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Rheology

Rheology is the study of flow and deformation of materials under applied forces which is routinely measured using a rheometer. The measurement of rheological properties is applicable to all materials – from fluids such as dilute solutions of polymers and surfactants through to concentrated protein formulations, to semi-solids such as pastes and creams, to molten or solid polymers as well as asphalt. Rheological properties can be measured from bulk sample deformation using a mechanical rheometer, or on a micro-scale by using a microcapillary viscometer or an optical technique such as Microrheology.

Dynamic Light Scattering, Gel permeation chromatography, Kinexus, Laser Diffraction, Malvern Panalytical Events, Meet the Experts, Molecular weight, Nanoparticle Tracking Analysis, Nanosight, OMNISEC, Particle concentration, Particle size, Rheology, Rheometry, Tech Talk, Viscotek, Zeta potential, Zetasizer »

[30 Jan 2018 | ]

We will be attending Pittcon 2018 in Orlando, Florida Feb 26th – Mar 1st and once again we are pleased to feature a number of our recognized characterization experts who will be presenting a variety of short courses throughout the week.
Time is running out, so don’t miss out on the early bird deadline for discounted admission which ends on February 5th.
Below is a listing of our available short course offerings.
We look forward to seeing you in Orlando at one of our short courses and our Booths #2118 & #2119.
Monday, February 26th
Fundamentals of Particle …

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Français, Kinexus, Rheology »

[19 Jan 2018 | ]

Le congrès du GFR est la réunion annuelle des rhéologues français. L’édition 2017 était très réussie avec un programme social intéressant dans la très belle ville de Nice.
Le congrès a enchaîné des sessions posters, quatre conférences plénières et des présentations orales avec entre autre celle de Frédéric Fraïsse qui a présenté la « Caractérisation de suspensions de nanoparticules de SiO2 » (voir photo ci-contre). Le congrès prévoyait également des espaces des discussions informelles et conviviales autour des stands d’exposition d’instruments auxquels nous avons participé.
Au cours du dîner de Gala, plusieurs prix ont été …

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Français, Kinexus, Meet the Experts, Rheology, Rheometry »

[17 Jan 2018 | ]

Lors du 52ème Congrès du Groupe Français de Rhéologie (GFR), Guillaume Ovarlez (Directeur de recherche au CNRS, Laboratoire du Futur CNRS-Solvay, Pessac, France) a reçu le prix Maurice Couette et présenté ses travaux sur les inhomogénéités dans les écoulements de suspensions concentrées pour lesquels des rhéomètres de la gamme Kinexus ont été utilisés.
https://partage.legfr.social/index.php/s/ug25vSvEfExKacE
Monsieur Ovarlez a notamment expliqué que la rhéométrie classique fonctionnait très bien dès lors que les matériaux étudiés sont homogènes et que l’écoulement et lui aussi homogène. Cependant la structure des suspensions et leur écoulement peuvent s’influencer.
Ainsi, les …

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Archimedes, Binding affinity and Kd, Chemical identification, Differential Scanning Calorimetry, Dynamic Light Scattering, Gel permeation chromatography, Image Analysis, Label-free analysis, MicroCal, Microcalorimetry, Morphologi, Nanoparticle Tracking Analysis, Nanosight, Particle concentration, Particle shape, Particle size, Protein Aggregation, Raman spectroscopy, Resonant mass measurement, Rheology, Size Exclusion Chromatography, Taylor Dispersion Analysis, Tech Talk, Viscosizer TD, Viscotek, Zetasizer »

[21 Sep 2017 | ]

I know this sounds like the beginning of a bad joke, but in this case, it was actually the beginning of the 2017 Colorado Protein Stability Conference, held in July at Beaver Run Resort in Breckenridge, Colorado. In attendance was a range of scientists and researchers from all over the world, with one common subject in mind: Protein Stability.

One of the highlights of this conference was the pre-conference workshop. This was a free workshop for all attendees of the conference, which was sponsored by Malvern Panalytical. The workshop included a range …

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Kinexus, Meet the Experts, Rheology, Rheometry »

[27 Jun 2017 | ]

Last year I went on a rheology tour!! I gave 12 talks in 10 days in 7 locations around Australia and New Zealand, talking primarily about suspension rheology and how particle characteristics such as particle size and shape affect rheology.
I spoke about the stability of suspensions and the factor to consider when assessing suspension stability but another major focus was the viscoelastic properties of materials.
Viscoelasticity: A material that possesses both liquid and solid-like properties which may change depending on how we handle and treat it.
One great example of a viscoelastic material is pitch, asphalt or bitumen …

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Claisse, Kinexus, Malvern Panalytical Events, Rheology »

[15 Jun 2017 | ]

To support the growing interest in Malvern PANalytical technologies for use in the food and drink industry, we held a joint free seminar devoted to this extremely important industry sector. This took place on Wednesday, June 8th in the Marriott Hotel Schaumburg, Chicago and saw more than 20 enthusiastic attendees from the food industry attend for an applications-focused set of presentations stressing the importance of Malvern PANalytical’s  complementary analytical techniques and the value they add to this sector.  We kicked off with a ‘Deluxe Continental Breakfast’ as befitting the attendees.

Personally, I must say that this was …

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Kinexus, Rheology, Tech Talk »

[8 Jun 2017 | ]

How to best measure a viscosity flow curve?
 
Choosing the right measuring geometry and preventing measurement artifacts
There are several ways to obtain viscosities at different shear rates using a rotational rheometer. For instance, we could gently ramp through the different speeds starting at the lowest and ending at the highest (good for a quick measurement where time is of the essence).  Alternatively, we could step through the required shear rates as discussed later, while waiting for a steady state viscosity at each step.  This is known as generating an equilibrium flow …

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Kinexus, Meet the Experts, Rheology, Rheometry »

[9 May 2017 | ]

Controlling the performance of an ink is a complex optimization challenge. Understanding how features of the system, the dispersed particle size in particular, impact stability and behavior during each stage of the printing process is crucial for effective formulation.
Over the past 30 years, the use of commercial and industrial inks has changed substantially. In particular, the maturation of inkjet technology has revolutionized printing. From office printers through to industrial coding and marking systems, inks are now required to meet demanding performance targets, for a wide range of different applications.
Inks are …

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Kinexus, Malvern Panalytical Events, Meet the Experts, Rheology, Rheometry »

[6 Apr 2017 | ]

This week is the Annual European Rheology Conference (AERC) held in beautiful Copenhagen. It has been a great conference so far with the opening reception at the City Hall – what an impressive building.

Malvern had a talk on Tuesday with our very own Nordic Rheology Specialist, Mats Larsson, talking about how “Creep testing can be used as an alternative to multi wave oscillation for determining the true gel point of network polymers“.
The session was appropriately chaired by Professor Henning Winter who along with Francois Chambon set out the criterion for …

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Binding affinity and Kd, Differential Scanning Calorimetry, Dynamic Light Scattering, Français, Gel permeation chromatography, Image Analysis, Isothermal Titration Calorimetry, Laser Diffraction, Meet the Experts, Molecular size, Nanoparticle Tracking Analysis, Particle concentration, Particle size, Rheology, Rheometry, Size Exclusion Chromatography, Static Light Scattering, Zeta potential »

[21 Feb 2017 | ]

Afin de vous apporter un support concret pour utiliser votre système de façon optimale, finaliser vos bonnes pratiques de laboratoire et répondre à vos besoins spécifiques, Malvern organise des formations sur site ou en sessions dans nos 3 agences françaises (Orsay, Lyon et Toulouse).
Voici les dates de toutes les sessions programmées pour 2017 :
CARACTERISATION DES PARTICULES PAR DIFFRACTION LASER
Objectifs : Perfectionner les méthodes de caractérisation des particules en voie sèche et liquide, définir les bonnes pratiques de laboratoire et s’adapter aux besoins spécifiques de chaque installation. Comprendre le principe physique …

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Kinexus, Rheology, Tech Talk »

[17 Jan 2017 | ]

Why measure a viscosity flow curve, rather than just give a number?
 

Very often chemists are asked to provide a single viscosity value for a product or formulation without much information about the required conditions of the measurement.  For an oil or low viscosity liquid which is Newtonian this is pretty straightforward, so long as your viscometer is properly calibrated and the measurement temperature is provided. However, most industrially interesting or complex fluids such as polymer solutions, suspensions and emulsions are non-Newtonian, meaning that their viscosity varies with shear rate – …

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Kinexus, Mastersizer, Particle size, Rheology »

[1 Dec 2016 | ]

Peeling back the foil on a gold coin. Popping a perforated window on a festive calendar. Pursuing your favourite coloured wrapper around a bowl. The prize inside many little packages we open this season will be chocolate.
The secret of chocolate’s almost universal appeal is in the mouthfeel the “snap” of the first bite, how the chocolate melts and how it coats the inside of the mouth. Despite being a consumer experience, mouthfeel is strongly related to materials science – chocolate being a complex composite material.
Our instruments hold the key to many of …

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Kinexus, Rheology »

[27 Oct 2016 | ]

It is time to pop on my curly false moustache and chef’s hat to become high, mighty and judgmental about what has been bothering me lately: the ‘not so’ culinary delights on the rheology road….
I travel – a lot! On my travels, I experience a variety of ‘on-the-go’ foods and hotel restaurant experiences. Since I am a rheology specialist and food science and texture ultimately encompasses the science of rheology, I have a tendency to overanalyze everything I eat.

Sauces, custards, creams and gravies… viscosity and consistency…it bothers me! We’ve all …

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Malvern Panalytical Events, Particle shape, Particle size, Rheology »

[6 Oct 2016 | ]

Best practices for characterizing and manufacturing battery slurries and electrodes
The market for batteries is rapidly growing, and the increased demand for portable electronic devices, including mobile phones and laptops requires greater advances in battery technology in order to provide a light weight, long lasting and stable power source. Battery technology is also being pushed further in electric vehicle applications, which require even more lightweight, higher power and faster charging batteries.

Critical for the development and production of a battery is getting the right material composition and putting it together in such …

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Kinexus, Meet the Experts, Rheology »

[12 Sep 2016 | ]

Asphalt Expert Task Group Meeting

The Federal Highway Administration (FHWA) Expert Task Groups (ETGs) on Asphalt Mixtures and Binder Technology is organizing meetings on September, 12-15, 2016.
The upcoming meetings will take place at the University of Mass Dartmouth Campus outside of Falls River, MA – USA.
The purpose of Expert Task Groups (ETG) is to coordinate, develop, and improve national guidance and recommendations for the improvement of asphalt pavement mixtures and asphalt binders.
These groups provide feedback as well as encourage correct utilization and improvement of state-of-the-practice solutions. They also represent all aspects of …

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Malvern Panalytical Events, Rheology »

[7 Aug 2016 | ]

We have been waiting four years for this global event to return but it’s finally here. No, not the Olympics but the 17th International Congress of Rheology!
Like the Olympics this event is held every four years with the last one being held in Lisbon, Portugal in 2012 and this time in Kyoto, Japan. The event starts on 8th August and runs until the 13th August and brings together the world’s leading rheologists to present the latest advances and developments in this expanding field.
There are 19 sessions, covering both pure and applied …

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Rheology, Tech Talk »

[9 Jun 2016 | ]

Using rheology for faster, smarter material formulation
Rheology is often perceived as a theoretical, highly mathematical discipline but in fact it has very practical relevance in defining the behaviour of a wide range of materials including cement, asphalt, cosmetics, foods, paints, inks, blood and much more. Rheology is all around us and we are constantly performing rheological testing every time we apply a force to one of these materials in order to deform it or make it flow at the desired rate, be it squeezing toothpaste, spreading cement, or chewing food.  The …

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Kinexus, Rheology, Rheometry, Tech Talk »

[17 May 2016 | ]

Over the last few years, the nail polish industry has really opened up its beauty box of tricks, and on the market today, to name but a few, we see nail polishes with “magnetic, gel, matte, glitter, crackle, stamping, quick-dry, caviar, sponge, color changing, leather and sandy” effects. There are also nail polishes with kale, silk and nylon extracts! It really has turned into an art form. However, in order for us to appreciate the wonders of these magical nail polishes, there must be some exciting science behind it all?
I …

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Kinexus, Rheology »

[11 Feb 2016 | ]

Rheological – geological – but not mythological…
Pluto (not the Disney character – that’s another story) is a word that provokes emotion and comment. This ‘Planet X’ discovered in 1930 by a young graduate student Clyde Tombaugh, never fails to excite the science in all of us.
Demoting Pluto as a ‘real’ planet to a ‘dwarf’ planet a few years back attracted controversy with a huge public outcry and input for and against – the case for demotion was made mainly by a small bunch of political astronomers, it has to be said, so you can …

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Meet the Experts, Particle size, Rheology, Zeta potential »

[29 Sep 2015 | ]

When you see the words “perfect packing” are you thinking of getting ready for that vacation and neatly folding your swimming costume and other clothes into your suitcase?  Or are you thinking of the worst-suitcase scenario when you’re packing after your vacation and trying to get that didgeridoo, boomerang,  and other assorted odd-sized souvenirs into that same suitcase, finding you have a problem, and having to buy another suitcase or ship the odd-shaped ornaments by other routes?
 
I won’t bore you with the story of trying to be smart, shipping my …

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