Starch is a biocompatible and economical biopolymer in which interest has been shown in obtaining electrospun fibers. This research reports that cassava (CEX) and pea (PEX) starches pretreated by ...means of reactive extrusion (REX) improved the starches rheological properties and the availability of amylose to obtain fibers. Solutions of CEX and PEX (30-36%
/
) in 38%
formic acid were prepared and the rheological properties and electrospinability were studied. The rheological values indicated that to obtain continuous fibers without beads, the entanglement concentration (Ce) must be 1.20 and 1.25 times the concentration of CEX and PEX, respectively. In CEX, a higher amylose content and lower viscosity were obtained than in PEX, which resulted in a greater range of concentrations (32-36%
/
) to obtain continuous fibers without beads with average diameters ranging from 316 ± 65 nm to 394 ± 102 nm. In PEX, continuous fibers without beads were obtained only at 34%
with an average diameter of 170 ± 49 nm. This study showed that starches (20-35% amylose) pretreated through REX exhibited electrospinning properties to obtain fibers, opening the opportunity to expand their use in food, environmental, biosensor, and biomedical applications, as vehicles for the administration of bioactive compounds.
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IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
Maltodextrin (MD) is a natural polymer ideal for electrospinning due to its non-toxicity, water solubility, and low viscosity. In this investigation, MD solutions, each containing a different ...dextrose equivalent (DE) value of 18, 10, and 4, were studied in an ethanol/water solvent system for the manufacture of fibers, and their rheological properties and electrospinnability were evaluated. The viscosity data from the solutions indicated that the entanglement concentration (Ce) was higher in the MD solution with the highest DE value, with a value of 40.02% (w/v). As the concentration of MD in the electrospinning solutions increased, the transition of the beads to a beads–fibers mixture and finally to fibers was observed, this behavior being more notable in MD18. To obtain well-formed MD fibers, the optimum concentrations of MD18 and MD10 were found to be 1.30 and 1.22 times the Ce, respectively. Smooth, continuous fibers without beads and diameters of 627.52 ± 146.12 nm and 748.20 ± 256.48 nm, respectively, were produced, while in the MD solution with DE 4, a cluster of short fibers with a diameter of 620.23 ± 167.09 nm was observed. The electrical conductivity significantly influenced the diameter of the fibers, and it was apparent that as the concentration of MD increased, the solution's electrical conductivity decreased. Electrospun MD fibers were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry. This study provides a means of producing MD fibers for use in food applications as vehicles for bioactive compounds.
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•Electrospun fibers were successfully obtained from maltodextrins (MD) ethanol/water.•Maltodextrin with the highest dextrose equivalent (DE) generated the best fibers.•DE showed influence on electrospun fibers morphology with ethanol/water solvent.•FT-IR spectra show relationship between absorption values and the fiber diameter.•Electrical conductivity was significant correlated with electrospun fiber diameter.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Starch is a biocompatible and economical biopolymer in which interest has been shown in obtaining electrospun fibers. This research reports that cassava (CEX) and pea (PEX) starches pretreated by ...means of reactive extrusion (REX) improved the starches rheological properties and the availability of amylose to obtain fibers. Solutions of CEX and PEX (30-36% w/v) in 38% v/v formic acid were prepared and the rheological properties and electrospinability were studied. The rheological values indicated that to obtain continuous fibers without beads, the entanglement concentration (Ce) must be 1.20 and 1.25 times the concentration of CEX and PEX, respectively. In CEX, a higher amylose content and lower viscosity were obtained than in PEX, which resulted in a greater range of concentrations (32-36% w/v) to obtain continuous fibers without beads with average diameters ranging from 316 ± 65 nm to 394 ± 102 nm. In PEX, continuous fibers without beads were obtained only at 34% w/v with an average diameter of 170 ± 49 nm. This study showed that starches (20-35% amylose) pretreated through REX exhibited electrospinning properties to obtain fibers, opening the opportunity to expand their use in food, environmental, biosensor, and biomedical applications, as vehicles for the administration of bioactive compounds.
Full text
Available for:
IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
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