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Author: Kim, Yongkyum × Author: Schulze, Agnes × Type: Text × Publisher: Basel : MDPI × Subject: Enzyme immobilization × WGL Institute: IOM ×

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    Bio-Inspired Polymer Membrane Surface Cleaning
    (Basel : MDPI, 2017-3-9) Schulze, Agnes; Breite, Daniel; Kim, Yongkyum; Schmidt, Martin; Thomas, Isabell; Went, Marco; Fischer, Kristina; Prager, Andrea
    To generate polyethersulfone membranes with a biocatalytically active surface, pancreatin was covalently immobilized. Pancreatin is a mixture of digestive enzymes such as protease, lipase, and amylase. The resulting membranes exhibit self-cleaning properties after “switching on” the respective enzyme by adjusting pH and temperature. Thus, the membrane surface can actively degrade a fouling layer on its surface and regain initial permeability. Fouling tests with solutions of protein, oil, and mixtures of both, were performed, and the membrane’s ability to self-clean the fouled surface was characterized. Membrane characterization was conducted by investigation of the immobilized enzyme concentration, enzyme activity, water permeation flux, fouling tests, porosimetry, X-ray photoelectron spectroscopy, and scanning electron microscopy.