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Kamphorst, R. (author), Wanjari, Pratyush (author), Saedy, S. (author), van Dam, Julia F.K. (author), Thijssen, A. (author), Brüner, Philipp (author), Grehl, Thomas (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)In this study, we investigated the wettability and agglomeration characteristics of polymer microspheres coated with low-temperature deposited SiO<sub>2</sub> in a fluidized bed atomic layer deposition (ALD) setup. Surface characterization revealed the presence of a significant amount of deposited Si-OH groups within the first cycles. A...journal article 2024
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Kamphorst, R. (author), van der Sande, P.C. (author), Wu, K. (author), Wagner, E.C. (author), David, M.K. (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)Vibro-assisted fluidization of cohesive micro-silica has been studied by means of X-ray imaging, pressure drop measurements, and off-line determination of the agglomerate size. Pressure drop and bed height development could be explained by observable phenomena taking place in the bed; slugging, channeling, fluidization or densification. It...journal article 2024
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van der Sande, P.C. (author), Wagner, E.C. (author), de Mooij, Jack (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)Horizontal stirred bed reactors are widely used in the commercial manufacturing of polypropylene. However, a comprehensive understanding of the particle dynamics in horizontal stirred bed reactors remains elusive, primarily due to the lack of detailed experimental data. In this work, we studied the influence of operating parameters on the...journal article 2024
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Kamphorst, R. (author), Wu, K. (author), van Baarlen, M. (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)In this study, the impact of different vibrational modes on the fluidization characteristics of cohesive micro- and nano-silica powder was examined. Fractional pressure drop, bed expansion measurements, and X-ray imaging were utilized to characterize the fluidization quality. The densities of the emulsion phase at the top and bottom of the...journal article 2024
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Wu, K. (author), Kamphorst, R. (author), Bakker, A.M.T. (author), Ford, Jasper (author), Wagner, E.C. (author), Ochkin-Koenig, Olga (author), Franck, Miika (author), Weis, Dominik (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)Stirring has been recognized in the literature as a promising technique for facilitating fluidization of cohesive powders, via inputting additional energy to counteract interparticle forces. However, the influence of operating conditions and stirrer configurations on flow behavior remains largely unknown, which impedes the practical...journal article 2024
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Wu, K. (author), Wagner, E.C. (author), Ochkin-Koenig, Olga (author), Franck, Miika (author), Weis, Dominik (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)Mechanical vibration has been broadly used to assist fluidization of cohesive powders, because of its capability to disrupt gas channels and agglomerates. However, the improvement reported in literature is mostly deduced from bulk response and ex-situ measurements, whereas the induced fluidization behavior and underlying physics remain...journal article 2023
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Meesters, G.M.H. (author), van Loosdrecht, Mark C.M. (author), Mota, Nelson (author), Jonkers, H.M. (author)The water-resistance of cow-dung has made it a widely used stabiliser in traditional earthen structures in several Asian and African countries. Multiple studies have shown an improvement in water-resistance with the addition of cow-dung, but none provides insight into this behaviour. The present study investigates the water-resistance behaviour...journal article 2022
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Kamphorst, R. (author), Wu, K. (author), Salameh, S. (author), Meesters, G.M.H. (author), van Ommen, J.R. (author)The fluidization of cohesive powders has been extensively researched over the years. When looking at literature on the fluidization of cohesive particles, one will often find papers concerned with only micro- or only nano-sized powders. It is, however, unclear whether they should be treated differently at all. In this paper, we look at...journal article 2022
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Sewalt, E.J.G. (author), Kalkman, J. (author), van Ommen, J.R. (author), Meesters, G.M.H. (author), van Steijn, V. (author)Properties of powders produced from drying solute-containing droplets arise from the dynamic redistribution of solute during drying. While insights on the dynamic redistribution are instrumental for the rational design of powders and for the optimized operation of equipment such as spray dryers, experimental techniques that allow measuring...journal article 2022
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Vermeer, C.M. (author), Nielsen, Maaike (author), Eckhardt, Vincent (author), Hortensius, Matthijs (author), Tamis, J. (author), Picken, S.J. (author), Meesters, G.M.H. (author), Kleerebezem, R. (author)The biotechnological production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) derived from organic waste streams by mixed microbial communities is well established at the pilot-level. However, there is limited research on the recovery of the biopolymer from the microbial biomass, while its impact on product quality and product costs...journal article 2022
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Sewalt, E.J.G. (author), Zhang, F. (author), van Steijn, V. (author), van Ommen, J.R. (author), Meesters, G.M.H. (author)Sticking of particles has a tremendous impact on powder-processing industries, especially for hygroscopic amorphous powders. A wide variety of experimental methods has been developed to measure at what combinations of temperature and moisture content material becomes sticky. This review describes, for each method, how so-called stickiness...journal article 2021
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Groen, Johan C. (author), Kooijman, Wim (author), van Belzen, Djamilla (author), Meesters, G.M.H. (author), Schütz, Denis (author), Aschl, Timothy (author), Verolme, Patrick (author)Unwanted changes in powder flow behavior can unexpectedly occur when a product is exposed to certain conditions of temperature and humidity. This can happen during production, but also during transport or storage. The work reported here demonstrates the novel approach of using an amended powder rheology set-up for measuring and predicting...journal article 2020
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- Meesters, G.M.H. (author) contribution to periodical 2019
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Valdesueiro, David (author), Hettinga, Hans (author), Drijfhout, Jan Pieter (author), Lips, Priscilla (author), Meesters, G.M.H. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)In this work, we report a method to change the surface finish of a standard polyester-based powder coating paint, from gloss to matt, by depositing ultrathin films of Al<sub>2</sub>O<sub>3</sub> on the powder coating particles. The coating experiments were performed in a fluidized bed reactor at 1 bar and 27 °C, using a gas-phase coating...journal article 2017
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Valdesueiro Gonzalez, D. (author), Prabhu, M.K. (author), Guerra Nunez, C.R. (author), Sandeep, C. S Suchand (author), Kinge, S.S. (author), Siebbeles, L.D.A. (author), de Smet, L.C.P.M. (author), Meesters, G.M.H. (author), Kreutzer, M.T. (author), Houtepen, A.J. (author), van Ommen, J.R. (author)Stability of quantum dot (QD) films is an issue of concern for applications in devices such as solar cells, LEDs, and transistors. This paper analyzes and optimizes the passivation of such QD films using gas-phase deposition, resulting in enhanced stability. Crucially, we deposited alumina at economically attractive conditions, room...journal article 2016
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- Valdesueiro Gonzalez, D. (author), Garcia-Trinanes, P (author), Meesters, G.M.H. (author), Kreutzer, M.T. (author), Gargiuli, J (author), Leadbetter, TW (author), Parker, DJ (author), Seville, JPK (author), van Ommen, J.R. (author) journal article 2016
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Vasudevan, S.A. (author), Xu, Y. (author), Karwal, S. (author), Van Ostaay, H.G.M.E. (author), Meesters, G.M.H. (author), Talebi, M. (author), Sudhölter, E.J.R. (author), Van Ommen, J.R. (author)Molecular layer deposition (MLD) was used to coat micron-sized protein particles in a fluidized bed reactor. Our results show that the dissolution rate of particles coated via MLD rapidly decreases with the increase in number of coating cycles, while the uncoated particles dissolve instantaneously.journal article 2015
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De Koster, S.A.L. (author), Mors, R.M. (author), Nugteren, H.W. (author), Jonkers, H.M. (author), Meesters, G.M.H. (author), Van Ommen, J.R. (author)Concrete structures are often reinforced with steel. In order for the reinforcement to take over tensile forces, concrete has to crack. Through such cracks, water and compounds that are harmful to concrete can enter. This can cause durability issues like leakage, concrete degradation and reinforcement corrosion. In situ repair of cracks is often...journal article 2015
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Valdesueiro Gonzalez, D. (author), Meesters, G.M.H. (author), Kreutzer, M.T. (author), Van Ommen, J.R. (author)We have deposited aluminium oxide films by atomic layer deposition on titanium oxide nanoparticles in a fluidized bed reactor at 27 ± 3 °C and atmospheric pressure. Working at room temperature allows coating heat-sensitive materials, while working at atmospheric pressure would simplify the scale-up of this process. We performed 4, 7 and 15...journal article 2015
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- Perfetti, G. (author), Alphazan, T. (author), Wildeboer, W.J. (author), Meesters, G.M.H. (author) journal article 2012
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