Durable, media-tight, single-material joints in medical diagnostics ("BioSeal")

The "BioSeal" project aims to develop suitable bioplastics that meet medical, environmental and economic requirements in laboratory diagnostics. The objective is to develop formulations suitable for both flexible films and rigid substrates, offering a range of properties, such as transparency, mechanical strength and wettability. These are then to be used for the development of fluid-tight joints, such as those required in microfluidic diagnostic chips (lab-on-a-chip). For this process, a substrate with a fine channel structure is used, which directs a test fluid between different mixing or reaction zones. For capillary flow, it is essential that the channel is manufactured with precision within a narrow geometric tolerance range and is bounded at the top by a (partially) transparent cover layer. The use of recyclable, biogenic and biodegradable monomaterial composites offers broad application potential, particularly for single-use medical diagnostics. 

As part of the project, Exipnos GmbH is involved in the selection and modification of suitable bioplastics and is investigating and optimising their suitability in terms of structural replication, transparency and biocompatibility for various moulding processes. Complementarily, HTWD is developing test setups for the application-oriented bonding and characterisation of media-tight composite systems. 

Start: 01/04/2026

End: 30 March 2028

Prof. Dr.-Ing. Marc-Peter Schmidt

• Z 435
• +49 351 462 2504
• Email

M.Eng. Oksana Tovmachenko

• A 302
• +49 351 462 2309
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Dipl.-Ing. Matthieu Fischer

• A 219
• +49 351 462 2347
• Email