To view this newsletter in a browser, please click here.
KRÜSS Logo
Surface Science Newsletter – Issue 50
Reliably determining roughness: polished surfaces in 3D

Reliably determining roughness: polished surfaces in 3D

The roughness of a surface determines many mechanical properties such as friction or flow resistance and influences not only corrosion but also wettability and adhesion. The ISO 4288 and 25178 standards propose various test methods for roughness, the most important of which is optical three-dimensional roughness analysis by means of a confocal microscope. Using a polishing procedure as an example, we show you how you can use confocal microscopy to quickly and reliably correlate roughness with process parameters and thus optimize material processing.
More information
Product
Watching out for precision printing

Watching out for precision printing

High quality inkjet printing makes the perfect interplay between printing head control and the ink indispensable. We have developed the Drop Shape Analyzer – DSA Inkjet to support you in reaching this goal. The instrument incorporates an innovative optical system for analyzing the jet stream of ink droplets produced by the print head. Drop formation and analysis are exactly synchronized by triggering drop generation.
More information

Bath control with direct display of surfactant concentration
Bath control with direct display of surfactant concentration

Monitoring the surfactant content is an important step in the quality assurance of coating and cleaning baths. The Bubble Pressure Tensiometer – BPT Mobile used for this purpose now displays the determined concentration directly and without the need for an external reference curve. With this new function, the instrument solves the task of bath monitoring particularly efficiently.

More information
Confirm the precision of your interfacial tension results
Confirm the precision of your interfacial tension results

The Spinning Drop Tensiometer – SDT measures the interfacial tension (IFT) in a particularly wide range of values. The accuracy of the measurement depends above all on the precise determination of the droplet diameter, as this is included in the calculation of the IFT with the third power in the spinning drop method. You can now assess the quality of the results and estimate the measurement uncertainty with our new CP1611C standard for calibrating the diameter determination.

More information
Application
Read our study about the jetting behavior of inks
Read our study about the jetting behavior of inks

Our scientists have used the new Drop Shape Analyzer – DSA Inkjet to illustrate basic relationships between the waveform applied to an inkjet nozzle and the resulting jetting behavior of different model liquids. View the results in our Application Report and read how the instrument is able to analyze ink drops in flight.

More information
Beyond the surface
Pharmaceutical super surfactants from a fungus

Pharmaceutical super surfactants from a fungus
Some call it simply "mold", but for others it is a supplier of useful natural substances: the soil fungus Mortierella alpina. As a kind of biofactory, this organism produces long-chain fatty acids, which also serve as food supplements. Scientists from Jena (Germany) have now discovered that the fungus also forms a new class of surfactants called malpinins. These substances even outperform highly effective synthetic surfactants such as sodium dodecyl sulfate (SDS) – which is extremely rare with biogenic surfactants. The researchers see application potential for malpinins mainly in pharmaceuticals, where they could transport active substances through the lipid structure of cell walls. The new substance class is particularly suitable for this purpose because it is effective even at very low concentrations. In addition, no dissolution of red blood cells (haemolysis) or damage to cell walls could be detected – a side effect that otherwise frequently occurs with pharmaceutical surfactants.
Saving energy drop by drop in cooling technology
Saving energy drop by drop in cooling technology
Two percent less energy input for cooling thanks to a new type of coating – for refrigeration engineers, who often fight for every tenth of a percent, this sounds unbelievable. A research team at the Massachusetts Institute of Technology (MIT) is nevertheless convinced that this goal can be achieved for systems using non-aqueous cooling liquids. According to the scientists, the lower efficiency compared to water-based cooling systems is partly due to the low surface tension of the liquids. Instead of forming drops and flowing off in the heat exchanger after condensation, they wet the surfaces and form an insulating film. The coating developed at MIT prevents wetting and thus ensures the desired droplet formation. The coating is also thin enough not to be thermally insulating itself.
Video
Secure regular upgrades with the ADVANCE Software Assurance

Secure regular upgrades with the ADVANCE Software Assurance

ADVANCE is our innovative, workflow-oriented, and ever-growing software platform for a wide range of our instruments. Watch our video and learn about basic feature as well as the benefits you gain with permanently up-to-date software. The Software Assurance license model for ADVANCE is the cost-effective way to secure regular upgrades with new features that support you even more in your measurements and their evaluation.
Watch video
Seminars
Our seminar selection in November

Our seminar selection in November

Learn how to improve your products and processes with interfacial science! In the second half of the year you can deepen your knowledge in the following seminars in Hamburg:

We would be happy to welcome you at one of the events.
Certificate course for MSA and Liquid Needle users
Certificate course for MSA and Liquid Needle users
You, as a user of our instruments with your practical applications, are the center of attention in our Certificate course for MSA and Liquid Needle users. Register now and become a professional tester of wetting and surface free energy.

We would like to invite you to our Applications & Science Center in Hamburg on November 19, 2019.

Course registration
Secure yourself a place for our seminar on adhesion with Dr. Kash Mittal

Secure yourself a place for our seminar on adhesion with Dr. Kash Mittal

In spring 2020 our focus seminar Course on Adhesion Science and Technology with adhesion expert Dr. Kash Mittal will take place again.

We are very glad to invite you to our Applications & Science Center in Hamburg from March 24 - 25, 2020.
Seminar registration
Practical course for inkjet characterization
Practical course for inkjet characterization
In cooperation with Malvern Analytical, we will be holding a practical 4-day course around characterization methods for inkjet printing. Instructive talks and practical sessions will provide you with valuable information about inks and substrates in order to optimize ink formulations and printing processes.

We would be happy to meet you in our Applications & Science Center in Hamburg from April 21 to 24, 2020.
Course registration
Exhibitions and talks
Meet us at international conferences and exhibitions

Meet us at international conferences and exhibitions

We look forward to demonstrating our innovative technology in the field of interfacial analysis and meeting you at the following events:

  • parts2clean
    October 22 - 24 | Stuttgart, Germany
    Hall 7, Booth D14
  • SEPAWA
    October 23 - 25 | Berlin, Germany
    Booth D619
  • BCEIA
    October 23 - 26 | Beijing, China
    Hall E3, Booth 32090
  • The IJC
    October 29 - 30 | Düsseldorf, Germany
    Booth B13
  • InPrint Munich
    November 12 - 14 | Munich, Germany
    Hall A6, Booth 647
  • ChinaCoat
    November 18 - 20 | Shanghai, China
  • C-Touch & Display Shenzhen 
    November 21 - 23 | Shenzhen, China
    Hall 1, Booth 1E06
Check out our events page to find out about all the fairs and conferences we will be attending in the coming months.

Don't miss any of our talks

Don't miss any of our talks

Take the chance and visit our talks at the next international events and exhibitions:

  • parts2clean | Stuttgart, Germany |
    October 24, 10:40 am | Hall 9, Booth D29 |
    T. Skrivanek: "Simple monitoring of cleaning bath composition"
  • SEPAWA | Berlin, Germany |
    October 24, 9:30 am | Convention Hall I A |
    G. Velasquez, INCI-Experts: "The influence of thickener agents in different surfactant systems on foaming behavior and foam structure"
  • The IJC | Düsseldorf, Germany |
    October 30, 3:30 pm | Track 2
    T. Willers: "What are the important physico-chemical parameters when formulating inks and how to charaterise and optimise them"