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Nanocellulose-Based Inks-Effect of Alginate Content on the Water Absorption of 3D Printed Constructs.
Universidad de Cordoba, Spain.
RISE - Research Institutes of Sweden, Bioeconomy, PFI.
Universidad de Cordoba, Spain.
RISE - Research Institutes of Sweden, Bioeconomy, PFI.ORCID iD: 0000-0002-6183-2017
2019 (English)In: Bioengineering (Basel, Switzerland), ISSN 2306-5354, Vol. 6, no 3, article id E65Article in journal (Refereed) Published
Abstract [en]

2,2,6,6-tetramethylpyperidine-1-oxyl (TEMPO) oxidized cellulose nanofibrils (CNF) were used as ink for three-dimensional (3D) printing of porous structures with potential as wound dressings. Alginate (10, 20, 30 and 40 wt%) was incorporated into the formulation to facilitate the ionic cross-linking with calcium chloride (CaCl2). The effect of two different concentrations of CaCl2 (50 and 100 mM) was studied. The 3D printed hydrogels were freeze-dried to produce aerogels which were tested for water absorption. Scanning Electronic Microscopy (SEM) pictures demonstrated that the higher the concentration of the cross-linker the higher the definition of the printed tracks. CNF-based aerogels showed a remarkable water absorption capability. Although the incorporation of alginate and the cross-linking with CaCl2 led to shrinkage of the 3D printed constructs, the approach yielded suitable porous structures for water and moisture absorption. It is concluded that the 3D printed biocomposite structures developed in this study have characteristics that are promising for wound dressings devices.

Place, publisher, year, edition, pages
2019. Vol. 6, no 3, article id E65
Keywords [en]
3D printing, absorption, nanocellulose, wound dressings
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39712DOI: 10.3390/bioengineering6030065PubMedID: 31366050OAI: oai:DiVA.org:ri-39712DiVA, id: diva2:1341918
Available from: 2019-08-12 Created: 2019-08-12 Last updated: 2019-08-12Bibliographically approved

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Chinga-Carrasco, Gary

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