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感覚ポリマーのセンシング性能向上のためのツールとしての感覚ポリマー発泡体の開発
Sensory Polymeric Foams as a Tool for Improving Sensing Performance of Sensory Polymers.
PMID: 30544951 PMCID: PMC6308416. DOI: 10.3390/s18124378.
抄録
固体感覚高分子フィルムから調製した微小細胞感覚高分子を水性Hg(II)検出プロセスで試験し、その感覚挙動を解析した。まず、ラジカル共重合法により厚さ１００μｍのアクリル系固体高分子フィルムを得た。次に、ジチゾンセンサーのモチーフを簡単な5段階のルートで固定化し、取り扱い可能な比色感覚フィルムを得た。微多孔構造を形成するために、350bar、60℃でScCO₂バッチプロセスで発泡させ、セルサイズが5μm程度の均質なモルフォロジーを得た。その結果、反応時間（RT）は約25%短縮され、検出限界と定量限界（LODとLOQ）は、発泡フィルムを使用した場合に比べて4倍低くなりました（マイクロセルラー構造に関連する比表面の増加により）。
Microcellular sensory polymers prepared from solid sensory polymeric films were tested in an aqueous Hg(II) detection process to analyze their sensory behavior. First, solid acrylic-based polymeric films of 100 µm thickness were obtained via radical copolymerization process. Secondly, dithizone sensoring motifs were anchored in a simple five-step route, obtaining handleable colorimetric sensory films. To create the microporous structure, films were foamed in a ScCO₂ batch process, carried out at 350 bar and 60 °C, resulting in homogeneous morphologies with cell sizes around 5 µm. The comparative behavior of the solid and foamed sensory films was tested in the detection of mercury in pure water media at 2.2 pH, resulting in a reduction of the response time (RT) around 25% and limits of detection and quantification (LOD and LOQ) four times lower when using foamed films, due to the increase of the specific surface associated to the microcellular structure.