Abstract:
Biofilms constitute major problems in health care and industry where they can colonize catheters or plug pipes. In this thesis, various material properties of biofilms formed by two Bacillus subtilis strains were compared. It was shown that the material properties of biofilms can be altered by different chemicals, and specific biofilm matrix components were found to be responsible for this alteration. Furthermore, a customized stretching-setup was constructed to investigate the tensile strength of in situ grown biofilms. Finally, a biofilm/mortar hybrid material with increased wetting resistance and delayed capillary water uptake was developed and characterized.