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Bioinspired 3D printable pectin-nanocellulose ink formulations
University Politehnica of Bucharest, Romania.
University Politehnica of Bucharest, Romania.
University Politehnica of Bucharest, Romania.
University Politehnica of Bucharest, Romania.
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2019 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 220, p. 12-21Article in journal (Refereed) Published
Abstract [en]

The assessment of several ink formulations for 3D printing based on two natural macromolecular compounds is presented. In the current research we have exploited the fast crosslinking potential of pectin and the remarkable shear-thinning properties of carboxylated cellulose nanofibrils, which is known to induce a desired viscoelastic behavior. Prior to 3D printing, the viscoelastic properties of the polysaccharide inks were evaluated by rheological measurements and injectability tests. The reliance of the printing parameters on the ink composition was established through one-dimensional lines printing, the base units of 3D-structures. The performance of the 3D-printed structures after ionic cross-linking was evaluated in terms of mechanical properties and rehydration behavior. MicroCT was also used to evaluate the morphology of the 3D-printed objects regarding the effect of pectin/nanocellulose ratio on the geometrical features of scaffolds. The proportionality between the two polymers proved to be the determining factor for the firmness and strength of the printed objects. © 2019

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. Vol. 220, p. 12-21
Keywords [en]
3D printing, Cellulose nanofibrils, Hydrogels, Pectin, Polysaccharide, Cellulose, Computerized tomography, Nanocellulose, Nanofibers, Polysaccharides, Shear flow, Shear thinning, Viscoelasticity, 3-D printing, Macromolecular compounds, Rehydration behavior, Rheological measurements, Visco-elastic behaviors, Viscoelastic properties, 3D printers
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38922DOI: 10.1016/j.carbpol.2019.05.026Scopus ID: 2-s2.0-85065922721OAI: oai:DiVA.org:ri-38922DiVA, id: diva2:1318951
Note

Funding details: 228147; Funding details: PN-III-P1-1.2-PCCDI-2017-0782; Funding text 1: The 3D printing experiments and MicroCT analysis were possible due to European Regional Development Fund through Competitiveness Operational Program 2014-2020, Priority axis 1, ID P_36_611, MySMIS code 107066, INOVABIOMED. A. Lungu would like to thank for the financial support provided by a grant of the Romanian Ministery of Research and Innovation, CCCDI – UEFISCDI, project number PN-III-P1-1.2-PCCDI-2017-0782 /REGMED – project 4 TUMOR, within PNCDI III. The authors would like to acknowledge the helpful discussions with Claudiu Patrascu on matters regarding rheology. Parts of this work has also been funded by the Research Council of Norway through the NORCEL project (Grant no. 228147 ). Appendix A

Available from: 2019-05-29 Created: 2019-05-29 Last updated: 2019-05-29Bibliographically approved

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Heggset, Ellinor BSyverud, Kristin

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