Electrospinning principles

Phosphorus-Based Polymers From Synthesis to Applications 12 Poly(lactic acid) Science and Technology Processing, Properties, Additives and Applications 13 Cationic Polymers in Regenerative Medicine 14 Electrospinning Principles, Practice and Possibilities 15 Glycopolymer Code Synthesis of Glycopolymers and their Applications... 

Mayer R (1974) Organized structures in amorphous styrene-cis-l,4-isoprene block copolymers— low-angle X-ray-scattering and electron-microscopy. Polymer 15(3) 137-145 Mitchell GR (2015) Electrospinning principles, practice and possibilities. Royal Society of Chemistry, London... 

Although the electrospinning principle is simple, the process itself can be quite complicated because many parameters influence fibre diameters and final structures of nanofibres. These parameters are generally classified into three groups [6, 155-157] ... 

Although the principle of this technique is quite old, electrospinning (ES) has been developed as a powerful tool for the design of fiber meshes with fiber diameters ranging from 10 pm down to a few nanometers, mesh porosities of <90%, and pore sizes of < 1 to 100 pm [156, 157],... 

Electrospun nanostructured scaffolds have been intensively investigated as 3-D scaffolds for bone engineering. The principle of electrospinning is to apply high voltage on polymer solution or melt to overcome its surface tension and draw the... 

D Lukas et al, Physical principles of electrospirming (Electrospinning as a nanoscale technology of the twenty-first century) . Textile Progress, June 2009, 41(2) 59-140. 

Flgnre 123 Net-shape-nonwoven machiDe with process-integrated electrospinning device (a) and principle of the NSN technology (b). 

Core-sheath nanofibers of PEG-PLA and PEG can be prepared by electrospinning a water-in-oil emulsion in which the aqueous phase consists of a PEO solution in water and the oily phase is a chloroform solution of an amphiphilic PEG-PLLA diblock copolymer. The fibers obtained are composed of a PEO core and a PEG-PLA sheath with a sharp boundary in between. By adjusting the emulsion composition and the emulsification parameters the overall fiber size and the relative diameters of the core and the sheath can be changed. As shown in Fig. 5.15, a mechanism is proposed to explain the process of transformation fi-om the emulsion to the core-sheath fibers, i.e., the stretching and evaporation induced de-emulsification. In principle, this process can be applied to other systems to... 

The principle of electrospinning and structure of nonwoven by SEM photographs thick fibres viscose and nanofibres (150-200 nm) PVA. 

This problem can be overcome by using membranes prepared by electrospinning. The fibrous structure of membranes reduces the mass-transport resistance encountered by the chemical species passing through the channels of the membrane. As a result, electrodes coated with nanofibrous membranes offer, in principle, a negligible barrier to the analyte diffusion and high solvent permeability. 

The principle variables that govern nanofiber quality (or determine if electrospinning will occur at aU) are the average molecular weight of the polymer, the nature of the solvent, and the magnitude of the electric field used to induce electrospinning. 

The fundamental principles of electrospinning are dictated by three primary parameters including solution, processing, and environmental conditions (Table 10.2). Each process setting must be taken into close consideration to properly synthesize a scaffold with structural and functional characteristics similar to native cartilage. 

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