Malvern Instruments Adds ‘Suspension Properties’ Series to Its Highly Popular Online Masterclasses

4 Jul 2013
Sarah Thomas
Associate Editor

Product news

Malvern Instruments has kicked off a brand new series of Masterclass webinars available both as live events and subsequently as recorded presentations. Based on the company’s established Masterclass concept, the ‘Masterclass on Suspension Properties’ series guides participants on how to use rheology in combination with other analytical techniques in order to formulate suspensions to meet specific performance targets. The information is delivered in a very straightforward style, making the subject easily accessible and comprehensible to the broadest of audiences.

The webinars will run throughout the year and are expected to be especially useful for anyone new to rheology, or looking to effectively apply rheological analysis to the optimization of suspension/dispersion products. If you miss any of the live events then simply follow the links to the recorded versions.

Many everyday products are suspensions or dispersions of particles in a liquid medium, ranging from adhesives and paints and inks through to food and drink, personal care and pharmaceutical products. The physical properties of the dispersed particles, such as average particle size, particle size distribution, zeta potential or charge on the particles, and even particle shape, can all strongly influence the overall (bulk) rheological properties of the suspension, thereby defining their performance in any given application. The series will tackle each of these variables in turn, exploring how rheology measurements can be used alongside other data to engineer and develop optimal suspension performance.

June’s series opener ‘Influence of particle size and distribution on rheology’ focused on the impact of particle size and size distribution and strategies for manipulating these parameters to control rheological behaviour. For example, increasing particle size for a given solids loading tends to decrease viscosity, but changing the characteristics of the size distribution profile is also an important lever for control. As a result, particle size and size distribution are primary variables for investigation when it comes to controlling suspension properties.

A non-commercial, educational series, the suspension properties Masterclass program extends Malvern’s already comprehensive rheology resource base, which can be freely accessed via the website. The series is being presented by Malvern technical and applications experts and draws on the company’s unique skill set in particle sizing as well as rheology.

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RheometryRheometers are used to measure the rheology of fluids, which is the flow of fluids in response to an applied force. The most common types of rheometer include shear rheometers (capillary, cone and plate and rotational cylinder) and extensional rheometers. Viscometers are similar to rheometers however viscometers only measure the viscosity of a fluid.Particle CharacterizationParticle characterization instruments are used to determine particle size distribution, shape, surface area, zeta potential, density and porosity of particles and materials. Multiple tecchniques are available for determining particle size, shape and count including dynamic light scattering (DLS), laser diffraction, electrozone (Coulter technique), imaging particle analysis and single particle optical sensing. Determine the density of your material with a gas pycnometer or examine its surface area and porosity with gas adsorption analyzers and mercury porosimeters. Find the best particle characterization instruments in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.RheologyZeta Potential
Malvern Instruments Adds ‘Suspension Properties’ Series to Its Highly Popular Online Masterclasses