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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 24: Poster Session I

CPP 24.2: Poster

Montag, 16. März 2020, 17:30–19:30, P3

Cross-scale characterization of the interaction of polymers on cellulose interfaces: Construction of a model surface of cellulose — •Cassia Lux, Thomas Tilger, Olaf Soltwedel, and Regine von Klitzing — Department of Physics, Technische Universität Darmstadt, Darmstadt, 64289, Germany

As a functional material, cellulose based paper has a high importance in a variety of sectors, such as packaging, print media and speciality papers. This is especially crucial with regard to reducing plastic use and waste and replacing it with renewable and biodegradable resources.

The interactions of cellulose fibers with functional additives, such as the wet-strength increasing polymer PDADMAC, have been investigated in the past with respect to the mechanical properties of the resulting paper. Yet, a systematic understanding of the effects of the chemistry and structure of the polymer on the properties of the fibers is still missing and would lead to an exhaustive knowledge of the functionalization of paper.

For a detailed examination, model surfaces are prepared by dip and spin coating from both soluble carboxymethyl cellulose (CMC) and suspended microcrystalline cellulose (MCC) under the variation of extrinsic conditions such as concentration and pH value of the polyelectrolyte solutions and deposition time. Ellipsometry and AFM measurements allow for a comprehensive investigation of the influence of these conditions on features like thickness and roughness of the synthesized films.