Electrospinning of chitosan from it

Electrospinning of chitosan from its solutions in
2% aqueous acetic acid was studied by adding poly(vinyl
alcohol) (PVA) as a “guest” polymer. Properties of the
chitosan/PVA solutions including viscosity, conductivity, and
surface tension were measured, and effects of the polymer
concentration, chitosan/PVA mass ratio and processing
parameters (applied voltage, flow rate, capillary-to-collector
distance) on the electrospinnability of chitosan/PVA were
investigated. Analyses of scanning electron micrographs and
transmission electron micrographs suggested that the chitosan/PVA ultrafine fibers were often obtained along with
beads, and chitosan was located in the elctrospun fibers as
well as in the beads. Uniform chitosan/PVA fibers with an
average diameter of 99±21 nm could be prepared from a 7%
chitosan/PVA solution in 40:60 mass ratio. Results of
Fourier transform infrared spectroscopy and X-ray diffraction demonstrated that there were possible hydrogen bonds
between chitosan and PVA molecules, which could weaken
the strong interaction in chitosan itself and facilitate
chitosan/PVA electrospinnability. The electrospun chitosan/
PVA membranes showed higher water uptake and would
have potential applications in wound dressings.

Kết quả (Anh) 1:

Electrospinning of chitosan from its solutions in2% aqueous acetic acid was studied by adding poly (vinylalcohol) (PVA) as a "guest" polymer. Properties of theChitosan/PVA solutions including viscosity, conductivity, andsurface tension were measured, and effects of the polymerconcentration hand, chitosan/PVA mass ratio and processingparameters (applied voltage, flow rate, capillary-to-collectordistance) on the electrospinnability of chitosan/PVA wereinvestigated. Analyses of scanning electron micrographs andtransmission electron micrographs suggested that the chitosan/PVA ultrafine fibers were often obtained along withbeads, and chitosan was located in the elctrospun fibers aswell as in the beads. Uniform chitosan/PVA fibers with anaverage diameter of 99 ± 20 nm could be prepared from a 7%Chitosan/PVA solution in a 40:60 mass ratio. Results ofFourier transform infrared spectroscopy and x-ray diffraction demonstrated that there were possible hydrogen bondsbetween chitosan and PVA molecules, which could weakenthe strong interaction in chitosan itself and facilitateChitosan/PVA electrospinnability. The electrospun chitosan/PVA membranes showed higher water uptake and wouldhave potential applications in wound dressings.

Kết quả (Anh) 2:

Electrospinning of chitosan from its printing solutions
2% aqueous acetic acid was studied by adding poly (vinyl
alcohol) (PVA) as a "guest" polymer. Properties of the
chitosan / PVA solutions gồm viscosity, conductivity, and
surface tension Were measured, and effects of the polymer
concentration, chitosan / PVA mass ratio and processing
parameters (áp voltage, flow rate, capillary-to-collector
distance) on the electrospinnability of chitosan / PVA là
investigated. Scanning electron micrographs of analyzes and
transmission electron micrographs suggested rằng chitosan / PVA ultrafine fibers often Do thu được là along with
beads, and was located in the elctrospun chitosan fibers as
well as in the beads. Uniform chitosan / PVA fibers with an
average diameter of 99 ± 21 nm could be the prepared from a 7%
chitosan / PVA mass ratio 40:60 print solution. Results of
Fourier transform infrared spectroscopy and X-ray diffraction demonstrated mà There were possible The hydrogen bonds
of chitosan and PVA molecules giữa mà assassin could
print the strong interaction and facilitate Itself chitosan
chitosan / PVA electrospinnability. The electrospun chitosan /
PVA membranes showed Higher water uptake and would
have wound dressings potencial print applications.