Development of mechanically enhanced polycaprolactone composites by a functionalized titanate nanofiller for melt electrowriting in 3D printing
|
Accepted Version
(PDF 2MB)
69541117. Available under License Creative Commons Attribution Non-commercial 4.0. |
Description
Three-dimensional (3D) printing technologies are widely applied in various industries and research fields and are currently the subject of intensive investigation and development. However, high-performance materials that are suitable for 3D printing are still in short supply, which is a major limitation for 3D printing, particularly for biomedical applications. The physicochemical properties of single constituent materials may not be sufficient to meet the needs of modern biotechnology development and production. To enhance the materials’ performance and broaden their applications, this work designed and tested a series of titanate nanofiller (nanowire and nanotube)-enhanced polycaprolactone (PCL) composites that were 3D-printable and provided superior mechanical properties. By grafting two different functional groups (phenyl- and thiol-terminated ligands), the nanofiller surface showed improved hydrophobicity, which significantly improved their dispersion in the PCL matrix. After characterizing the surface modification, we evaluated the significance of the homogeneity of the ceramic nanofiller in terms of printability, formability, and mechanical strength. Melt electrowriting additive manufacturing was used to fabricate microfibers of PCL and PCL/nanofiller composites. Improved nanofiller dispersion enabled intact and uniform sample morphology, and in contrast, nanofiller aggregation greatly varied the viscosity during the printing process, which could result in poorly printed structures. Importantly, the modified ceramic/PCL composite delivered enhanced and stable mechanical properties, where its Young’s modulus was measured to be 1.67 GPa, which is more than 7 times higher compared to that of pristine PCL (0.22 GPa). Retaining the cell safety properties (comparable to PCL), the concept of enhancing biocompatible polymers with modified nanofillers shows great potential in the field of customized 3D printing for biomedicine.
Impact and interest:
Citation counts are sourced monthly from Scopus and Web of Science® citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.
Full-text downloads:
Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.
ID Code: | 205735 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Item Type: | Contribution to Journal (Journal Article) | ||||||||||
Refereed: | Yes | ||||||||||
ORCID iD: |
|
||||||||||
Measurements or Duration: | 14 pages | ||||||||||
Additional URLs: | |||||||||||
DOI: | 10.1021/acsami.0c14831 | ||||||||||
ISSN: | 1944-8244 | ||||||||||
Pure ID: | 69541117 | ||||||||||
Divisions: | Current > Research Centres > Centre for Materials Science Current > Research Centres > Centre for Biomedical Technologies ?? 1479430 ?? Past > Institutes > Institute of Health and Biomedical Innovation Past > QUT Faculties & Divisions > Science & Engineering Faculty Current > QUT Faculties and Divisions > Faculty of Science Current > Schools > School of Chemistry & Physics Current > QUT Faculties and Divisions > Faculty of Engineering Current > Schools > School of Mechanical, Medical & Process Engineering |
||||||||||
Copyright Owner: | 2020 American Chemical Society | ||||||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||||||
Deposited On: | 27 Oct 2020 02:17 | ||||||||||
Last Modified: | 30 Jul 2024 00:33 |
Export: EndNote | Dublin Core | BibTeX
Repository Staff Only: item control page