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Authors
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Hagmann, K.; Schneider, C.; Ihmann, S.; Böhme, F.; Klitzing, R. v.
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Title
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Exploring structure-property relationship on a nanoscale for tailoring films of amphiphilic polymer co-networks
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Date
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26.05.2026
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Number
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0
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Abstract
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Amphiphilic polymer co-networks (APCNs) provide a large toolbox for tuning coatings important for applications such as bio-interfaces. Therefore, we investigate the influence of network composition and environmental conditions on the structure and mechanical and adhesive properties of thin films composed of hydrophobic tetra-PCL and hydrophilic tetra-PEG stars of varying sizes. State-of-the-art atomic force microscopy (AFM) techniques, including phase imaging, fast quantitative static indentation, and dynamic indentation, provide insights into the structure-property-relationship on various length scales. PEG-rich networks exhibit amorphous morphologies with spherical nanodomains and elastic moduli of a few MPa, while PCL-rich networks form semicrystalline cylindrical arrangements with moduli up to several hundred MPa in water. Temperature-dependent measurements in water revealed a strong hysteresis of elastic moduli while shifting the melting/crystallization transitions or preventing crystallization in PEG-rich networks. All networks displayed predominantly elastic behavior. Co-networks in non-selective solvent conditions are overall softer, less adhesive, and structurally more homogeneous. These results establish a predictable correlation of network composition, physical and chemical environment, structure, and properties, which makes them suitable for a rational design of amphiphilic systems for various applications.
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Publisher
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Wiley
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Wikidata
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Citation
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Macromolecular Chemistry and Physics 227 (2026) e00500
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DOI
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https://doi.org/10.1002/macp.202500500
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