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Attophotonics Biosciences GmbH
Viktor Kaplan
Strasse 2
2700 Wiener
Neustadt

Surface Technology & Tribology

Attophotonics offers expertise in paints, coatings and surface technology.

We develop customized paints and coatings for indoor and outdoor applications. We also perform corona treatments as well as a broad range of tests to characterize coatings and surfaces.

Lacquers

 

Attophotonics works with various lacquer systems, among them

  • two part epoxy coatings
  • baking finishes
  • ORCOMER coatings
  • transparent conducting layers
  • UV-coatings
  • polyaniline and polypyrrole coatings
  • ...

By blending with additives – e.g. polymers, waxes, nanoparticle dispersions – the lacquers are adapted in order to meet our customers’ demands.
The processibility of the modified lacquers is tested and optimized on in house printing lines and lacquering facilities (see also Lab Equipment).
A variety of instruments and standardized methods are employed to characterize mechanical and optical properties (see below: Tribology & Surface Analyses).

nanoverstärkte Lacke WEB

Nano-composite Lacquers By addition of nanoparticles the mechanical properties of e.g. lacquers (hardness, abrasion resistance, abrasion profile) can be improved without compromising color, brilliance or translucency.

Coatings

 

Attophotonics uses physical-chemical and wet chemical techniques e.g.

  • sputter coating
  • thermal flash evaporation
  • monolayer self-assembly
  • wet chemical deposition
  • spin coating
  • spray coating
  • dip coating

to create micro- or nano-coatings on various surfaces such as

  • polymer films,
  • molded parts,
  • metal surfaces,
  • glass,
  • sanitary ware,...

DSCF3919

Antibacterial films 2

Antibacterial Coatings Photo-catalytic (TiO2, WO3,…) or chemo-active (Ag & Cu) antibacterial coatings prevent or at least suppress colonization by microorganisms.

Lacquer & Coating Technology - Engineering

 

Also in the field of lacquer and coating technology we develop equipment for laboratory use or industrial applications e.g. sputter coaters, thermo-mixers, spray coating units or reactors for coating of pigments. See also Engineering.

DSCF3920

Corona Treatment

 

Corona treatment (also referred to as ‘plasma surface treatment’) is a surface modification technique with diverse applications. For instance, it may be used to reduce the surface hydrophobicity of plastics, paper and textiles or render foils less gas-permeable.

Background: An electrical high-voltage discharge at the corona unit induces chemical processes in the surface of the treated material leading to the formation of polar groups e.g.

  • with O2 --> C=O, OH, COOH, various metastable radicals
  • NH3 --> NH2
  • with N2 --> NH, NH2
  • with Ar --> chain breakage, radicals, followed by oxidation

In the corona unit of Attophotonics’ nano-printing-station films with a max. width of 30 cm and a length of up to 1 km can be treated.

1 kW corona film system 4

Tribology & Surface Analyses

 

Surface Characterization

To investigate the micro- and nanostructure of conducting as well as non-conducting surfaces we employ

  • atomic force microscopy (AFM)
  • scanning tunneling microscopy (STM)
  • transillumination microscopy, reflected-light microscopy and fluorescence microscopy

metallized polymer surface via STM

W on glass profil

(Paint) Adhesion Testing

via

  • cross-cut test (DIN 53151)
  • pull-off test (DIN EN 2409)
  • adhesion µ-profiling of surfaces for lamination or film coating

 

Corrosion Testing

The salt spray test (DIN 50021) is a standardized test to analyze corrosion resistance of (coated) samples.
The test is performed in-house in a 450 l test chamber. Samples may be treated with NaCl-solutions, diluted acidic acid or sulfur-containing solutions (not H2S!).
 

Korrosionstest Chromrohre

corrosion test chromium tubes

Multilayer Corrosion protection & testing

cross-cut test & corrosion test

Layer Thickness Testing

The thickness of coatings can be measured via

  • atomic force microscopy (AFM)
  • impedance measurements
  • interference measurements (in cooperation with the University of Applied Sciences Wiener Neustadt)