Multi-jet electrospinning systems can be designed to increase both productivity and cover area for large-scale nanofibre production. In this work several multi-jet electrospinning setups were tested. A solution of 7 wt% PEO was electrospun varying the number of nozzles between 2 and 16. Tests showed that the divergence angle between jets can be reduced employing a secondary electrode. The standard configuration consisting of a charged solution and a grounded collector plate was used, as was the opposite case of a charged collector and a grounded solution. These configurations were, respectively, tested with positive and negative polarity. Process operating conditions were varied in order to obtain nanofibres without defects. Samples collected were examined with SEM; it was demonstrated that multi-jet electrospinning works with standard and reverse configurations both applying positive and negative polarity. Good quality nanofibres were obtained in both cases. (C) 2009 Elsevier B.V. All rights reserved.
Experimental investigations on the multi-jet electrospinning process
Varesano A;Carletto RA;Mazzuchetti G
2009
Abstract
Multi-jet electrospinning systems can be designed to increase both productivity and cover area for large-scale nanofibre production. In this work several multi-jet electrospinning setups were tested. A solution of 7 wt% PEO was electrospun varying the number of nozzles between 2 and 16. Tests showed that the divergence angle between jets can be reduced employing a secondary electrode. The standard configuration consisting of a charged solution and a grounded collector plate was used, as was the opposite case of a charged collector and a grounded solution. These configurations were, respectively, tested with positive and negative polarity. Process operating conditions were varied in order to obtain nanofibres without defects. Samples collected were examined with SEM; it was demonstrated that multi-jet electrospinning works with standard and reverse configurations both applying positive and negative polarity. Good quality nanofibres were obtained in both cases. (C) 2009 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.