UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Effects of raster angle and material components on mechanical properties of polyether-ether-ketone/calcium silicate scaffolds

Zheng, J; Dong, E; Kang, J; Sun, C; Liu, C; Li, D; Wang, L; (2021) Effects of raster angle and material components on mechanical properties of polyether-ether-ketone/calcium silicate scaffolds. Polymers , 13 (15) , Article 2547. 10.3390/polym13152547. Green open access

[thumbnail of polymers-13-02547.pdf]
Preview
Text
polymers-13-02547.pdf - Published Version

Download (4MB) | Preview

Abstract

Polyetheretherketone (PEEK) was widely used in the fabrication of bone substitutes for its excellent chemical resistance, thermal stability and mechanical properties that were similar to those of natural bone tissue. However, the biological inertness restricted the osseointegration with surrounding bone tissue. In this study, calcium silicate (CS) was introduced to improve the bioactivity of PEEK. The PEEK/CS composites scaffolds with CS contents in gradient were fabricated with different raster angles via fused filament fabrication (FFF). With the CS content ranging from 0 to 40% wt, the crystallinity degree (from 16% to 30%) and surface roughness (from 0.13 ± 0.04 to 0.48 ± 0.062 µm) of PEEK/CS scaffolds was enhanced. Mechanical testing showed that the compressive modulus of the PEEK/CS scaffolds could be tuned in the range of 23.3–541.5 MPa. Under the same printing raster angle, the compressive strength reached the maximum with CS content of 20% wt. The deformation process and failure modes could be adjusted by changing the raster angle. Furthermore, the mapping relationships among the modulus, strength, raster angle and CS content were derived, providing guidance for the selection of printing parameters and the control of mechanical properties.

Type: Article
Title: Effects of raster angle and material components on mechanical properties of polyether-ether-ketone/calcium silicate scaffolds
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/polym13152547
Publisher version: https://doi.org/10.3390/polym13152547
Language: English
Additional information: © 2021 MDPI. This is an open access article distributed under the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/).
Keywords: polyetheretherketone (PEEK); calcium silicate (CS); fused filament fabrication (FFF); mechanical properties; raster angle
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: https://discovery.ucl.ac.uk/id/eprint/10132683
Downloads since deposit
25Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item