~ 2 min

Which surface free energy method should be used?

You might find it confusing when seeing all the different methods for surface free energy calculations. As surface free energy can give you more information on your surface compared to the contact angle measurements alone, it is time well spent to study the different theories more in detailed.

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~ 2 min

Assess the cleaning efficiency as a function of detergent concentration within an hour

What is the optimal surfactant concentration to use in a cleaning formulation? Here we show how the cleaning efficiency as a function of detergent concentration can be assessed within an hour.

~ 5 min

Effect of solid wettability on oil displacement and liberation from host rock in water

Unconventional oils, such as heavy oil, extra heavy oil, and bitumen, normally exist tightly on host solids such as rocks, sands and clay minerals. Successful liberation of unconventional oil from solids is essential for effective recovery.

~ 3 min

How to measure polymer brush swelling and collapse

Polymer brushes, polyelectrolyte multilayers and hydrogels are typically used to achieve desirable properties. Key parameters influencing these properties are layer conformation and the degree of hydration. Here we show a straightforward way to measure polymer brush swelling and collapse.

> 1 min

How to check the transformer oil quality based on ASTM D971 and IEC 62961 standards?

Regular inspection of the transformer oil quality is important to ensure the operation of the transformer. Several methods are available, but the newly released IEC 62691 standard is based on the interfacial tension measurement between water and the transformer oil.

< 3 min

Six measurement techniques for nanoparticle size characterization

Nanoparticle size is one of the key parameters that are relevant to characterize in nanoparticle suspensions. Here we list six different methods that you can use to characterize the nanoparticle size.

> 2 min

Why is wettability important in enhanced oil recovery?

In enhanced oil recovery wettability plays an important role as that determines the interactions between the solid (rock) and the liquids in the reservoirs (crude oil, brine). Wettability has been recognized as one of the key parameters controlling the remaining oil-in-place.

~ 3 min

How much protein adsorbs to glass and plastics?

Proteins tend to passively adsorb to surfaces. The amount adsorbed depends on many factors such as the protein itself, the ambient conditions and the surface material. So how can the adsorbed amount at these various conditions be assessed? Here we show how protein adsorption can be quickly measured.

~ 3 min

What is wettability?

Wettability is the preference of a liquid to be in contact with a solid surrounded by another fluid (liquid or gas). Depending on the application, wettability can be wanted or not.

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