Effect of Amino-Silane Mineral Waste Treatment on the Mechanical Resistance of PA12-Mineral Composites Processed by SLS Printing †
by
Daniel Barros
1,2,*, 
Luís Nobre
1,2,
João Bessa
1,2,
Fernando Cunha
1,2,
Michael Machado
3,
João P. Mendonça
3,
Paulo Machado
4,
César Fernandes
4 and
Raúl Fangueiro
1,2,3
1
Fibrenamics, Institute of Innovation on Fiber-Based Materials and Composites, University of Minho, 4800-058 Guimaraes, Portugal
2
Centre for Textile Science and Technology (2C2T), University of Minho, 4800-058 Guimaraes, Portugal
3
Department of Mechanical Engineering, University of Minho, 4800-058 Guimaraes, Portugal
4
D2 Technology, 4730-325 Braga, Portugal
*
Author to whom correspondence should be addressed.
†
Presented at the Materiais 2022, Marinha Grande, Portugal, 10–13 April 2022.
Mater. Proc. 2022, 8(1), 148; https://doi.org/10.3390/materproc2022008148
Published: 5 August 2022
(This article belongs to the Proceedings of MATERIAIS 2022)
Mineral exploration leads to a large amount of waste generation, which is landfilled, causing environmental impact problems [1]. For this reason, there is a need to find solutions for the reuse of this mineral waste. One possible solution that has been explored is to use it as a filler material in composites. Therefore, the main goal of this study was to develop ecocomposites based on this type of mineral waste that could be produced by SLS 3D printing [2]. This work undertook to study the influence of different amounts of slate and the application of a chemical treatment based on silane on the mechanical performance of polymer-mineral composites (PA12-slate).
Samples of PA12 (reference), PA12 with 30 wt% and 50 wt% of slate waste, and slate waste that had been previously surface-treated with silane (to improve the mechanical properties), were prepared in a SLS printer and characterized through tensile and flexure tests.
The feasibility of printing PA12-slate composites using SLS 3D, incorporating up to 50 wt% of mineral waste, was verified. However, a 92.1% decrease in the tensile strength was observed when the 50 wt% slate was added. In the sample with the same amount of mineral but previously treated with silane, an increase of 61.6% in the tensile strength was achieved in comparison to the PA12 with 50 wt% of slate.
The feasibility of producing a PA12-slate sample with up to 50 wt% of mineral waste using the SLS printing technique was demonstrated, adding value to this mineral waste. The mechanical properties increased with the application of the silane treatment.
Author Contributions
Conceptualization, D.B. and M.M.; methodology, L.N. and J.B.; software, C.F.; validation, F.C., R.F., J.P.M. and P.M.; formal analysis, J.B.; investigation, D.B.; resources, R.F., J.P.M. and P.M.; data curation, D.B.; writing—original draft preparation, D.B.; writing—review and editing, L.N. and J.B.; visualization, J.B.; supervision, J.B.; project administration, R.F., J.P.M. and P.M.; funding acquisition, R.F. and P.M. All authors have read and agreed to the published version of the manuscript.
Funding
The authors would like to express appreciation for the funding provided by the Operational Program of Portugal 2020, under the project nº 45266, entitled as “Next-gen 3D Printer”.
Institutional Review Board Statement
Not applicable.
Informed Consent Statement
Not applicable.
Data Availability Statement
Not applicable.
Conflicts of Interest
The authors declare no conflict of interest.
References
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MDPI and ACS Style
Barros, D.; Nobre, L.; Bessa, J.; Cunha, F.; Machado, M.; Mendonça, J.P.; Machado, P.; Fernandes, C.; Fangueiro, R. Effect of Amino-Silane Mineral Waste Treatment on the Mechanical Resistance of PA12-Mineral Composites Processed by SLS Printing. Mater. Proc. 2022, 8, 148. https://doi.org/10.3390/materproc2022008148
AMA Style
Barros D, Nobre L, Bessa J, Cunha F, Machado M, Mendonça JP, Machado P, Fernandes C, Fangueiro R. Effect of Amino-Silane Mineral Waste Treatment on the Mechanical Resistance of PA12-Mineral Composites Processed by SLS Printing. Materials Proceedings. 2022; 8(1):148. https://doi.org/10.3390/materproc2022008148
Chicago/Turabian StyleBarros, Daniel, Luís Nobre, João Bessa, Fernando Cunha, Michael Machado, João P. Mendonça, Paulo Machado, César Fernandes, and Raúl Fangueiro. 2022. "Effect of Amino-Silane Mineral Waste Treatment on the Mechanical Resistance of PA12-Mineral Composites Processed by SLS Printing" Materials Proceedings 8, no. 1: 148. https://doi.org/10.3390/materproc2022008148
