Biodegradable parylene coatings
Surface modification with parylene coatings opens up new uses
Exhibitors
Location
Hall 11, Stand B06
Description
Coatings made of poly-p-xylylene (parylene) have become established in medical technology, but also in other areas such as electrical engineering. Solvent-based coating techniques, such as dip or spin coating, reach their limits in the biomedical field, as wetting problems and thus uneven layers or defects can occur with complex geometries. Therefore, in order to produce homogeneous permanent coatings, chemical vapor deposition (CVD polymerization) of parylene has become established, which is characterized by superior gap mobility. In this process, the starting molecules (precursors) are first sublimed in a vacuum system, pyrolyzed at high temperature and finally deposited on the desired object, on which they then react to form a solid polymer layer. Due to the nature of the process, no solvents are required and it is therefore particularly advantageous for coating sensitive materials. Researchers at the Institute for Functional Interfaces (IFG) at KIT have succeeded for the first time in producing a new class of degradable parylene coatings by CVD polymerization. For this purpose, the researchers introduce a special co-monomer (cyclic ketene acetal) into the process, whereby degradable carboxylic acid groups are incorporated into the polymer chains. The rate of degradation can be regulated via the composition and is accelerated by hydrophilic groups, for example. Biomolecules or drugs can be attached via additional functional side groups. The coatings produced in this way combine the attractive properties of degradability and chemical functionalization. Degradable properties pave the way for even broader applicability of parylene coatings, e.g. in regenerative medicine as temporary biomedical coatings for resorbable implants.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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