Surface Science Blog

How To Measure Surface Free Energy?

Posted by Susanna Laurén on April 6, 2017

If you have been looking for an instrument for contact angle measurement, you have probably noticed that measuring contact angle is not always enough. Although contact angle measurement does give you an indication on the wetting properties of the surface, it is always a value that depends on the measurement liquid used.

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Topics: Surface Free Energy, Contact Angle

How to measure dynamic contact angles on superhydrophobic surfaces

Posted by Susanna Laurén on January 17, 2017

Superhydrophobic surfaces are gaining more and more attention as new applications for them arises. For surface to be superhydrophobic, it has to fulfil two requirements. The static contact angle has to be over 150 degrees but in addition to that, the surface has to have a low contact angle hysteresis. For this reason, measurement of dynamic contact angles is especially important when superhydrophobic surfaces are studied.

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Topics: Contact Angle, superhydrophobic surfaces

Advances in Wettability Analysis for Superhydrophobic Surfaces

Posted by Maiju Pöysti on May 12, 2016

Superhydrophobic surfaces toward real-world applications


 

 

Soft Matter and Wetting research group at Aalto University published insights about superhydrophobic surfaces in Science recently1. The non-wetting surfaces have experienced an enormous boost of interest after the observation of superhydrophobicity and self-cleaning effect in natural lotus leaves.

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Topics: Contact Angle, superhydrophobic surfaces

Evaluate the influence of surface roughness on wettability

Posted by Matthew Dixon on April 13, 2016

While contact angle (CA) goniometry involving placing a drop of liquid on a surface and measuring the resulting angle has been around for many years, we have only recently developed a system to account for the underlying surface’s micro-scale roughness.

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Topics: Wettability, Adhesion, Contact Angle

Wettability analysis for Inkjet Printing

Posted by Maiju Pöysti on April 4, 2016

Surface tension of inkjet inks and the wettability of the printing substrate are important factors influencing the final printing quality and process reliability. Surface tension and interfacial interactions can be explored with various tensiometry technologies: Equilibrium and dynamic surface tension measurements can be utilized in ink formulation and development.

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Topics: Wettability, Contact Angle

How to study adhesion to wood-plastic composites

Posted by Gunilla Rydén on September 25, 2015

 

Wood-plastic composites are relatively new materials as they started to emerge at the beginning of the 90’s. The most widespread use of WCPs is in outdoor decking but it is also used in railings and siding as well as park benches and indoor furniture. Wood-plastic composites (WPCs) are composed of three main ingredients: recycled thermoplastics (such as polyethylene, polypropylene and polyvinyl chloride), wood filler and additives.

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Topics: Surface Roughness, Adhesion, Contact Angle

6 Reasons to Measure Wettability in Paper and Board Quality Control

Posted by Anna Oom on June 11, 2015

 

The parameters that are being measured in quality control of paper and board may differ for several reasons; what applications the paper is made for, available instrumentation, traditions etc. If you haven’t thought about measuring wettability and adhesion properties of your paper, here are 6 reasons to start doing so.
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Topics: Quality Control, Wettability, Surface Roughness, Paper and Board, Contact Angle