Abstract
This work reports the activation of polyurethane film surfaces in order to enrich them with polar groups such as -NH2, -OH, -COOH or radicals, which further allows immobilization of several bioactive compounds. UV-activation was used to introduce new groups on the polymer surface without affecting the bulk properties. The current arising species improve the wettability of the PU surfaces as it was observed from the static contact angle measurements. The structure and composition of the new PU surfaces were analyzed by using ATR-FTIR spectroscopy. The results suggested the possibility of modifying the PU surfaces in a shorter time periods, in order to provide many sites to attach other biomacromolecules by polar interaction or hydrogen bonding.
Highlights
This work reports the activation of polyurethane film surfaces in order to enrich them with polar groups such aasct-iNvaHti2o, -nOwHa, s-CuOseOdHtoorinratrdoidcualcse, which further allows immobilization new groups on the polymer surface of several bioactive compounds
The current arising species improve the wettability of the PU surfaces as it was observed from the static contact angle measurements
The results suggested the possibility of modifying the PU surfaces in a shorter time periods, in order to provide many sites to attach other biomacromolecules by polar interaction or hydrogen bonding
Summary
This work reports the activation of polyurethane film surfaces in order to enrich them with polar groups such aasct-iNvaHti2o, -nOwHa, s-CuOseOdHtoorinratrdoidcualcse, which further allows immobilization new groups on the polymer surface of several bioactive compounds. Polyurethanes (PUs) are one of the most versatile and promising families of polymers because they can be prepared from a wide variety of materials with different properties leading to a high variety of applications. They offer the possibility to tailor the final properties through the variation in the compositions by changing the ratio of soft and hard segments. Surface modification of polymers aims to tailor the surface characteristics of the material for a specific application without affecting the bulk properties. Several physical and chemical techniques have been developed to improve the surface wetting, leading to blood compatibility or cellular adhesion [8, 9]. These methods involve surface modification and further grafting a hydrophilic component, such as poly(ethylene oxide) [11], 2hydroxyethylmethacrylate [12], peptides [13], or heparin [14]
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