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Development of polycaprolactone/hydroxyapatite composite resin for 405 nm digital light projection 3D printing

Yuan-Min Lin (Department of Dentistry, National Yang-Ming University, Taipei, Taiwan)
Hsuan Chen (Department of Dentistry, National Yang-Ming University, Taipei, Taiwan)
Chih-Hsin Lin (Department of Dentistry, National Yang-Ming University, Taipei, Taiwan)
Pin-Ju Huang (Department of Dentistry, National Yang-Ming University, Taipei, Taiwan)
Shyh-Yuan Lee (Department of Dentistry, National Yang-Ming University, Taipei, Taiwan and Department of Stomatology, Taipei Veterans Hospital, Taipei, Taiwan)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 28 January 2020

Issue publication date: 19 May 2020

Abstract

Purpose

The purpose of this study is to develop resin composite materials composed of polycaprolactone (PCL) acrylates and hydroxyapatite (HA) nanoparticles for ultraviolet digital light projection (DLP) three-dimensional (3D) printing technique.

Design/methodology/approach

Two PCL-based triacrylates, namely, glycerol-3 caprolactone-triacrylate (Gly-3CL-TA) and glycerol-6 caprolactone-triacrylate (Gly-6CL-TA) were synthesized from ring-opening polymerization of ε-caprolacton monomer in the presence of glycerol and then acrylation was performed using acryloyl chloride. 3D printing resins made of Gly-3CL-TA or Gly-6CL-TA, 5% HA and 3% of photoinitiator 2,4,6-Trimethylbenzoyl-diphenyl-phosphineoxide were then formulated. The surface topography, surface element composition, flexural strength, flexural modulus, cytotoxicity and degradation of the PCL-based scaffolds were then characterized.

Findings

Resin composite composed of Gly-3CL-TA or Gly-6CL-TA and 5% (w/w) of HA can be printed by 405 nm DLP 3D printers. The former has lower viscosity and thus can form a more uniform layer-by-layer structure, while the latter exhibited a higher flexural strength and modulus after being printed. Both composite materials are non-cytotoxic and degradable.

Originality/value

This study provides a direction of the formulation of environment-friendly resin composite for DLP 3D printing. Both resin composites have huge potential in tissue engineering applications.

Keywords

Acknowledgements

This research is funded by the Ministry of Science and Technology, Taiwan. The funding number is MOST-107-2218-E-010 −005.

Citation

Lin, Y.-M., Chen, H., Lin, C.-H., Huang, P.-J. and Lee, S.-Y. (2020), "Development of polycaprolactone/hydroxyapatite composite resin for 405 nm digital light projection 3D printing", Rapid Prototyping Journal, Vol. 26 No. 5, pp. 951-958. https://doi.org/10.1108/RPJ-06-2019-0166

Publisher

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Emerald Publishing Limited

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