Bioresistancy of building and finishing materials usually requires addition of dedicated bioactive chemicals, so-called biocides. The usual increase in biocide concentration only results in a minor prolongation of the material service-life. For example, coatings usually exhibit biocidal functionality between 0.5 and 2 years – depending on environmental loads –, whereas the desired service life in building practice is at least 10 years. This relatively short service life results in early replacement and a high impact on the environment. In this proposal we will therefore focus on extending the service-life of bio-active agents in finishing materials by the introduction of a ‘smart’ concept of bio-inhibitor release. This smart release mechanism will consists of an induced response on external stimuli. Our aim is to increase the activity of the bio-inhibitors with at least a factor of 5. Within this project we will focus on applying the concepts in several materials for construction such as paints and plasters for indoor use. The applied technologies will be selected based on their market impact and broad applications in other products for the construction sector.
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