Modification of 3D-Printed PLA Structures Using Photo-Iniferter Polymerization: Toward on-Demand Antimicrobial Water Filters

Water filtration is an important application field to ensure the accessibility of clean drinking water. As requirements and contaminants vary on a local level, adjustable filter devices and their evaluation with contaminants are required. Within this work we design modular filter devices featuring a...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2023-11, Vol.44 (22), p.e2300408-e2300408
Main Authors: Lehnen, Anne-Catherine, Hanke, Sebastian, Schneider, Matthias, Radelof, Charlotte M L, Perestrelo, Joana, Reinicke, Stefan, Reifarth, Martin, Taubert, Andreas, Arndt, Katja M, Hartlieb, Matthias
Format: Article
Language:English
Subjects:
Amino groups
Cationic polymerization
Chain transfer
Contaminants
Devices
Drinking water
Filtration
Flat surfaces
Microorganisms
Modular design
Modular equipment
Optimization
Polyimide resins
Polylactic acid
Polymerization
Polymers
Substrates
Surface properties
Three dimensional printing
Water filters
Water filtration
Water pollution
Water purification
Water sampling
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Summary:Water filtration is an important application field to ensure the accessibility of clean drinking water. As requirements and contaminants vary on a local level, adjustable filter devices and their evaluation with contaminants are required. Within this work we design modular filter devices featuring an adjustable surface functionalization. For this purpose, we create 3D-printed structures consisting of bio-based poly(lactic acid) (PLA) that are manufactured by extrusion printing. The surface of PLA is activated with amino groups that are used to install xanthates as chain transfer agents. Subsequently, photo-iniferter (PI) polymerization is used to create cationic polymer brushes on the surface of PLA substrates. Multiple surface characterization techniques are employed to prove successful growth of polymer brushes on PLA. After initial optimization studies on flat surfaces, filter devices are printed, functionalized, and used to remove bacteria from contaminated water. Significant reduction of the number of microorganisms is detected after filtration (single filtration or cycling) and contaminating organism could also be removed from freshwater samples by simple incubation with a 3D-printed filter. The herein developed setup for producing functional filter devices and probing their performance in affinity filtration is a useful platform technology, enabling the rapid testing of polymer brushes for such applications. This article is protected by copyright. All rights reserved.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.202300408