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Process-driven microstructure control in melt-extrusion-based 3D printing for tailorable mechanical properties in a polycaprolactone filament
Authors:
Fengyuan
Liu
(University of Manchester)
,
Cian
Vyas
(University of Manchester)
,
Gowsihan
Poologasundarampillai
(University of Birmingham)
,
Ian
Pape
(Diamond Light Source)
,
Srichand
Hinduja
(University of Manchester)
,
Wajira
Mirihanage
(University of Manchester)
,
Paulo
Bartolo
(University of Manchester)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Macromolecular Materials And Engineering
, VOL 34
State:
Published (Approved)
Published:
May 2018
Diamond Proposal Number(s):
14877
Abstract: 3D printing techniques are utilized to produce biomaterial scaffolds with porous architectures that enable cell attachment, biological factors, and appropriate mechanical strength. As the basic building block of a scaffold, the individual filaments should have sufficient mechanical properties, comprising high compressive loading, and fracture resistance to mimic the natural tissue organisation. In this contribution, process–structure–property relationships in melt extruded polycaprolactone filaments are investigated by considering crystalline features, tensile properties, and an array of processing parameters. The tensile properties of the filaments are improved significantly with relatively higher screw rotational speed and relatively lower processing temperature resulting in considerable increase in Young's modulus. The favorable properties are attributed to the increased crystal volume fraction and anisotropy. Thus, this study provides initial pathways for the potential control of mechanical properties of bioscaffolds via engineering crystalline structural features in printed filaments.
Journal Keywords: additive manufacturing; crystallization; screw‐assisted melt extrusion; synchrotron mechanical properties; X‐ray diffraction
Diamond Keywords: Additive Manufacturing
Subject Areas:
Biology and Bio-materials
Instruments:
B16-Test Beamline
Added On:
05/06/2018 08:35
Discipline Tags:
Biomaterials
Materials Science
Life Sciences & Biotech
Technical Tags:
Diffraction