Ionic Effect on the Kinetic Transition in Ionic/Thermo-Responsive Hybrid Hydrogel Films Monitored by In-Situ Neutron Reflectivity
Due to the collapse of thermo-responsive polymer chains above the transition temperature (TT), a more porous structure can be formed, which is beneficial for dye adsorption. Because a majority of dyes contain ions, the introduction of ionic polymers can further enhance the adsorption process. Accordingly, the ionic monomer tetramethylethylenediamine acrylate (TEMEDA) is introduced into thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) hydrogels and the adsorption rate is improved. The kinetic transition in hybrid ionic/thermo-responsive hydrogels is still unclear. However, this behavior will prominently change the structure of these hydrogels, which further affects the dye adsorption. Therefore, it is of great importance to understand the kinetic transition in hybrid ionic/thermo-responsive hydrogels. We plan to probe the kinetic transition in the TEMEDA/PNIPAM hydrogel films with in-situ neutron reflectivity. By tracing the kinetic changes of the film structure and water distribution after a thermal stimulus, the ionic effect of TEMEDA on the kinetic transition in TEMEDA/PNIPAM hydrogel films will be obtained. At the instrument D17, neutron reflectivity with a time resolution
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MUELLER BUSCHBAUM Peter; BAIER Thomas; CUBITT Robert; KOSBAHN David; Morgan Le Dû; REITENBACH Julija; Vagias, Apostolos; WANG Peixi and ZHONG Qi. (2023). Ionic Effect on the Kinetic Transition in Ionic/Thermo-Responsive Hybrid Hydrogel Films Monitored by In-Situ Neutron Reflectivity. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-2131
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