Research Area

Surface Technology

Sol-Gel Technology

In addition to flame treatment and plasma processes, sol-gel technology is another important part of the atmospheric pressure based coating processes at INNOVENT.

Depending on the precursors used, non-metallic inorganic or hybrid polymer layers can be applied to various materials, such as: glass, metal, textiles, and plastics using a sol-gel process from colloidal dispersions. By embedding the smallest inorganic or organic particles in the layers, additional functionalities such as: scratch resistance, fluorescence properties or antibacterial effect can be achieved.

In addition to common coating processes such as dipping, spraying and doctoring, INNOVENT uses a laboratory coating plant for wet film application. This allows for a large-area, high-quality application of functional layers in the nanometer range on flat substrates, such as glass or flexible roll materials (e.g. films, textiles). The layers are applied by means of a slot nozzle or a spray application. A corona pretreatment is also possible for roll goods.


By combining sol-gel technology with various atmospheric pressure and vacuum-based processes, special functionalization and adhesive strength can be achieved. Thus, the long-term durability can be improved as well.

As a result of these various possibilities, a wide range of applications can be developed using sol-gel processes with regard to:

  • Protection against plagiarism
  • Corrosion protection layers
  • Barrier layers
  • Bactericidal layers
  • Photocatalytically active layers
  • High temperature resistant coatings
  • Layers to reduce adhesion
  • Scratch-resistant coatings


Current projects

  • Functional sol-gel coatings, for optimizing the demoulding behavior of moulded parts from injection moulds
  • Development of sol-gel systems, for the replication of micro- and nanostructures with improved properties
  • Investigation and optimization of the drying and curing behavior of sol-gel coatings on roll stock, by means of process combination
  • Method for objective evaluation of edge deletion
  • Surface adaptation for marine coatings using basalt flock
  • Bonding layers and active edge seals, for basalt fiber composite optical components


Completed projects

  • Antibacterial and anticorrosive easy-to-clean coatings, for glass surfaces in wet areas
  • Development of a coating technology, for the production of highly corrosion-resistant powder-coated 3D components made of steel and galvanized steel
  • Development of a transparent structurable plagiarism protection, on the basis of coatings containing fluorescent dyes and nanoparticles
  • EHOS - Functional sol-gel systems with release effect, for the coating of plastic processing tools
  • Plasma assisted photocatalytic water purification (PlaPhoWa)


Team Sol-Gel Technology

The sol-gel technology team combines the expertise of chemists, materials scientists and materials engineers.


Team Sol-Gel Technology

Marion Homuth

Surface Technology
Team Leader
Sol-Gel Technology

Phone: +49 3641 282551