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Classification of (micro)plastics using cathodoluminescence and machine learning

Shahmohammadi, M.S. (author), Parker, L.A. (author), Henke, S. (author), Urbanus, J.H. (author)

Microplastics are a growing environmental and toxicological concern, having been found in the remotest locations of the earth and within multiple organs of the human body. However, the scale of the problem is not yet fully known as the smallest micro- and nanoplastics (MNPs) cannot accurately be measured due to limitations in measurement and...

article 2022

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Biochar application modifies soil properties of a former mine technosol: SEM/EDS study to investigate Pb and As speciation

Lebrun, M. (author), Nandillon, R. (author), Miard, F. (author), Bourgerie, S. (author), Visser, R. (author), Morabito, D. (author)

article 2021

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Comparison of propellant processing by cast-cure and resonant acoustic mixing

Zebregs, M. (author), Mayer, A.E.H.J. (author), van der Heijden, A.E.D.M. (author)

In this comparative study, a solid composite, AN/HTPB-based propellant was prepared by conventional processing in a mechanical mixer and by applying an advanced processing technique relying on resonant acoustic mixing (RAM). After curing of the propellants, cross-sections were prepared and characterized by scanning electron microscopy. Also the...

article 2020

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A new approach combining analytical methods for workplace exposure assessment of inhalable multi-walled carbon nanotubes

Tromp, P.C. (author), Kuijpers, E. (author), Bekker, C. (author), Godderis, L. (author), Lan, Q. (author), Jedynska, A.D. (author), Vermeulen, R. (author), Pronk, A. (author)

To date there is no consensus about the most appropriate analytical method for measuring carbon nanotubes (CNTs), hampering the assessment and limiting the comparison of data. The goal of this study is to develop an approach for the assessment of the level and nature of inhalable multi-wall CNTs (MWCNTs) in an actual workplace setting by...

article 2017

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In-situ tensile testing of propellants in SEM: Influence of temperature

di Benedetto, G.L. (author), van Ramshorst, M.C.J. (author), Duvalois, W. (author), Hooijmeijer, P.A. (author), van der Heijden, A.E.D.M. (author)

A tensile module system placed within a Scanning Electron Microscope (SEM) was utilized to conduct insitu tensile testing of propellant samples. The tensile module system allows for real-time in-situ SEM analysis of the samples to determine the failure mechanism of the propellant material under tensile force. The focus of this study was to vary...

article 2017

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Energetic materials research using scanning electron microscopy

van den Elshout, J.J.M.H. (author), Duvalois, W. (author), Di Benedetto, G.L. (author), Bouma, R.H.B. (author), van der Heijden, A.E.D.M. (author)

A key-technique for the research of energetic materials is scanning electron microscopy. In this paper several examples are given of characterization studies on energetic materials, including a solid composite propellant formulation. Results of the characterization of energetic materials using scanning electron microscopy comprise the...

conference paper 2016

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The indoor fungus Cladosporium halotolerans survives humidity dynamics markedly better than Aspergillus niger and Penicillium rubens despite less growth at lowered steady-state water activity

Segers, F.J.J. (author), van Laarhoven, K.A. (author), Huinink, H.P. (author), Adan, O.C.G. (author), Wösten, H.A.B. (author), Dijksterhuis, J. (author)

Indoor fungi cause damage in houses and are a potential threat to human health. Indoor fungal growth requires water, for which the terms water activity (aw) and relative humidity (RH) are used. The ability of the fungi Aspergillus niger, Cladosporium halotolerans, and Penicillium rubens at different developmental stages to survive changes in aw...

article 2016

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Potential Release of Manufactured Nano Objects during Sanding of Nano-Coated Wood Surfaces

Fransman, W. (author), Bekker, C. (author), Tromp, P. (author), Duis, W.B. (author)

Increasing production and applications of manufactured nano objects (MNOs) have become a source for human exposure and therefore raise concerns and questions about the possible health effects. In this study, the potential release of nano objects, their agglomerates, and aggregates (NOAA) as a result of sanding of hardwood treated with MNOs...

article 2016

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Compressive response of multiple-particles-polymer systems at various strain rates

Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)

Multiple-particles-polymer systems of a polyurethane elastomeric matrix embedding 25wt.% and 50wt.% 0.5 mm-diameter PMMA particles were investigated using a split Hopkinson pressure bar (SHPB) setup for revealing the dynamic compressive mechanical response. Taking the 25wt.%-particles-polymer system as a reference case, the characteristics of...

article 2016

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Microstructures of Early Jurassic (Toarcian) shales of Northern Europe

Houben, M.E. (author), Barnhoorn, A. (author), Wasch, L. (author), Trabucho-Alexandre, J. (author), Peach, C.J. (author), Drury, M.R. (author)

The Toarcian (Early Jurassic) Posidonia Shale Formation is a possible unconventional gas source in Northern Europe and occurs within the Cleveland Basin (United Kingdom), the Anglo-Paris Basin (France), the Lower Saxony Basin and the Southwest Germany Basin (Germany), and the Roer Valley Graben, the West Netherlands Basin, Broad Fourteens Basin,...

article 2016

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In-situ tensile testing of propellant samples within SEM

di Benedetto, G.L. (author), van Ramshorst, M.C.J. (author), Duvalois, W. (author), Hooijmeijer, P.A. (author), van der Heijden, A.E.D.M. (author), de Klerk, W.P.C. (author)

A tensile module system placed within a FEI NovaNanoSEM 650 Scanning Electron Microscope (SEM) was utilized in this work to conduct in-situ tensile testing of propellant material samples. This tensile module system allows for real-time in-situ SEM analysis of the samples to determine the failure mechanism of the propellant material under tensile...

conference paper 2015

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Release of cerium dibutylphosphate corrosion inhibitors from highly filled epoxy coating systems

van Soestbergen, M. (author), Baukh, V. (author), Erich, S.J.F. (author), Huinink, H.P. (author), Adan, O.C.G. (author)

Carcinogenic chromates are phased out as corrosion inhibitors in organic coatings, and are replaced by benign alternatives. Cerium-based compounds are excellent corrosion inhibitors in an aqueous environment. However, whether they are effective as corrosion inhibitor in an organic coating also depends on their interaction with the coating matrix...

article 2014

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Effect of reactive surface area of minerals on mineralization and carbon dioxide trapping in a depleted gas reservoir

Bolourinejad, P. (author), Shoeibi Omrani, P. (author), Herber, R. (author)

In this study, a long-term (up to 1000 years) geochemical modelling of subsurface CO2 storage was carried out on sandstone reservoirs of depleted gas fields in northeast Netherlands. It was found that mineral dissolution/precipitation has only a minor effect on reservoir porosity. In order to validate this, we focused specifically on the...

article 2014

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Kinetics of laser-assisted carbon nanotube growth

van de Burgt, Y. (author), Bellouard, Y. (author), Mandamparambil, R. (author)

Laser-assisted chemical vapour deposition (CVD) growth is an attractive mask-less process for growing locally aligned carbon nanotubes (CNTs) in selected places on temperature sensitive substrates. The nature of the localized process results in fast carbon nanotube growth with high experimental throughput. Here, we report on the detailed...

article 2014

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Ballistic performance and microstructure of four armor ceramics

Abadjieva, E. (author), Carton, E.P. (author)

The ballistic behavior of four different armor ceramic materials with thicknesses varying from 3 mm to 14 mm has been investigated. These are two types of alumina Al2O3 armor grades and two types of SiC armor grades produced by different armor ceramic producers. The ballistic study has been performed using the standard DoP technique with two...

conference paper 2013

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Micro and nanopatterning of functional materials on flexible plastic substrates via site-selective surface modification using oxygen plasma

George, A. (author), Stawski, T.M. (author), Unnikrishnan, S. (author), Veldhuis, S.A. (author), ten Elshof, J.E. (author)

A simple and cost effective methodology for large area micro and nanopatterning of a wide range of functional materials on flexible substrates is presented. A hydrophobic-hydrophilic chemical contrast was patterned on surfaces of various flexible plastic substrates using molds and shadow masks with which selected areas of the substrate surface...

article 2012

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Enzymatic degradation of granular potato starch by Microbacterium aurum strain B8.A

Sarian, F.D. (author), van der Kaaij, R.M. (author), Kralj, S. (author), Wijbenga, D.-J. (author), Binnema, D.J. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author)

Microbacterium aurum strain B8.A was isolated from the sludge of a potato starch-processing factory on the basis of its ability to use granular starch as carbon- and energy source. Extracellular enzymes hydrolyzing granular starch were detected in the growth medium of M. aurum B8.A, while the type strain M. aurum DSMZ 8600 produced very little...

article 2012

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On the surface topography of ultrashort laser pulse treated steel surfaces

Vincenc Obona, J. (author), Ocelík, V. (author), Skolski, J.Z.P. (author), Mitko, V.S. (author), Römer, G.R.B.E. (author), Huis In't Veld, A.J. (author), de Hosson, J.T.M. (author)

This paper concentrates on observations of the surface topography by scanning electron microscopy (SEM) on alloyed and stainless steels samples treated by ultrashort laser pulses with duration of 210 fs and 6.7 ps. Globular-like and jet-like objects were found depending on the various levels of the fluence applied. It is shown that these...

article 2011

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Adlayers of palladium particles and their aggregates on porous polypropylene hollow fiber membranes as hydrogenization contractors/reactors

Volkov, V.V. (author), Lebedeva, V.I. (author), Petrova, I.V. (author), Bobyl, A.V. (author), Konnikov, S.G. (author), Roldughin, V.I. (author), van Erkel, J. (author), Tereshchenko, G.F. (author)

Principal approaches for the preparation of catalytic membrane reactors based on polymer membranes containing palladium nanoparticles and for the description of their characteristics are presented. The method for the development of adlayers composed of palladium nanoparticles and their aggregates on the surface of hydrophobic polypropylene...

article 2011

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The effect of calcining temperature on the properties of 0-3 piezoelectric composites of PZT and a liquid crystalline thermosetting polymer

van den Ende, D.A. (author), Groen, W.A. (author), van der Zwaag, S. (author)

We report on the optimisation of a recently developed high performance 0-3 piezoelectric composite comprising of the piezoelectric Lead Zirconate Titanate (PZT) powder and a liquid crystalline thermosetting matrix polymer (LCT). The matrix polymer is a liquid crystalline polymer comprising of an HBA-HNA backbone with phenylethynyl end-groups....

article 2011