Berlin 2024 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Charged Soft Matter, Polyelectrolytes and Ionic Liquids II

CPP 30.9: Vortrag

Mittwoch, 20. März 2024, 17:15–17:30, H 0107

From cellulose model surfaces to novel paper materials — •Cassia Lux, Leonie Beer, and Regine von Klitzing — Department of Physics, Technische Universität Darmstadt, Darmstadt, 64289, Germany

Paper is a hierarchical material based on cellulose, which allows functionalization on different length scales. The resulting multilateral use is especially crucial with regard to reducing plastic use and waste and replacing it with renewable and biodegradable resources. The functionalization of paper with stimuli-responsive microgels enables the preparation of biosensors or paper with new mechanical properties, such as higher flexibility. In order to study the particle adsorption, planar cellulose model surfaces are prepared to mimic the surface of a cellulose fiber. The impact of the charge and crosslinker content of the positively charged PNIPAM microgels on the adsorption to the negatively charged cellulose surface is studied. The question we address is how the properties of the particles affect the contact area between both and what impact this has on the adhesion. The structure of the particles and the force required to move the particles are studied by (peak force) AFM.

Keywords: cellulose model surface; microgels; adhesion