Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 32: Poster Session II
CPP 32.10: Poster
Dienstag, 13. März 2018, 14:00–16:00, Poster B
Expandable and though hydrogels for gel-embodied soft machines — •Robert Gerstmayr1, Moritz Strobel1, Daniela Wirthl2, Robert Pichler2, Florian Hartmann2, Sabine Hild1, Siegfried Bauer2, and Martin Kaltenbrunner2 — 1Institute of Polymer Science-JKU, Linz, Austria — 2Soft Matter Physics-JKU, Linz, Austria
Natural hydrogel hybrids inspired scientists to develop wide ranging classes of soft hydrogel-based electronic, ionic and photonic devices based on soft and soft-to-hard hybrid architectures. For these applications tough hydrogels have proven to be a superior material due to their high flexibility and adequate strength. The tough gels we produced are full simultaneous interpenetrating polymer double networks, physically interlaced and inseparable. The materials show an advanced flexibility introduced by the energy dissipating reload mechanism of the second network. To obtain a prominent level of complexity a combination of several materials is needed. Which is achieved by bonding several layers consisting of various materials. A challenging task is to overcome the low interfacial toughness when bonding diverse substances to water-rich hydrogels. Cyanoacrylate adhesives, which rapidly polymerize in the presence of hydroxyl groups of water mixed with branched alkanes, form an easy-to-use colloidal glue suspension with tailorable properties. Raman spectroscopy was used for the characterization of the bonding interface. The diffusion behaviour and the thickness of the resulting moisture curing cyanoacrylate adhesive layer were analysed. Cyclic tensile tests were performed to examine the Mullins effect.