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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Major, Ian
Irish Research Council
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2024Material compatibility and processing challenges in droplet deposition modelling additive manufacturingcitations
- 2024Material compatibility and processing challenges in droplet deposition modelling additive manufacturing: A study on pharmaceutical excipients Polyvinylpyrrolidone/vinyl acetate (PVP/VA) and Polycaprolactone (PCL)citations
- 2023Modification of hyaluronic acid to enable click chemistry photo-crosslinking of hydrogels with tailorable degradation profilescitations
- 2023Designing Sustainable Polymer Blendscitations
- 2023Designing sustainable polymer blends: tailoring mechanical properties and degradation behaviour in PHB/PLA/PCL blends in a seawater environmentcitations
- 2023Sustainable polyurethane coatings based on functional Camelina oil-based polyolscitations
- 2023Synergy Assessment of Four Antimicrobial Bioactive Compounds for the Combinational Treatment of Bacterial Pathogenscitations
- 2021Influence of extrusion screw speed on the properties of halloysite nanotube impregnated polylactic acid nanocompositescitations
- 2021Influence of extrusion screw speed on the properties of halloysite nanotube impregnated polylactic acid nanocompositescitations
- 2021On the possibility of replacement of calcium carbonate by a high-performance, economically viable filler in polyethylene composites
- 2021Development of a low-temperature extrusion process for production of GRAS bioactive-polymer loaded compounds for targeting antimicrobial-resistant (AMR) bacteriacitations
- 2020Effect of stereolithography 3d printing on the properties of pegdma hydrogelscitations
- 2020Fused filament fabrication of peekcitations
- 2020Effect of stereolithography 3D printing on the properties of PEGDMA hydrogels.citations
- 2019Comparison of fused-filament fabrication to direct compression and injection molding in the manufacture of oral tabletscitations
- 2019Influence of annealing and biaxial expansion on the properties of Poly-l-lactic) medical tubing.citations
- 2019Additive manufacturing of PLA/HNT nanocomposites for biomedical applicationscitations
- 2019Influence of Annealing and Biaxial Expansion on the Properties of Poly(l-Lactic Acid) Medical Tubingcitations
- 2019Influence of annealing and biaxial expansion on the properties of poly(l-lactic acid) medical tubingcitations
- 2019Faster release of lumen-loaded drugs than matrix-loaded equivalent in polylactic acid/halloysite nanotubescitations
- 2018Material considerations for fused-filament fabrication of solid dosage forms.citations
- 2018Material considerations for fused-filament fabrication of solid dosage formscitations
- 2016Synthesis and characterization of high density polyethylene/peat ash compositescitations
- 2016Chemical surface modification of calcium carbonate particles with stearic acid using different treating methodscitations
- 2016Characteristics of the treated calcium carbonate particles with stearic acid using different treating methods. ; Chemical surface modification of calcium carbonate particles with stearic acid using different treating methods
- 2015Thermal Degradation of Bio-nanocompositescitations
- 2015Hot melt extruded and injection moulded dosage formscitations
- 2013A modified SILCS contraceptive diaphragm for long-term controlled release of the HIV microbicide dapivirinecitations
- 2012Development of polylactide and polyethylene vinyl acetate blends for the manufacture of vaginal rings.citations
- 2012Development of polylactide and polyethylene vinyl acetate blends for the manufacture of vaginal ringscitations
- 2006Structure and performance of ABS-clay nanocomposites by melt compounding
- 2006Structure-property and pigment/organoclay interaction in PP nanocomposites
- 2006Structure and performance of novel acrylonitrile-styrene-acrylate nanocomposite
- 2005Polymorphism and crystallisation in metallocene PP-copolymer nanocomposites
- 2005Optimise organoclay exfoliation in polymer nanocomposites by customising the extrusion temperature gradient
- 2005Structure-property of pigmented polypropylene nanocomposites incorporating organo-layered silicates
- 2004Effect of phthalocyanine blue pigment on mechanical and thermal properties of polypropylene copolymerscitations
- 2004Comparison of the effect of pigments on the mechanical and thermal properties on two different catalysed propylene-ethylene random copolymers
- 2003The mechanical properties and crystallization behaviour of pigmented propylene-ethylene random copolymer
- 2003The effect of phthalocyanine pigment on the microstructural and mechanical performance of propylene-ethylene block copolymer
- 2003The structure am performance of injection moulded, pigmented polypropylene copolymers
Places of action
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article
Material compatibility and processing challenges in droplet deposition modelling additive manufacturing
Abstract
<p>Additive manufacturing (AM) enables the production of complex, lightweight, and customized components with superior quality. Selecting the right materials considering their thermal properties, printability, and layer adhesion is crucial in melting-based AM techniques. This study investigates Droplet Deposition Modelling (DDM), an innovative material extrusion process that utilizes thermoplastic granules. DDM is distinguished by its shorter manufacturing times and a wider range of materials, setting it apart from traditional material extrusion methods such as fused filament fabrication. We investigated the printability and part quality in DDM using two common pharmaceutical excipients: Polyvinylpyrrolidone/vinyl acetate 6:4 (PVP/VA), which is highly brittle, and Polycaprolactone (PCL), known for its low solubility and role in controlled drug release. Different ratios of PVP/VA and PCL were compounded via hot melt extrusion (HME) and used in DDM to study the impact of ingredient content on printability and part quality, employing geometrical models to assess material compatibility and printability. The study revealed that increasing PVP/VA content leads to higher viscosity, reduced flowability, and uneven deposition, with formulations of 80 % and 100 % PVP/VA showing poor processability. In contrast, formulations with 60 % and 40 % PVP/VA exhibited smooth processing and compatibility with DDM. We identified processing temperature and Drop Aspect Ratio (DAR) as key factors influencing material printability and part quality. Elevated processing temperatures and reduced DAR were found to increase interface temperatures, reduce diffusion, and potentially cause the 'elephant feet' issue. Additionally, smaller droplet sizes and material characteristics, such as higher interfacial tension in PCL, could lead to coalescence. Our findings highlight the complexities in optimizing DDM processing parameters and material blends, underscoring the need for careful formulation design to achieve high-quality 3D printed products.</p>