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Mechanical properties and water absorption of surface modified ABS 3D printed by fused deposition modelling

Marco Leite (IDMEC, DEM-ACPMME, Universidade de Lisboa Instituto Superior Tecnico, Lisboa, Portugal and DMOG, ISCTE-Instituto, Lisboa, Portugal)
André Varanda (IDMEC, DEM-ACPMME, Universidade de Lisboa Instituto Superior Tecnico, Lisboa, Portugal)
António Relógio Ribeiro (IDMEC, DEM-ACPMME, Universidade de Lisboa Instituto Superior Tecnico, Lisboa, Portugal)
Arlindo Silva (Department of Engineering Product Development, Singapore University of Technology and Design, Singapore)
Maria Fátima Vaz (IDMEC, DEM-ACPMME, Universidade de Lisboa Instituto Superior Tecnico, Lisboa, Portugal)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 2 January 2018

817

Abstract

Purpose

The purpose of this paper is to investigate the effect of a sealing protective treatment on the water absorption and mechanical properties of acrylonitrile butadiene styrene (ABS)-printed parts by fused deposition modelling. Protective products include aqueous acetone solutions with different concentrations, polyurethane wood sealer and aqueous acrylic-based varnish.

Design/methodology/approach

Open porosity was estimated by the absorption coefficient and the total amount of water retained, obtained from water absorption tests. Mechanical characterization was performed by compressive and tensile tests. Different specimens with different build directions and raster angles were used.

Findings

The treatments with acetone solutions were not effective in reducing the porosity of ABS parts, as the amount of acetone that reduces effectively the porosity will also affect the sample dimensional stability. The polyurethane treatment was found to reduce the absorption coefficient, but the maximum water content and the open porosity remain almost unchanged in comparison with the ones obtained for untreated specimens. The treatment with an acrylic-based varnish was found to preserve the dimensional stability of the specimens, to reduce the open porosity and to maintain the compression and tension properties of the specimens in different build directions and raster angles.

Originality/value

Surface modification for water tight applications of ABS 3D printing parts enables new designs where both sealing and the preservation of mechanical properties are important. As per the knowledge of the authors, the water absorption and the mechanical behaviour of ABS 3D printed parts, before and after treatment, were not previously investigated.

Keywords

Acknowledgements

This work was supported by FCT, through IDMEC, under LAETA, project IUD/EMS/50022/2013. Authors gratefully acknowledge the funding of Project POCI-01-0145-FEDER-016414, cofinanced by Programa Operacional Competitividade e Internacionalização and Programa Operacional Regional de Lisboa, through Fundo Europeu de Desenvolvimento Regional (FEDER) and by National Funds through FCT – Fundação para a Ciência e Tecnologia.

Citation

Leite, M., Varanda, A., Ribeiro, A.R., Silva, A. and Vaz, M.F. (2018), "Mechanical properties and water absorption of surface modified ABS 3D printed by fused deposition modelling", Rapid Prototyping Journal, Vol. 24 No. 1, pp. 195-203. https://doi.org/10.1108/RPJ-04-2016-0057

Publisher

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Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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