Investigation of the Influence of Salts on the Co-nonsolvency Effect of Thin Polymer Films in Mixed Water/Dimethyl Sulfoxide Vapors
The influence of salts with different anions and cations on the swelling and phase transition behavior in water and water/dimethyl sulfoxide (DMSO) mixtures of poly(N-isopropylmethacrylamide) (PNIPMAM) thin films will be studied. The vapor sensitive PNIPMAM thin films are excellent candidates for applications in the field of sensors, soft robotics, tissue engineering, and implantable electronics. Polymer-based sensors are generally used to detect specific vapors in the surrounding atmosphere and are an alternative to rather expensive techniques like gas chromatography devices. Among these, sensors to detect DMSO are of special importance in quality control measure in foods and beverages as well as in the assessment of sea life health. To tune the responsiveness of these nanodevices, additives such as salts can be used. In this study we aim to elucidate the influence of the cation and anion species by varying the salt composition of Mg(NO3)2, Mg(ClO4)2, or NaClO4 in PNIPMAM thin films. By performing in situ neutron reflectometry measurements at D17 with a high time resolution of ¿t = 5 s, we want to elucidate the solvent distribution during the swelling and exchange process.
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MUELLER BUSCHBAUM Peter; CUBITT Robert; KOSBAHN David; Morgan Le Dû; REITENBACH Julija and SPANIER Lukas. (2023). Investigation of the Influence of Salts on the Co-nonsolvency Effect of Thin Polymer Films in Mixed Water/Dimethyl Sulfoxide Vapors. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-2130
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