Dispersion Letters - Aims and Scope
Dispersion letters is an information platform dedicated to spread and exchange information between those working in various fields of dispersion research, phase separation, formulation, dispersion processing and quality control.
It is dedicated predominantly to experimental and applicational work explored with analytical instruments developed by LUM. Dispersion Letters publishes on-line articles, technical notes and reviews.
Our latest entries
Determine easily the influence of an additive by direct accelerated stability testing
2023, English
Cosmetics, personal and home care products are often formulated as dispersions. Separation stability is one of their important characteristics. Its determination in real-time is often contradictory to the market demands of a quick product release. Instrumental methods for the accelerated stability testing belong to the concepts of choice to provide quick information in R&D as well as in QC/QA. Physical acceleration at different temperatures in combination with a patented optical technology is presented here on the example of a nail polish without and with a stabilizing additive.
More … Determine easily the influence of an additive by direct accelerated stability testing
1 mm LUMiCells in der Stabilitäts- und Separationsanalyse sehr trüber Emulsionen
2022, German
Im 30-minütigen Webinar "1 mm LUMiCells in der Stabilitäts- und Separationsanalyse sehr trüber Emulsionen" möchten wir Ihnen anhand zweier Fallstudien aus der Praxis anschauliche Beispiele liefern und konkrete Lösungen für Ihre besonders herausfordernden Formulierungen anbieten.
More … 1 mm LUMiCells in der Stabilitäts- und Separationsanalyse sehr trüber Emulsionen
Abstracts International Conference Dispersion Analysis & Materials Testing 2022
2022, English
Here we upload all the lecture abstracts for the Int'l Conference for Dispersion Analysis & Materials Testing 2022 that will be held on January 24–25, 2022.
More … Abstracts International Conference Dispersion Analysis & Materials Testing 2022
Characterization of suspensions and emulsions by means of multiwavelength reflectance and machine learning methods
2022, English
Monitoring of product compositions is essential for the control of unit processes. Product quality parameters have to be observed in almost real-time and the sensor should be used for different applications. This contribution introduces the Multi-Reflectance-Spectroscopy (MRS) as an innovative technique based on multiwavelength reflectometry for in-situ quality/process control of suspensions and emulsions.
Filter Media And Membrane Testing By Micro- And Nano-particles: Determination Of Size And Count By A Single Particle Spectrophotometer
2022, English
Filter media design and its performance in the production process demand a thoroughly quantitative assessment. Important characteristics are filter types, used materials, permeability, resistance, to name a few. In this paper we describe a recently developed flowcytometer (LUMiSpoc®).
Sedimentation of Bidisperse Polymer Suspensions in Aqueous Polymer Solutions
2022, English
Dissolved NaCMC induced flocculation affecting sedimentation even for micron-sized model particles if viscous forces are sufficiently high. At high NaCMC concentrations shear-thinning like separation behaviour was observed, and in case of the smaller polymer particles also a lack of traceable separation below a critical centrifugal force.
More … Sedimentation of Bidisperse Polymer Suspensions in Aqueous Polymer Solutions
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