Electrospun blends comprised of poly(methyl methacrylate) and ethyl(hydroxyethyl)cellulose functionalized with perichromic dyes.

Autor: Dreyer JP; Departamento De Química, Universidade Federal De Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil. Electronic address: j.dreyer@posgrad.ufsc.br., Stock RI; Departamento De Química, Universidade Federal De Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil., Nandi LG; Departamento De Engenharia Química e Engenharia De Alimentos, Universidade Federal De Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil., Bellettini IC; Departamento De Ciências Exatas e Educação, Universidade Federal De Santa Catarina, UFSC, Campus De Blumenau, Blumenau, SC, 89065-004, Brazil., Machado VG; Departamento De Química, Universidade Federal De Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil. Electronic address: vanderlei.machado@ufsc.br.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2020 May 15; Vol. 236, pp. 115991. Date of Electronic Publication: 2020 Feb 21.
DOI: 10.1016/j.carbpol.2020.115991
Abstrakt: 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.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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