Functionalization of Semi-Finished Parts by Printed Interdigital Structures for Cure Monitoring of Adhesive Joints

We present a cost-efficient screen printed sensor for online cure monitoring of adhesives on semi-finished parts. It can be manufactured and used directly in the production line. A printed interdigital sensor is used for this purpose. We investigate the influence of environmental condition and modified adhesive properties on the sensor's signal. The sensor can successfully detect insufficient curing, for example, due to excessive humidity or improper mixing ratio of binder and hardener. Therefore, our sensor will enable a cost-effective automated control of the curing of adhesives in the production lines of the factories of the future.