Process-Driven Microstructure Control in Melt-Extrusion- Based 3D Printing for Tailorable Mechanical Properties in a Polycaprolactone Filament

Research output: Contribution to journalArticle

  • External authors:
  • Srichand Hinduja
  • Cian Vyas
  • Gowsihan Poologasundarampilla
  • Ian Pape

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 rela- tively higher screw rotational speed and relatively lower processing tempera- ture resulting in considerable increase in Young’s modulus. The favorable properties are attributed to the increased crystal volume fraction and anisot- ropy. Thus, this study provides initial pathways for the potential control of mechanical properties of bioscaffolds via engineering crystalline structural features in printed filaments.

Bibliographical metadata

Original languageEnglish
Article number1800173
Number of pages6
JournalMacromolecular Materials and Engineering
Volume303
Issue number8
Early online date29 May 2018
DOIs
Publication statusPublished - 29 May 2018

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