VISCOSITY MEASUREMENTS APPLICATIONS | EMS-1000S
Viscosity measurements of Aqueous Polymers, Antibody Solutions, Adhesives, Ionic Liquids and Luminescent Materials:
We present a selection of customers applications where the EMS Viscometer is the predestined or perhaps even the only solution to perform the required viscosity measurements.
Fluid mechanics are important in chemical engineering – the corresponding dimension less numbers (Reynolds Number, Prandtl Number) are widely used in optimization and scale-up of chemical synthesis. To evaluate these dimensionless numbers, the viscosity in the process under investigation must be examined under realistic conditions. This often requires viscosity measurements at elevated temperatures and pressures.
The same is the case if reaction kinetics must be studied under real conditions based on viscosity changes which occur during a reaction.
The EMS Viscometer is the ideal tool for such applications, as it easily allows to monitor the viscosity during reactions at elevated temperatures and pressures. With the EMS Viscometer it is thus possible, for example, to monitor the viscosity during a polymerization process at 150°C under a pressure of 5 bar.
The preparation of specific antibodies (immunoglobulin) is time consuming and expensive. In research, newly developed antibodies are therefore available only in very small quantities. In most of cases, immunoglobulin solutions are handled with automatic pipettes. To make sure that automatic pipetting works smoothly, it is required to find out the ideal concentration of the antibody solution. Therefore, the viscosity of the solution in relation to the concentration of the antibody must be determined.
With the EMS Viscometer such studies are easy to perform, even if only 300 µL of the antibody solution are available: The same sample can be used to measure the viscosity of the entire dilution series.
Protein concentration-dependent viscosity change using various buffer solutions. It is possible to quantitatively measure conformational change of protein molecule and change of intermolecular interaction due to change of salt type and pH as change of viscosity.
Viscosity is an important physical property of any adhesive. With normal viscometers, however, viscosity measurements of adhesives require a vast amount of time as cleaning is difficult or nearly impossible.
The disposable measuring cell of the EMS Viscometer brings decisive time savings to such measurements as cleaning is no longer necessary.
Ionic liquids (IL) are salts in a liquid state. They are often used in electric batteries. For this application, the viscosity of the ionic liquid should be as low as possible, as the ability of the ionic liquid to transport charge is the better the lower its viscosity. An ionic liquid suitable to be used in electric batteries must therefore have a low viscosity over a wide temperature range. Few ionic liquids remain liquid at extremely low temperatures and in many cases their viscosities become prohibitively high for electrochemical applications. Often, mixtures of different ionic liquids or the use of additives helps to mitigate this problem.
When developing a new ionic liquid, normally only small amounts of the product are available to perform viscosity measurements at different temperatures and to examine the influence of additives or the addition of another ionic liquid on its viscosity.
The EMS Viscometer is the ideal tool to perform such studies:
It requires only a small amount of sample to perform the measurements and can automatically measure the viscosity over a wide temperature range. Furthermore, the same sample can be used to perform measurements with different amounts of a certain additive or another ionic liquid added to check the influence of these additions on the sample's viscosity.
Liquids to Capture Carbon Dioxide:
Liquids which are able to capture large amounts of carbon dioxide might help to reduce CO2 emissions in future. Often ionic liquids are considered for this application, as they have almost no vapour pressure and do therefore not evaporate even under high temperature. When developing ionic liquids for this application, it is important to know how the viscosity of the ionic liquid is influenced by the absorbed carbonic acid.
With the EMS Viscometer the corresponding measurements can be carried out quickly and accurately as its measuring cell can be pressurized.
Luminophores are applied as thin emissive electroluminescent layers in display technology. To ensure a flawless application of a thin layer of the organic semiconductor, the viscosity of the material must exactly be known. The synthesis of new luminescent materials is normally complicate and expensive. To carry out several test normally only a minute amount of sample is available.
With the EMS Viscometer it is possible to determine the viscosity of luminescent materials with a very small amount of sample and there is no risk that the samples get contaminated during measurement. One sample can therefore be used for several tests without any problem.