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Polymer Brushes
Materials scientists, polymer chemists, surface physicists and materials engineers will find this book a complete and detailed treatise on the field of polymer brushes, their synthesis, characterization and manifold applications. In a first section, the various synthetic pathways and different surface materials are introduced and explained, followed by a second section covering important aspects of characterization and analysis in both flat surfaces and particles. These specific surface initiated polymerization (SIP) systems such as linear polymers, homopolymers, block copolymers, and hyperbranched polymers are unique compared to previously reported systems by chemisorption or physisorption....
Polymer Sorption Phenomena
This book contains contributions of the 7th Dresden Polymer Discussion held in Mei?en near Dresden from April 19 to 22, 1999. The conference was dedicated to the field 'Characterization of polymer sorption phenomena: From solution to the surface'. Research in the area of modification and characterization of surfaces and interfaces of solids has been booming in the last few years, due to its enormous importance and potential for the development of novel technologies in materials research and engineering. Therefore the 7th Dresden Polymer Discussion, held from April 19 to 22, 1999, was dedicated to the field 'Characterization of polymer sorption phenomena: from solution to the surface'. The publication of the proceedings in this book may contribute to further progress in this field.
PnBA/PDMAA-based Iron-loaded Micropillars Allow for Discrete Cell Adhesion and Analysis of Actuation-related Molecular Responses
Abstract: A new approach to generate magneto-activatable microstructures for discrete cell adhesion to investigate cell mechanoresponsiveness is reported here. The system is based on poly(n-butylacrylate) micropillar arrays, generated from prepolymers via C,H insertion chemistry and filled with magnetic iron oxide nanoparticles. The pillars' surfaces are modified such that only top faces of the pillars are cell attractive, while the pillar side walls and the area between the pillars are covered by a cell repelling hydrogel layer based on poly(N,N-dimethyl acrylamide). Magnet stimulation leads to pillar deflection, which induces traction forces to adherent cells. Analysis of early mechanoresp...
Prevention of Ocular Tenon Adhesion to Sclera by a PDMAA Polymer to Improve Results After Glaucoma Surgery
Abstract: The authors describe a process that may eventually reduce the risk of scar formation after glaucoma surgery. For this, a thin hydrogel coating is photochemically generated and linked to the sclera surface at the surgical site. This coating is generated from a photoreactive prepolymer containing anthraquinone groups, which is administered as a thin pad to the sclera surface. Short UV irradiation leads to a reaction of the photogroups with neighboring chains via C-H insertion crosslinking, thus transforming the precursor polymer into a hydrogel. Simultaneously, a reaction between the photogroups and the underlying sclera tissue occurs, so that the hydrogel patch becomes covalently linked to the tissue. The authors show that the resulting thin coating is strongly cell repellent and hinders tenon fibroblasts to form tenon tissue at the site of the coating and is suitable for inclusion into a surgical procedure
Maskless Writing of Surface-attached Micro-magnets by Two-photon Crosslinking
Abstract: Surface-bound 3D micro-magnets are fabricated from photoreactive copolymers filled with magnetic nanoparticles by maskless 3D writing. The structures are generated by 2-photon crosslinking (2PC), which allows direct writing into solid films of composites consisting of magnetic particles and a photoreactive elastomer precursor. With this strategy, it is possible to directly write complex, surface-bound magnetic actuator structures, which generates new opportunities in the fields of microfluidics and bioanalytical systems. Compared to the common 2-photon polymerization, in which the writing process takes place in a liquid resin, the direct writing based on the 2PC method takes place in a solid polymer film (i.e., in the glassy state)
