研究目的
Investigating the development of novel multifunctional luminescent electrospun fluorescent nanofiber chemosensor-filters for versatile sensing of pH, temperature, and metal ions.
研究成果
The study demonstrates the successful development of novel multifunctional ES fibrous membranes with on/off switchable fluorescence emission properties, thermo-induced second fluorescence intensity enhancement characteristics, and high sensitivity toward pH and Hg2+. These membranes have potential applications in multifunctional devices for specific HTM chelation, as well as pH and temperature sensing in aqueous environments.
研究不足
The primary concern with solution-based chemosensors is that they are not reusable. The study addresses this by developing reusable polymer film chemosensors, but the focus on ES nanofibers introduces challenges in maintaining fibrous structure in aqueous solutions.
1：Experimental Design and Method Selection:
The study employed an electrospinning process to prepare multifunctional fluorescent chemosensors from poly(N-Isopropylacrylamide-co-N-methylolacrylamide-co-rhodamine derivative) (poly(NIPAAm-co-NMA-co-RhBN2AM)). The synthesis involved free-radical polymerization.
2：Sample Selection and Data Sources:
Samples were prepared with different compositions of NIPAAm, NMA, and RhBN2AM. The sensory copolymers were characterized for their optical properties, morphological characteristics, and LCSTs.
3：List of Experimental Equipment and Materials:
Equipment included a Bruker AM 300 NMR spectrometer, Shimadzu UV–Vis spectrophotometer, TA Q500 thermogravimetric analyzer, Hitachi S-4800 SEM, Leica LCS SP5 confocal microscope, and Horiba Jobin Yvon Fluorolog-3 spectrofluorometer. Materials included NIPAAm, NMA, AIBN, RhB, and various solvents.
4：Experimental Procedures and Operational Workflow:
The electrospinning process was used to fabricate ES nanofibers, with polymer solutions filled into a metallic needle using syringe pumps. High-voltage power supply was set at 10 kV during the ES process.
5：Data Analysis Methods:
PL spectra were measured to study photophysical properties, and SEM was used to investigate morphologies of ES nanofibers.
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