Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions
In this work an eco-friendly methodology to manufacture lithium disilicate complex parts using a water-based photocurable suspension is proposed. The particles surface was modified with polyethyleneimine to improve it rheological and chemical stability in water media. The surface functionalization o...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Open Ceramics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539525000094 |
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| author | Manuel F.R.P. Alves A. Ferrandez-Montero B. Ferrari Maria H.F.V. Fernandes Susana M. Olhero A.J. Sanchez-Herencia |
| author_facet | Manuel F.R.P. Alves A. Ferrandez-Montero B. Ferrari Maria H.F.V. Fernandes Susana M. Olhero A.J. Sanchez-Herencia |
| author_sort | Manuel F.R.P. Alves |
| collection | DOAJ |
| description | In this work an eco-friendly methodology to manufacture lithium disilicate complex parts using a water-based photocurable suspension is proposed. The particles surface was modified with polyethyleneimine to improve it rheological and chemical stability in water media. The surface functionalization of powders allows the formulation of high solid content slurries with relatively small (17–20 vol%) amounts of poly(ethylene glycol)diacrylate (PEGDA) as reactive monomer and Lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) as photoinitiator. The printing parameters for Vat-photopolymerization were determined based on photo-rheological measurements. Simple geometrical shapes were successfully printed with suspensions containing 42–45 vol% of solids for structural and mechanical characterization. Due to the aqueous-based media, a fast debinding cycle was employed (≈ 10 h), resulting in sintered samples with ≈ 98 % of relative density and a flexural strength of ≈280 MPa. The optimized photocurable suspension and printing parameters were then selected to print different kind of dental prostheses as a proof-of concept. |
| format | Article |
| id | doaj-art-b4c4ce97cf2942f59ee0bb6e0aac939a |
| institution | OA Journals |
| issn | 2666-5395 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj-art-b4c4ce97cf2942f59ee0bb6e0aac939a2025-08-20T02:07:20ZengElsevierOpen Ceramics2666-53952025-03-012110074210.1016/j.oceram.2025.100742Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensionsManuel F.R.P. Alves0A. Ferrandez-Montero1B. Ferrari2Maria H.F.V. Fernandes3Susana M. Olhero4A.J. Sanchez-Herencia5Department of Materials and Ceramics Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, Portugal; Corresponding authors.Instituto de Ceramica y Vidrio (ICV), CSIC, C/ Kelsen 5, 28049 Madrid, Spain; Corresponding authors.Instituto de Ceramica y Vidrio (ICV), CSIC, C/ Kelsen 5, 28049 Madrid, SpainDepartment of Materials and Ceramics Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, PortugalDepartment of Materials and Ceramics Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, PortugalInstituto de Ceramica y Vidrio (ICV), CSIC, C/ Kelsen 5, 28049 Madrid, SpainIn this work an eco-friendly methodology to manufacture lithium disilicate complex parts using a water-based photocurable suspension is proposed. The particles surface was modified with polyethyleneimine to improve it rheological and chemical stability in water media. The surface functionalization of powders allows the formulation of high solid content slurries with relatively small (17–20 vol%) amounts of poly(ethylene glycol)diacrylate (PEGDA) as reactive monomer and Lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) as photoinitiator. The printing parameters for Vat-photopolymerization were determined based on photo-rheological measurements. Simple geometrical shapes were successfully printed with suspensions containing 42–45 vol% of solids for structural and mechanical characterization. Due to the aqueous-based media, a fast debinding cycle was employed (≈ 10 h), resulting in sintered samples with ≈ 98 % of relative density and a flexural strength of ≈280 MPa. The optimized photocurable suspension and printing parameters were then selected to print different kind of dental prostheses as a proof-of concept.http://www.sciencedirect.com/science/article/pii/S2666539525000094Additive manufacturingColloidal processingVat-photopolymerizationPhoto-rheologyLithium disilicateDental materials |
| spellingShingle | Manuel F.R.P. Alves A. Ferrandez-Montero B. Ferrari Maria H.F.V. Fernandes Susana M. Olhero A.J. Sanchez-Herencia Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions Open Ceramics Additive manufacturing Colloidal processing Vat-photopolymerization Photo-rheology Lithium disilicate Dental materials |
| title | Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions |
| title_full | Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions |
| title_fullStr | Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions |
| title_full_unstemmed | Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions |
| title_short | Manufacturing of lithium disilicate glass-ceramics by Vat-photopolymerization of water-based photocurable suspensions |
| title_sort | manufacturing of lithium disilicate glass ceramics by vat photopolymerization of water based photocurable suspensions |
| topic | Additive manufacturing Colloidal processing Vat-photopolymerization Photo-rheology Lithium disilicate Dental materials |
| url | http://www.sciencedirect.com/science/article/pii/S2666539525000094 |
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