What is coaxial electrospinning?
Coaxial electrospinning is a modification of the conventional electrospinning process (Díaz et al., 2008) involving the arrangement of multiple solution feed systems to simultaneously electrospin two or more polymer solutions from coaxial capillaries.
Why is DMF used in electrospinning?
However, according to the obtained results, the addition of the DMF makes it easier to induce the transformation of particles electrospraying to fibers electrospinning with smaller diameter. This is attributed to the higher dielectric constant, lower vapor pressure, and higher electric conductivity of DMF.
What is the difference between electrospinning and electrospraying?
The difference between electrospinning and electrospraying techniques is based on the concentration of the polymer solution. When the solution concentration is high, the jet from Taylor cone is stabilized, and elongation takes place by whipping instability mechanism.
What is emulsion electrospinning?
Emulsion electrospinning is a novel and simple technique to fabricate core-shell nanofibers, and either water-in-oil (W/O) or oil-in-water (O/W) emulsions can be electrospun to directly encapsulate hydrophilic or hydrophobic compounds into core-shell fibers, respectively.
Why do we use electrospinning?
The important advantages of electrospinning technique are the production of very thin fibers to the order of few nanometers with large surface areas, ease of functionalisation for various purposes, superior mechanical properties and ease of process as suggested by many experts in this field.
Is PLA soluble in DMF?
Polylactic acid (PLA) was dissolved in dimethylformamide (DMF) to produce a polymer solution. Bead is considered as a defect towards an electrospun fibres, yet previous study found that PLA/DMF produced beaded fibres for all concentrations.
Why polymers are used in electrospinning?
2.1. Natural polymers are preferred over synthetic polymers in medical and biological uses because of their low immunogenicity and better biocompatibility. Recent researchers have reported the use of electrospinning process of natural polymers such as gelatine, collagen, and silk fibroin [36–41].
What is electrospinning in tissue engineering?
Electrospinning is a spinning technique that uses electrostatic forces to produce fibrous scaffolds from biocompatible polymers. A simple equipment setup makes electrospinning a versatile way to process all of the different biocompatible polymers into fibrous scaffolds.
What is the driving force for electrospinning?
Electrospinning is a fiber production method that uses electric force to draw charged threads of polymer solutions or polymer melts up to fiber diameters in the order of some hundred nanometers.
Does chloroform dissolve PLA?
PLA is soluble in chloroform at room temperature. Before you start your experiment please pre dry your PLA in vacuum oven at 80C overnight to remove unnecessary moisture.
What are coaxial and emulsion electrospinning?
Coaxial electrospinning and emulsion electrospinning have been the commonly used methods for encapsulating drugs and growth factors in the core of the fibers.
Can coaxial electrospinning produce core-sheath fibers?
Coaxial electrospinning with two miscible solutions can produce fibers with distinct core-sheath structure if the jet travel time is shorter than the solution diffusion time constant and the evaporation rate of the polymer solvents is sufficiently fast.
What are the current research areas in coaxial electrospinning?
Another major area of coaxial electrospinning research is centered on the energy area. Among many energy-related applications, the development of advanced electrodes for the rechargeable Li-ion battery has been a major interest given their high demand.
What are the applications of coaxial electrospinning in photocatalysis?
Fibers and particles fabricated by coaxial electrospinning have many applications in photocatalysis, such as photocatalytic degradation, self-cleaning, catalytic hydrogen production, and catalytic cracking.