A facile one step route that introduces functionality to polymer powders for laser sintering

Author:

Krumins Eduards,Crawford Liam A.,Rogers David M.ORCID,Machado FabricioORCID,Taresco Vincenzo,East MarkORCID,Irving Samuel H.,Fowler Harriet R.ORCID,Jiang LongORCID,Starr Nichola,Parmenter Christopher D. J.,Kortsen KristofferORCID,Cuzzucoli Crucitti Valentina,Avery Simon V.ORCID,Tuck Christopher J.ORCID,Howdle Steven M.ORCID

Abstract

AbstractLaser Sintering (LS) is a type of Additive Manufacturing (AM) exploiting laser processing of polymeric particles to produce 3D objects. Because of its ease of processability and thermo-physical properties, polyamide-12 (PA-12) represents ~95% of the polymeric materials used in LS. This constrains the functionality of the items produced, including limited available colours. Moreover, PA-12 objects tend to biofoul in wet environments. Therefore, a key challenge is to develop an inexpensive route to introduce desirable functionality to PA-12. We report a facile, clean, and scalable approach to modification of PA-12, exploiting supercritical carbon dioxide (scCO2) and free radical polymerizations to yield functionalised PA-12 materials. These can be easily printed using commercial apparatus. We demonstrate the potential by creating coloured PA-12 materials and show that the same approach can be utilized to create anti-biofouling objects. Our approach to functionalise materials could open significant new applications for AM.

Funder

The University of Nottingham, PhD funding for EK through the Low-Dimensional- Materials and Interfaces DTP.

Publisher

Springer Science and Business Media LLC

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