AI Article Synopsis
- The study involves modifying ethyl(hydroxyethyl)cellulose (EHEC) with two compounds to create fluorescent dyes that enhance its properties.
- The modified EHECs were combined with poly(methyl methacrylate) (PMMA) to produce hydrophilic nanofibers using electrospinning, exhibiting notable water absorption compared to pure PMMA.
- The resulting PMMA/EHEC-PBM nanofibers displayed cyan fluorescence under UV light, and the potential application for detecting cyanide in water was highlighted.
Article Abstract
Ethyl(hydroxyethyl)cellulose (EHEC) was modified with 4-(2- (pyridin-4-yl)vinyl) phenol (PBM) and 4- [4-(dimethylamino)styryl]pyridine (DMASP), which are precursors of two well-known perichromic/fluorescent dyes, Brooker's merocyanine (BM) and 4- [4-(dimethylamino)styryl]-1-methypyridinium iodide (DSMI). The EHECs were mixed with poly(methyl methacrylate) (PMMA) to allow electrospinning and the nanofibers obtained were characterized by scanning electron microscopy, fluorescence microscopy, ATR-FTIR spectroscopy, thermogravimetry analysis, differential scanning calorimetry and fluorescence spectrophotometry and the absolute quantum yield and contact angle were determined. The PMMA/EHEC blends formed hydrophilic nanofibers, with high water absorption, in contrast to the pure PMMA nanofibers. PMMA/EHEC-PBM nanofibers exhibited cyan emission when excited in the UV region and PMMA/EHEC-DMASP showed intense green emission under excitation with laser in the blue region. Electrospinning of PMMA/modified EHEC in the proportion of 5:2 (wt/wt) provided nanochain-like nanofibers, which were verified by confocal microscopy. The potential for the use of the electrospun PMMA/EHEC-PBM nanofibers in the detection of CN in water was demonstrated.
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| http://dx.doi.org/10.1016/j.carbpol.2020.115991 | DOI Listing |
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