A5071408394- Energetic Materials and Combustion
- Rocket and propulsion systems research
- Crystallization and Solubility Studies
- Thermal and Kinetic Analysis
- Electrohydrodynamics and Fluid Dynamics
- Mass Spectrometry Techniques and Applications
- High-Velocity Impact and Material Behavior
- nanoparticles nucleation surface interactions
- Plasma Applications and Diagnostics
- Spacecraft and Cryogenic Technologies
- Combustion and Detonation Processes
- Chemical Thermodynamics and Molecular Structure
- Fluid Dynamics and Heat Transfer
- Isotope Analysis in Ecology
- Boron and Carbon Nanomaterials Research
- Microfluidic and Capillary Electrophoresis Applications
- Calcium Carbonate Crystallization and Inhibition
- Analytical chemistry methods development
- Spectroscopy and Quantum Chemical Studies
- Crystallography and molecular interactions
- Solidification and crystal growth phenomena
- Advanced Chemical Sensor Technologies
- Kidney Stones and Urolithiasis Treatments
- Molecular Sensors and Ion Detection
- Microencapsulation and Drying Processes
Delft University of Technology
2016-2025
Netherlands Organisation for Applied Scientific Research
2012-2024
Ministry of Defence
2006-2023
Radboud University Nijmegen
1989-1994
In this paper, a selection of the results obtained on crystallization energetic materials RDX, HMX, and CL-20 will be briefly reported. Furthermore, shock sensitivity these explosives, when incorporated in so-called plastic bonded explosive (PBX), discussed more detail. One most important is direct correlation between mean density material PBX containing explosive. This implies that, similar to many other solid materials, ability control product quality also one major key factors playing...
After World War II, large amounts of ammunition were dumped in surface waters worldwide, potentially releasing harmful and toxic compounds to the environment. To study their degradation, items Eastern Scheldt The Netherlands surfaced. Severe damage due corrosion leak paths through casings observed, making explosives accessible sea water. Using novel techniques, concentrations ammunition-related surrounding seabed seawater analyzed at 15 different locations. In direct vicinity ammunition,...
Crystallization of calcium oxalate (CaOx) was studied in microfluidic devices, with geometries simulating kidney stones collecting ducts, under laminar flow conditions relevant for stone formation.
Abstract Nano‐ and submicron‐sized crystals are too small to contain inclusions are, therefore, expected have a higher internal quality compared conventionally sized particles (several tens hundreds of microns). Using electrospray crystallization, nano‐ can be easily produced. With the aid mist ultrafine solution droplets is generated subsequent solvent evaporation leads crystallization crystals. cyclotrimethylene trinitramine (RDX) solutions in acetone, conditions for stable continuous jet...
Abstract The failure mechanism of a propellant consisting hydroxyl terminated poly‐butadiene filled with ammonium perchlorate and aluminum (HTPB/AP/Al) was determined by performing in‐situ uniaxial tensile tests in scanning electron microscope (SEM). experimental test plan contained experiments performed at room temperature (25 °C) three different strain rates (30, 150 750 μm min −1 ). images videos collected the SEM were correlated stress‐strain diagrams created experiments, order to relate...
Many new pharmaceuticals have low water solubility, hampering their pharmaceutical activity upon administering. One approach to increase solution concentrations during drug administration is the surface-to-volume ratio by decreasing crystal product size. Sub-micrometer-sized niflumic acid crystals were produced electrospray crystallization. Electrospray crystallization uses a high potential difference create mist of ultrafine charged droplets. The subsequent total solvent evaporation and...
A method is described for determining the solubility of multicomponent crystalline compounds from clear points upon sample dilution at a constant temperature. Clear are established by continuously adding solvent mixture to suspension known composition until solution appears. For validation, this addition compared traditional equilibrium concentration temperature and more recent variation with which point temperatures determined increasing Solubility data binary systems (1 solute, 1 solvent)...
In the literature, two different frameworks exist for describing rheology of solid/liquid suspensions: (1) “viscous” framework in terms relative suspension viscosity, ηr, as a function reduced solid volume fraction, ϕ/ϕm, with ϕm maximum flowable packing and (2) “frictional” macroscopic friction coefficient, μ, viscous number, Iv, defined ratio shear to wall-normal particle stress. Our goal is compare frameworks, focusing on effect between particles. We have conducted particle-resolved...
Abstract TNO Prins Maurits Laboratory has actively followed and contributed to the research on development of insensitive munitions (IM). One initial topics at focused improvement shape RDX crystals its relation shock sensitivity. The variation crystal been studied by crystallization from different solvents and/or post‐treatment crystals. role mean particle size sensitivity was also included in these analyses. decrease is even more pronounced when controlling internal quality In meantime...
Abstract The product quality of energetic materials is predominantly determined by the crystallization process applied to produce these materials. It has been demonstrated in past that higher solid ingredients, less sensitive a plastic bonded explosive containing becomes. application submicron or nanometric generally considered further decrease sensitiveness explosives. In order assess materials, range analytical techniques available. Recent attempts within Reduced‐sensitivity RDX Round...
Abstract Submicrometer‐sized RDX and HMX crystals were produced by electrospray crystallization submicrometer‐sized plasma‐assisted crystallization. Impact friction sensitivity tests ballistic impact chamber performed to determine the product sensitivity. Rather than reflecting quality of particles, we found be unreliable for submicrometer particles. The used test was not accurate enough, while in distributed among grooves porcelain plate or grains sandpaper these tests. These observations...
There is an ongoing forensic and security need for rapid, on-scene, easy-to-use, non-invasive chemical identification of intact energetic materials at pre-explosion crime scenes. Recent technological advances in instrument miniaturization, wireless transfer cloud storage digital data, multivariate data analysis have created new very promising options the use near-infrared (NIR) spectroscopy science. This study shows that addition to drugs abuse, portable NIR with also offers excellent...
Abstract Studying links between triacetone triperoxide ( TATP ) samples from crime scenes and suspects can assist in criminal investigations. Isotope ratio mass spectrometry IRMS gas chromatography GC )‐ were used to measure the isotopic compositions of its precursors acetone hydrogen peroxide. In total, 31 synthesized with different raw material combinations reaction conditions. For carbon, a good differentiation linear relationship observed for acetone– combinations. The extent negative (δ...
Nonphotochemical laser-induced nucleation (NPLIN) is a promising primary control method, yet its underlying mechanism remains elusive. To contribute to the discussion on whether polarization of laser irradiation in NPLIN experiments influences polymorphic outcome, we revisit with aqueous glycine solutions supersaturations ranging between S = 1.5 and 1.7 irradiated by nanosecond pulses (∼7 ns) near-infrared wavelength (1064 nm). Systematically altering light excitation properties, including...
In this follow-up study the collaboration between two research groups from USA and Netherlands was continued to expand framework of chemical attribution for homemade explosive erythritol tetranitrate (ETN). Isotope ratio mass spectrometry (IRMS) analysis performed predict possible links ETN samples its precursors. Carbon, nitrogen, hydrogen oxygen isotope ratios were determined a wide variety precursor sources that prepared with selected The stability has been demonstrated melt-cast two-year...
Hydrazinium nitroformate (HNF) has been under renewed development since the late 1980s. These research and efforts have demonstrated that it is possible to produce HNF crystals with acceptable morphology stability. Although production of based on a simple acid-base reaction, resulting product strongly depends synthesis crystallization techniques used. For propellant oxidizer, control size (distribution) in phase important. The effect different processes investigated, results are reported....
Accurate Calcium Oxalate Monohydrate (COM) solubility measurements are essential for elucidating the physiochemical mechanism behind formation of kidney stones, nephrolithiasis. Yet reported values COM in ultrapure water, arguably simplest solvent relevant nephrolithiasis, vary significantly depending on implemented method. To address this variation, we present an experimental study validated by a model based Debye–Hückel theory describing solution chemistry and complex formation. We also...