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

Electrospun Nanofibers of Immiscible Blends Containing a Fluorescence Dye: Direct Investigation of Polymer Domains

“…The PLA/PCL solutions have as solvents a mixture of CHCl 3 (major solvent), considered unsuitable for fiber formation (ε = 4.81), and methanol (ε = 32.7), 10 being not sufficient to cause efficient distribution in the solution during the jet on electrospinning. This is a situation different from that verified for systems with water 37 and other systems 36 with high dielectric constants. In addition, the system has very low electrical conductivity, which makes the process even more difficult.…”

“…50 We have reported that DSMI was leached from the membranes of poly(ethylene oxide)/sodium alginate (PEO/ SA) and cellulose acetate (CA) produced with the incorporation of fluorescent probe in the electrospinning solution. 37 To avoid this problem and enable the use of membranes for detection in solution, DSMI was chemically anchored in ethyl (hydroxyethyl)cellulose (hydrophilic) (EHEC) polymeric chains, 36 and xerogels modified with the dye were developed. 37 The dispersion of the modified xerogel increased with the increase in the hydrophobicity of the medium due to the hydrophobic chain of the inorganic polymer (XSB−DSMI, Figure 1).…”

“…The use of fluorescent dyes associated with polymer systems for the design of optical devices has been reported in the literature. − More recently, 4-[4-(dimethyl­amino)­styryl]-1-methylpyridinium iodide (DSMI, Figure ) was utilized in the design of materials based on functionalized polymeric systems. This compound is a perichromic probe, which has been utilized in the investigation of pure solvents, , solvent mixtures, − and β-cyclodextrin in aqueous medium. , DSMI has also been applied in the analysis of protein aggregation, − in the identification of the cell nucleus through interaction with DNA, in the analysis of glioma, and in the bactericidal treatment against Helicobacter pylori…”

Recent progress in cellulose-based electrospun nanofibers as multifunctional materials

“…However, HPMC with low molecular weight could not form nanofibers but just particles. Electrospun nanofibers were also fabricated from ethyl cellulose and modified ethyl cellulose in DMF, THF, ethanol solutions for fluorescent material, drug carrier, and food preservation, respectively, since ethyl cellulose has high versatility, biocompatibility, and excellent mechanical properties [28][29][30] . At the same time, it was noticed that some water-soluble cellulose derivatives were employed for electrospinning in order to avoid the use of unfavourable organic solvents.…”

“…Moreover, compared to free nanoparticles, electrospun nonwoven fabrics have less safety issues owing to the immobilization of responsive compounds on the fibers, and better handling property enabling easy application in various devices. Ethyl(hydroxyethyl)cellulose (EHEC) was functionalized by anchoring 4-(2-(pyridine-4-yl)vinyl) phenol (PBM) and 4-[4-(dimethylamino)styryl]pyridine, and then mixed with poly(methyl methacrylate) (PMMA) to prepare electrospun nanofibers for the detection of CNin water 60 . EHEC endowed the entire matrix with high hydrophilicity even at a low concentration (PMMA/EHEC 20:1 wt/wt), so as to have the high water retention capacity for the application in fluorogenic optical devices, and achieve the detection and quantification limits of 2.15 × 10 −5 and 7.17 × 10 −5 mol L −1 , respectively.…”