The focus of Fraunhofer ISC is on the synthesis of nanomaterials via solution-based chemical nanotechnology (sol-gel method) see figure left.
This technique is used for the production of inorganic nanostructures and inorganic-organic hybrid polymers ORMOCER®s. Beside hybrid polymers, particle technologies are another major focus at ISC (https://www.partikel.fraunhofer.de/en.html).
Offered are support for processing and upscaling of particles and particle based materials (composites and coatings) up to technical scale / pilot level. One highlight is the semi-continuous centrifugation equipment for nanoparticle separation. ISC also works on the combination of functional nano-units to complex multifunctional particles, called supraparticles, which can achieve new properties e.g. by incorporating optical and magnetic functions in suprastructures. Furthermore, additives can be synthesized which can be easily dispersed in polymer matrices due to programmable particle functionalization. Particle developments at ISC find appliction in waste water treatment, as filler in polymers, in battery materials and in biomedicine.
ORMOCER®s as nanoscale hybrid materials
ORMOCER®s are hybrid polymer materials that are synthesized by the sol-gel process combining inorganic and organic structural units on nano- and molecular scale. Initially, a nanoscale inorganic network is built by controlled hydrolysis and condensation of organically modified Si alkoxides. A co-condensation with other metal alkoxides (Ti, Zr, Al alkoxides) is also possible.
In a subsequent step, the polymerizable groups, as part on the inorganic network, are crosslinked by means of thermal or UV curing. In addition, organically modified Si alkoxides can be used, which do not undergo organic polymerization reactions and thus contribute to an organic functionalization of the inorganic network. Applications of these hybrid materials are widespread, from surface refinement to optical, electronic, biomedical and dental applications, see also www.isc.fraunhofer.de/en/fields-of-activity/materials/ormocer.html .
Contact: Dr. Carsten Gellermann