Conventional Electrospinning
Elettrofilatura convenzionale
Wikipedia Summary
Electrospinning is a fiber production method that uses electrical force to draw charged threads of polymer solutions for producing nanofibers with diameters ranging from nanometers to micrometers. Electrospinning shares characteristics of both electrospraying and conventional solution dry spinning of fibers. The process does not require the use of coagulation chemistry or high temperatures to produce solid threads from solution. This makes the process particularly suited to the production of fibers using large and complex molecules. Electrospinning from molten precursors is also practiced; this method ensures that no solvent can be carried over into the final product.
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Panoramica del Processo
Electrospinning is a fiber production method that uses electrical force to draw charged threads of polymer solutions for producing nanofibers with diameters ranging from nanometers to micrometers. Electrospinning shares characteristics of both electrospraying and conventional solution dry spinning of fibers. The process does not require the use of coagulation chemistry or high temperatures to produce solid threads from solution. This makes the process particularly suited to the production of fibers using large and complex molecules. Electrospinning from molten precursors is also practiced; this method ensures that no solvent can be carried over into the final product.
Protocollo Operativo
- 01 Preparazione soluzione polimerica
Dissoluzione del polimero in solvente appropriato a concentrazione controllata (5–30 wt%).
- 02 Caricamento siringa
Trasferimento della soluzione in siringa con ago metallico collegato a generatore di alta tensione.
- 03 Applicazione campo elettrico
Applicazione di tensione 10–30 kV tra ago e collettore, formazione del cono di Taylor sulla punta dell'ago.
- 04 Formazione getto
Superamento della tensione superficiale: il getto carico si allunga verso il collettore con instabilità a frusta (whipping).
- 05 Evaporazione solvente e raccolta
Il solvente evapora durante il volo; le nanofibre solidificate si depositano sul collettore come mat non-tessuto.