmt.2024.102312Scopus ID: 2-s2.0-85197427802OAI: oai:DiVA.org:ri-74709DiVA, id: diva2:1887835
Funder
Vinnova, 2019-00029Swedish Foundation for Strategic Research, RMA15-0010
Note

This work is conducted within the Additive Manufacturing for the Life Sciences Competence Center (AM4Life). The authors gratefully acknowledge financial support from Sweden's Innovation Agency VINNOVA (Grant no: 2019-00029). The authors acknowledge financial support from the Swedish Foundation for Strategic Research (RMA15-0010).

Available from: 2024-08-09 Created: 2024-08-09 Last updated: 2025-09-23Bibliographically approved

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Berglund, Johan

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