BRAND-NEW
KRÜSS Added the Constrained SD Method to Its Measuring Portfolio KRÜSS expanded its portfolio of optical interface analysis with a special method for measuring surface tension at high temperatures.
K
RÜSS has recently announced that it has expanded its portfolio
an effective remedy: the measurements are fast, require no change to
of optical interface analysis with the Constrained Sessile Drop
the measurement setup and can be seamlessly integrated into daily
(Constrained SD) method, which allows the measurement of
quality routines.
surface tension by using a single sessile drop. This addition will allow to
As a single sample can be melted directly on the sample pedestal,
perform rapid purity checks of contact angle test liquids and analyses of
neither vessels nor high-temperature dosing units are required, so
molten materials at high temperatures.
operators do not need to carry out time-consuming preparations and
The Constrained SD technique observes how the opposing forces of
cleaning operations. In addition, the new Constrained SD technique
surface tension (SFT) and gravity affect the shape of a droplet: if the
added to KRÜSS’ portfolio of optical interface analysis works well under
density and dimensions of a dosed sessile drop are known, then the SFT
thermally isolated conditions, with the maximum temperature that can
can be calculated by image analysis of its contour.
be extended up to 2000° C using special sample platforms made of
Test liquids used for contact angle measurements are strongly
zirconium oxide in combination with a high-temperature measuring
influenced by even smallest amounts of surface-active impurities such
system.
as those left behind by rinsing agents, that could cause false results. Checking test liquid SFT using the Constrained SD method provides then
For further information: www.kruss-scientific.com © KRÜSS
Analysis of a Constrained Sessile Drop in the ADVANCE Software.
14
N. 75 - MAY/JUNE 2022 - international PAINT&COATING magazine
