Search results | TU Delft Repositories

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What Makes Cow-Dung Stabilised Earthen Block Water-Resistant?

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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Revealing how maltodextrin-containing droplets dry using optical coherence tomography

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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On the fluidization of cohesive powders: Differences and similarities between micro- and nano-sized particle gas–solid fluidization

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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Systematic solvent screening and selection for polyhydroxyalkanoates (PHBV) recovery from biomass

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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Static and dynamic stickiness tests to measure particle stickiness

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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Real-time in-situ rheological assessment of sticky point temperature and humidity of powdered products

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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Editor’s preface

Meesters, G.M.H. (author)

contribution to periodical 2019

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Tuning roughness and gloss of powder coating paint by encapsulating the coating particles with thin Al₂O₃ films

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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Deposition Mechanism of Aluminum Oxide on Quantum Dot Films at Atmospheric Pressure and Room Temperature

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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Enhancing the activation of silicon carbide tracer particles for PEPT applications using gas-phase deposition of alumina at room temperature and atmospheric pressure

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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Controlled release from protein particles encapsulated by molecular layer deposition

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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Geopolymer Coating of Bacteria-containing Granules for Use in Self-healing Concrete

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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Gas-Phase Deposition of Ultrathin Aluminium Oxide Films on Nanoparticles at Ambient Conditions

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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Thermo-physical characterization of Pharmacoatr 603, Pharmacoatr 615 and Mowiolr 4-98

Perfetti, G. (author), Alphazan, T. (author), Wildeboer, W.J. (author), Meesters, G.M.H. (author)

journal article 2012

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Breakage of sodium benzoate granules under repeated impact conditions

Pitchumani, R. (author), Arce Strien, S. (author), Meesters, G.M.H. (author), Schaafsma, S.H. (author), Scarlett, B. (author)

journal article 2004

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Breakage behaviour of enzyme granules in a repeated impact test

Pitchumani, R. (author), Meesters, G.M.H. (author), Scarlett, B. (author)