Principles of electrospinning

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... 

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

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. 

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],... 

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). 

Today the research work on needleless electrospinning generally focuses on four areas (1) investigation on the physical principle of needleless electrospinning process to understand the mechanism of controlling fibre quality, (2) experimental study on production parameters, (3) development of electrospinning machine at laboratory, pilot and production levels and (4) development of final fibre products for various purposes [87]. 

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... 

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... 

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