Particle & Particle Systems Characterization

Cover image for Particle & Particle Systems Characterization

Special Issue: Particulate Systems Analysis

August, 2006

Volume 23, Issue 2

Pages 115–218

  1. Contents

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Calendar
    6. Instructions for Authors
  2. Editorial

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Calendar
    6. Instructions for Authors
    1. Editorial: Part. Part. Syst. Charact. 2/2006 (page 119)

      Richard A. Williams

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200690005

  3. Research Articles

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Calendar
    6. Instructions for Authors
    1. From Single Particle Interactions to Bulk Powder Flow: Application to Uranium Oxide Powders (pages 121–126)

      Miguel A. S. Quintanilla, Matthieu George, Dave T. Goddard and J. Terry Semeraz

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601019

      AFM measurements are performed to measure normal and lateral particle interaction forces of model systems and industrially relevant irregular particles. This data is used to derive parameters for use in granular media models to simulate bulk powder flow.

    2. Evaluation of the Mechanical Resistance of a Powder-powder Coating by Modulated Dry Feed Particle Size Analysis (pages 127–132)

      Ana Vilela, Lucia Concepcion, Philippe Accart, Alain Chamayou, Michel Baron and John A. Dodds

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601020

      The coating of ‘host’ particles with much smaller ‘guest’ particles is a versatile method to dramatically change the behaviour of powders. Here, a method for evaluating the strength of host-guest interactions based on standard particle size analysis is presented. It is shown that the strength of the coating is related to the mechanical forces during the coating process.

    3. Measurement of Charge Transfer due to Single Particle Impact (pages 133–137)

      Hideo Watanabe, Abdolreza Samimi, Yu Long Ding, Mojtaba Ghadiri, Tatsushi Matsuyama and Kendal G. Pitt

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601021

      This paper describes a new test rig to measure the charging of single particles upon impacting on a plane target. It is then used to study charging of pharmaceutical particles impacting on a steel plate. The amount of charge transfer is derived as function of impact velocity, impact angle and initial charge.

    4. Measuring Size Distribution of Organic Crystals of Different Shapes Using Different Technologies (pages 138–144)

      Kumar Patchigolla, Derek Wilkinson and Mingzhong Li

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601022

      In this study size measurements using ultrasonic attenuation, laser diffraction and image analysis are compared and the influence of particle shape is investigated. Significant variations in measured size distributions are detected with different shapes. Form factors derived from image analysis are further used to derive an equivalent particle size distribution form ultrasonic attenuation.

    5. In-line Comparison of Particle Sizing by Static Light Scattering, Time-of-Transition, and Dynamic Image Analysis (pages 145–153)

      Hans Saveyn, Tran Le Thu, Ruxandra Govoreanu, Paul Van der Meeren and Peter A. Vanrolleghem

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601023

      Different techniques for measuring particle size distributions in suspensions are applied in series allowing simultaneous measurements of the samples. The specific advantages and limitations are shown and discussed in detail. Especially the influence of material parameters, concentration and particle size range is discussed in detail.

    6. Characterization of the Dispersion Behavior of Powders in Liquids (pages 154–158)

      Carol Goalard, Arezai Samimi, Laurence Galet, John A. Dodds and Mojtaba Ghadiri

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601024

      Dispersion of agglomerated powders in liquids is studied as depending on the surface energy and the structural properties of the granules. This is examined for the example of talc powder agglomerated in different ways and then the dispersion behaviour is studied as a function of the characteristics of the granules.

    7. The Use of an Exact Light-Scattering Theory for Spheroidal TiO2 Pigment Particles (pages 159–164)

      Juho-Pertti Jalava

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601025

      A new method for process and quality control by measuring crystal and particle size distributions is presented. The so-called turbidity spectrum method measures the whole turbidity spectrum which is then evaluated using a T-Matrix calculation of light scattering by spheroidal particles. An excellent repeatability of the measurements is shown.

      Corrected by:

      Erratum: The Use of an Exact Light-Scattering Theory for Spheroidal TiO2 Pigment Particles

      Vol. 23, Issue 3-4, 338, Version of Record online: 23 OCT 2006

    8. Single Particle Detection and Size Analysis with Statistical Methods from Particle Imaging Data (pages 165–169)

      Benno Wessely, Stephan Gabsch, Justus Altmann and Frank Babick

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601034

      Imaging techniques are versatile methods for particle characterization in the micrometer size range. This paper compares two very different imaging techniques, namely identification of individual particles and a statistical method to analyze even overlapping clusters of particles in higher concentrated systems.

    9. Obtaining Particle Size Distribution from Chord Length Measurements (pages 170–174)

      Mingzhong Li, Derek Wilkinson and Kumar Patchigolla

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601026

      The focused-beam reflectance method is a popular method for on-line measurements of chord length distributions. This paper describes a model to correlate particle size distributions to chord length distributions for different particle shapes. Furthermore, an inversion algorithm is discussed to calculate the desired size distribution.

    10. Ultrasonic Particle Sizing of Disperse Systems with Partly Unknown Properties (pages 175–183)

      Frank Babick, Michael Stintz and Andreas Richter

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601027

      Ultrasonic attenuation spectroscopy is a popular method for size characterization of suspensions and emulsions. This paper outlines two strategies allowing elicitation of size information when the relevant material parameters are only partially known. Both strategies are tested with colloidal suspensions and an extensive discussion of the results is provided.

    11. Particle Size Distribution by Space or Time Dependent Extinction Profiles obtained by Analytical Centrifugation (pages 184–187)

      Torsten Detloff, Titus Sobisch and Dietmar Lerche

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601028

      A Photocentrifuge is used to measure size distributions of colloidal suspensions. This paper presents two alternative methods including a mathematical description to derive size distributions by either measuring the time-dependent extinction at any point or of the spatial variation of the extinction profile over the entire sample for some time.

    12. Development of a Photon Correlation Spectroscopy Instrument to Measure Size Distributions of Nanoparticles (pages 188–192)

      Tetsuji Yamaguchi, Yasushi Azuma and Kikuo Okuyama

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601029

      This paper presents a new method for measuring size distributions of colloidal nanoparticles. While chromatography separates the samples into quasi-monodisperse parts, they are then analyzed by photon correlation spectroscopy. The method is compared with scanning electron microscopy and very good agreement is demonstrated.

    13. Protein and Nanoparticle Characterisation Using Light Scattering Techniques (pages 193–196)

      Michael Kaszuba and Malcolm T. Connah

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601030

      A dynamic light scattering instrument is discussed using non-invasive back-scattering. This novel arrangement maximises the detection of scattered light while maintaining signal quality. This results in an increase of both particle size range and concentration range. Furthermore, absolute molecular weights can be determined from this arrangement using static light scattering.

    14. NanoParticle Tracking Analysis – The Halo™ System (pages 197–204)

      Andrew Malloy and Bob Carr

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601031

      A new technique for nanoparticle sizing in liquids based on direct visualization of Brownian motion is described. The technology comprises a metallised optical element illuminated by a laser beam at the surface of which particles can be directly visualized, sized and counted using only a conventional optical microscope fitted with a low-cost camera and a dedicated software. The system shows very good results in a particle size range from approx. 10 to 600 nm.

    15. Comparative Studies of Dispersant Optimization Techniques for Evaluating Stability of Alumina Slurries (pages 205–209)

      Stoyan Gaydardzhiev, Peter Ay and Marta Janeczko

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601033

      This paper compares four different methods for evaluation of the dispersibility properties of a deflocculant towards stabilization of submicron alumina powder suspended in water. Namely, zeta potential measurements by colloidal vibrational current, streaming current, sedimentation and capillary suction time have been applied.

    16. Size and Structure Characterization of Dye Flocs during Coagulation of Reactive Black 5 Dye (pages 210–214)

      Marta Janeczko and Stoyan Gaydardzhiev

      Version of Record online: 9 AUG 2006 | DOI: 10.1002/ppsc.200601032

      Agglomerate size distribution measurements using time-of-transition principle and determination of fractal dimension by static low-angle light scattering of flocculated dyes are performed. Complementary, image analysis was applied. It is shown that optimum flocculant dosage gives large flocs with a high value of the fractal dimension.

  4. Calendar

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Calendar
    6. Instructions for Authors
  5. Instructions for Authors

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Calendar
    6. Instructions for Authors

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