Adhesion properties of phosphate- and siloxane-containing polyurethane dispersions to steel: An analysis of the metal-coating interface

2003 ◽  
Vol 88 (4) ◽  
pp. 900-907 ◽  
Author(s):  
K. Mequanint ◽  
R. Sanderson ◽  
H. Pasch
Keyword(s):  
Metal Coating ◽  
Adhesion Properties ◽  
Polyurethane Dispersions

Phosphonic Acid-Functionalized Polyurethane Dispersions with Improved Adhesion Properties

2015 ◽  
Vol 7 (44) ◽  
pp. 24641-24648 ◽  
Author(s):  
Laura Breucker ◽  
Katharina Landfester ◽  
Andreas Taden
Keyword(s):  
Phosphonic Acid ◽  
Adhesion Properties ◽  
Polyurethane Dispersions

scholarly journals Microstructural and Compositional Characterisation of Chromate Pretreatment on Aluminium

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
M. Oki
Keyword(s):  
Conversion Coating ◽  
Coating Material ◽  
Metal Coating ◽  
Linear Features ◽  
Adhesion Properties ◽  
Particulate Materials ◽  
Chromate Conversion Coating ◽  
Underlying Substrate

Chromate conversion coating developed on aluminium has been examined using SEM/EDX and CTEM/EDX with a view to having further knowledge of its intrinsic surface, plan, and sectional morphologies which will aid the understanding of their roles in improved corrosion and adhesion properties of the underlying substrate. The surface consists of spherical clusters of particulate materials. The sections, however, reveal approximately parallel, linear features which terminate at or close to the metal/coating interface, while plan views show cell-like particulate features. The coating is composed of chromium and aluminium compounds, both, probably hydrated. For a conversion coating to fully replace its chromate counterpart, most of these features may have to be replicated in the nonchromium coating material which should contain nontoxic, leachable corrosion inhibiting species.

scholarly journals Structure and adhesion properties before and after hydrolytic ageing of polyurethane urea adhesives made with mixtures of waterborne polyurethane dispersions

2018 ◽  
Vol 85 ◽  
pp. 165-176 ◽  
Author(s):  
Mónica Fuensanta ◽  
José Antonio Jofre-Reche ◽  
Francisco Rodríguez-Llansola ◽  
Víctor Costa ◽  
José Miguel Martín-Martínez
Keyword(s):  
Waterborne Polyurethane ◽  
Adhesion Properties ◽  
Before And After ◽  
Polyurethane Dispersions

Ultra high resolution SEM at high voltage images individual fab fragments applied as molecular label to cell surface receptors

1989 ◽  
Vol 47 ◽  
pp. 70-71
Author(s):  
Klaus-Ruediger Peters
Keyword(s):  
High Resolution ◽  
High Energy ◽  
Metal Coating ◽  
Beam Diameter ◽  
Surface Receptors ◽  
Surface Mobility ◽  
Metal Atoms ◽  
Shadowing Effect ◽  
Imaging Mode ◽  
Deposition Techniques

Topographic ultra high resolution can now routinely be established on bulk samples in cold field emission scanning electron microscopy with a second generation of microscopes (FSEM) designed to provide 0.5 nm probe diameters. If such small probes are used for high magnification imaging, topographic contrast is so high that remarkably fine details can be imaged on 2DMSO/osmium-impregnated specimens at ribosome surfaces even without a metal coating. On TCH/osmium-impregnated specimens topographic resolution can be increased further if the SE-I imaging mode is applied. This requires that beam diameter and metal coating thickness be made smaller than the SE range of ~1 nm and background signal contributions be reduced. Subnanometer small probes can be obtained (only) at high accelerating voltages. Subnanometer thin continuous metal films can be produced under the following conditions: self-shadowing effect between metal atoms must be reduced through appropriate deposition techniques and surface mobility of metal atoms must be diminished through high energy sputtering and/or specimen cooling.

High-resolution scanning electron microscopy in biology

1990 ◽  
Vol 48 (3) ◽  
pp. 14-15
Author(s):  
Keiichi Tanaka
Keyword(s):  
High Resolution ◽  
Immunoglobulin M ◽  
Metal Coating ◽  
Biological Macromolecules ◽  
Ultrahigh Resolution ◽  
Preparation Methods ◽  
Low Contrast ◽  
Almost All ◽  
Charging Effect ◽  
Scanning Electron

With the development of scanning electron microscope (SEM) with ultrahigh resolution, SEM became to play an important role in not only cytology but also molecular biology. However, the preparation methods observing tiny specimens with such high resolution SEM are not yet established.Although SEM specimens are usually coated with metals for getting electrical conductivity, it is desirable to avoid the metal coating for high resolution SEM, because the coating seriously affects resolution at this level, unless special coating techniques are used. For avoiding charging effect without metal coating, we previously reported a method in which polished carbon plates were used as substrate. In the case almost all incident electrons penetrate through the specimens and do not accumulate in them, when the specimens are smaller than 10nm. By this technique some biological macromolecules including ribosomes, ferritin, immunoglobulin G were clearly observed.Unfortunately some other molecules such as apoferritin, thyroglobulin and immunoglobulin M were difficult to be observed only by the method, because they had very low contrast and were easily damaged by electron beam.

A metal- coating Chamber for High-Resolution Cryo-SEM

1990 ◽  
Vol 48 (1) ◽  
pp. 418-419
Author(s):  
John G. Sheehan
Keyword(s):  
High Resolution ◽  
Colloidal Suspensions ◽  
Metal Coating ◽  
Colloidal Interactions ◽  
Amorphous Ice ◽  
High Vapor ◽  
Particulate Coatings ◽  
20 Nm ◽  
Film Nucleation ◽  
Coating Chamber

Improvements in particulate coatings for printable paper require understanding mechanisms of colloidal interactions in paper coating suspensions. One way to deduce colloidal interactions is to mage particle spacings and orientations at high resolution with cryo-SEM. Recent improvements in cryo-SEM technique have increased resolution enough to image particles in coating paints,vhich are sometimes smaller than 100 nm. In this report, a metal-coating chamber is described for preparation of colloidal suspensions for cryo-SEM at resolution down to 20 nm. It was found that etching is not necessary to achieve this resolution.A 120 K cryo-SEM sample will remain in an SEM for hours without noticeable condensation of imorphous ice. This is due to the high vapor pressure of vapor-condensed amorphous ice, measured by Kouchi. However, clean vacuum is required to coat samples with the thinnest possible continuous metal films which are required for high magnification SEM. Vapor contaminants, especially hrydrocarbons, are known to interfere with thin-film nucleation and growth so that more metal is needed to form continuous films, and resolution is decreased. That is why the metal-coating chamber in fig. 1 is designed for the cleanest possible vacuum. Feedthroughs for the manipulator md the shutter, which are operated during metal coating, are sealed with leak-proof stainless-steel Dellows. The transfer rod slides through a baseplate feedthrough that is double o-ring sealed.

Anti-Adhesion Properties of Cranberry Products: Current Status and New Directions

Planta Medica ◽  
2013 ◽  
Vol 79 (10) ◽  
Author(s):  
CM Coleman ◽  
KM Auker ◽  
D Ferreira
Keyword(s):  
Current Status ◽  
Adhesion Properties ◽  
New Directions

Effect of Plasma Surface Treatment on Surface Energy and Adhesion Properties for Cr Coating on Substrates

2013 ◽  
Vol 51 (10) ◽  
pp. 735-741
Author(s):  
Dong-Yong Kim ◽  
Eun-Wook Jeong ◽  
Kwun Nam Hui ◽  
Youngson Choe ◽  
Jung-Ho Han ◽  
...  
Keyword(s):  
Surface Energy ◽  
Surface Treatment ◽  
Adhesion Properties ◽  
Plasma Surface ◽  
Plasma Surface Treatment ◽  
Cr Coating

INFLUENCE OF SILICA FILLER ON COHESION-ADHESION PROPERTIES OF NANOSTRUCTURIZED POLYMER-POLYMER SYSTEMS

2020 ◽  
Vol 42 (1) ◽  
pp. 11-18
Author(s):  
T.L. MALYSHEVA ◽  
◽  
A.L. TOLSTOV ◽  
E.V. GRES ◽  
◽  
...  
Keyword(s):  
Adhesion Properties ◽  
Polymer Systems ◽  
Silica Filler
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