SKM 2021 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 2: Hydrogels and Microgels

CPP 2.3: Vortrag

Montag, 27. September 2021, 14:15–14:30, H1

Co-polymerization of PNIPAM microgels with Dopamine Methacrylamide to increase adhesive properties — •Sandra Forg1, Alexandra Karbacher1, Regine von Klitzing1, Zhishuang Ye2, and Xuhong Guo21Soft Matter at Interfaces (SMI), Technical University of Darmstadt, Germany — 2School of Chemical Engineering, East China University of Science and Technology, China

Microgels are cross-linked polymer particles, which are highly swollen in solvents such as water. One of those microgels is the stimuli-responsive PNIPAM, which undergoes deswelling when heated above its LCST at 32°C. The co-polymerization of PNIPAM is a well-defined technique to design unique microgel systems.

Dopamine methacrylamide (DMA) is a catechol-based monomer, which is main responsible for the adhesive properties of marine organisms. Combining the stimuli-responsiveness of PNIPAM with the adhesive properties of DMA bears a huge potential for biomedicine.

In literature the formation mechanisms of such microgel networks are shown. Furthermore, it is well-known that such catechol-based monomers like DMA have a high radical scavenging ability and thus cross-link the microgel. But, so far, a detailed understanding of the co-polymerization is missing. Therefore, the reaction kinetics of DMA during the microgel synthesis are presented in this work. The built-in DMA was verified by UV-VIS standard addition and NMR spectroscopy. First adhesion tests under water will be presented.

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