Plasticized polyethylene glycol as sacrificial support and template material for syringe-based 3D-printing
2015 (English)Manuscript (preprint) (Other academic)
Syringe-based 3D-printing is a powerful additive manufacturing method for fabricating short runs (small volumes) of components from multiple materials with a wide range of viscosities. However, objects that are hollow or not in complete contact with the printer’s stage are difficult to fabricate. Using a sacrificial template as a supporting layer enables bottom-up construction of complex structures. Template materials based on polyethylene glycol (PEG) plasticized with organic carbonates to tune their rheological (shear-thinning) and thermal (crystallization) properties have been evaluated, including results from rheometry, differential scanning calorimetry, dissolution rate, chemical compatibility with polydimethylsiloxane (PDMS), and general functionality in a syringe-based 3D-printer. A family of such blends yields material that is easily printed, is stable over time, is soluble in water, and can support other materials and larger structures without collapsing. These mixtures are proposed for use with other extrudable or mouldable materials to enable 3D-printed devices with complex unsupported geometries.
Place, publisher, year, edition, pages
3D-Printing, polyethylene glycol, organic carbonates, sacrificial template, extrusion
Physical Sciences Physical Chemistry
IdentifiersURN: urn:nbn:se:liu:diva-121250OAI: oai:DiVA.org:liu-121250DiVA: diva2:852801