Physicochemical Characterization of Anionic and Cationic Microemulsions: Water Solubilization, Particle Size Distribution, Surface Tension, and Structural Parameters

2014 ◽  
Vol 59 (8) ◽  
pp. 2490-2498 ◽  
Author(s):  
Achinta Bera ◽  
Ajay Mandal ◽  
T. Kumar
Keyword(s):  
Surface Tension ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Structural Parameters ◽  
Physicochemical Characterization ◽  
Water Solubilization

Characterization of chemical composition and particle size distribution of aerosols released during laser cutting of fuel debris simulants

2020 ◽  
Vol 8 (4) ◽  
pp. 103872 ◽  
Author(s):  
C. Dazon ◽  
E. Porcheron ◽  
C. Journeau ◽  
C. Suteau ◽  
C. Chagnot ◽  
...  
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Laser Cutting

Characterization of micro-crystalline structure and particle size distribution of soot generated from MILD-OCC flame

Fuel ◽  
2020 ◽  
Vol 267 ◽  
pp. 117259
Author(s):  
Shuwei Zhang ◽  
Jianyi Lu ◽  
Chunjing Liu ◽  
Qian Feng
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Crystalline Structure

Characterization of particle size distribution of mainstream cigarette smoke generated by smoking machine with an electrical low pressure impactor

2014 ◽  
Vol 26 (4) ◽  
pp. 827-833 ◽  
Author(s):  
Xiang Li ◽  
Haohui Kong ◽  
Xinying Zhang ◽  
Bin Peng ◽  
Cong Nie ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Cigarette Smoke ◽  
Low Pressure ◽  
Mainstream Cigarette Smoke

Characterization of 2D MoS2 and WS2 Dispersed in Organic Solvents for Composite Applications

MRS Advances ◽  
2016 ◽  
Vol 1 (32) ◽  
pp. 2303-2308 ◽  
Author(s):  
Alberto Delgado ◽  
Jorge A. Catalan ◽  
Hisato Yamaguchi ◽  
Claudia Narvaez Villarrubia ◽  
Aditya D. Mohite ◽  
...  
Keyword(s):  
Particle Size ◽  
Structural Analysis ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
2D Materials ◽  
Xrd Analysis ◽  
Solution Processing ◽  
Distribution Analysis ◽  
Compositional Uniformity

ABSTRACTIn this work, we have explored the prospects of MoS2 and WS2, both of which are semiconducting 2D materials, for potential composite applications. In order to form 2D materials composites we have to first disperse them chemically in solution. MoS2 and WS2 powders were oversaturated in N-Methyl-2-pyrrolidone (NMP) solution at 37.5 mg/mL and sonicated at room temperature (RT) for sonication times ranging from 30 minutes to close to 24 hours. After solution processing, the samples with the 2D flakes were transferred to an Isopropyl Alcohol (IPA) bath for particle size distribution analysis. We have observed significant changes in particle size distribution spanning two orders of magnitude as a function of the sonication conditions. Specifically, the observed changes in particle size distribution for MoS2 and WS2 powders ranged from 44 microns down to 0.409 microns, and 148 microns down to 0.409, respectively, as compared to the untreated materials. Structural analysis was conducted using the SEM and X-Ray diffraction. The structural analysis using the SEM revealed morphological signatures between the two materials, where the MoS2 flakes had a randomly oriented distribution with occasional triangular flakes. In the case of the WS2, regardless of the sonication conditions, the WS2 flakes seemed to have a characteristic 120° angular distribution at the vertices, representing a rhombus with concave edges. The XRD analysis showed a minute shift in the characteristic peaks that maybe due to strain-induced effects as a result of the solution processing. Optical characterization of the materials was also conducted using Raman Spectroscopy to validate the average layer number resulting from the solution dispersions and the spatial and compositional uniformity of the two material samples.

scholarly journals Characterization of Aerosol Nebulized by Aerogen Solo Mesh Nebulizer

2020 ◽  
Vol 328 ◽  
pp. 01006
Author(s):  
Ondrej Misik ◽  
Milan Maly ◽  
Ondrej Cejpek ◽  
Frantisek Lizal
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Aerodynamic Diameter ◽  
Jet Nebulizers ◽  
Mass Median

Nebulizers are commonly used devices for inhalation treatment of various disorders. There are three main categories of medical nebulization technology: jet nebulizers, ultrasound nebulizer, and mesh nebulizer. The mesh nebulizers seem to be very promising since this technology should be able to produce aerosol with precisely determined particle size and is easy to use as well [1]. Aerosol generated from the mesh nebulizer Aerogen Solo was measured in this work. Particle size distribution with a mass median of aerodynamic diameter (MMAD) was determined by two different methods.

The Influence of Milling Regimes in Beater Mill on Particle Size Distribution and Structural Characteristics of Strontium Hexaferrite Powder

2018 ◽  
Vol 284 ◽  
pp. 158-162
Author(s):  
I.N. Yegorov ◽  
Nikolay Ya. Egorov
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Fluidized Bed ◽  
Structural Parameters ◽  
Average Particle Size ◽  
Strontium Hexaferrite ◽  
Average Particle ◽  
Electromagnetic Effect ◽  
Coarse Material

The paper experimentally substantiates effectiveness of method of milling particulate ferromagnetic materials in magneto fluidized bed. Comparative results of particle size distributions and structural parameters of strontium hexaferrite SrFe12O19 powder obtained by milling coarse material in beater mill without electromagnetic effect and in same mill with formation of magneto fluidized bed from mill material are presented. The magneto fluidized bed is formed by constant and alternating gradient magnetic fields with induction lines that are mutually perpendicular and parallel to the plane of rotating beaters. It is shown that application of electromagnetic effect to milling coarse material in beater mill allowed to greatly intensify that process, significantly increase powder quality: increase particle size distribution uniformity and decrease average particle size from 1558.50 μm to 0.56 μm after 120 minutes of processing in the mill. X-ray diffraction analysis showed that milling in beater mill in magneto fluidized bed leads to reduction of coherent-scattering region size, increase of lattice microstrain and dislocation density, making powder more active during sintering process.

Characterization of components of nano-energetics by small-angle scattering techniques

2007 ◽  
Vol 22 (7) ◽  
pp. 1907-1920 ◽  
Author(s):  
Joseph T. Mang ◽  
Rex P. Hjelm ◽  
Steven F. Son ◽  
Paul D. Peterson ◽  
Betty S. Jorgensen
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Small Angle ◽  
Particle Morphology ◽  
Small Angle Scattering ◽  
Nanoparticle Size ◽  
X Rays ◽  
Angle Scattering

Small-angle scattering (SAS) and ultra small-angle scattering techniques, employing x-rays and neutrons, were used to characterize six different aluminum nanopowders and nanopowders composed of molybdenum trioxide and tungsten trioxide nanoparticles. Each material has different primary particle morphology and aggregate and agglomerate geometry, and each is important to the development of nano-energetic materials. The combination of small-angle and ultra small-angle techniques allowed a wide range of length scales to be probed, providing a more complete characterization of the materials. For the aluminum-based materials, differences in the scattering of x-rays and neutrons from aluminum and aluminum oxide provided sensitivity to the metal core and metal oxide shell structure of the primary nanoparticles. Small-angle scattering was able to discriminate between particle size and shape and agglomerate and aggregate geometry, allowing analysis of both aspects of the structure. Using the results of these analyses and guided by scanning electron microscopy (SEM) images, physical models were developed, allowing for a quantitative determination of particle morphology, mean nanoparticle size, nanoparticle size distribution, surface layer thickness, and aggregate and agglomerate fractal dimension. Particle size distributions calculated using a maximum entropy algorithm or by assuming a log-normal particle size distribution function were comparable. Surface area and density determinations from the small-angle scattering measurements were comparable to those obtained from other, more commonly used analytical techniques: gas sorption using Brunauer–Emmett–Teller analysis, thermogravimetric analysis, and helium pycnometry. Particle size distribution functions derived from the SAS measurements agreed well with those obtained from SEM.

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