title: Free surface electrospinning of fibers containing microparticles.
abstract: Many materials have been fabricated using electrospinning, including pharmaceutical formulations, superhydrophobic surfaces, catalysis supports, filters, and tissue engineering scaffolds. Often these materials can benefit from microparticles included within the electrospun fibers. In this work, we evaluate a high-throughput free surface electrospinning technique to prepare fibers containing microparticles. We investigate the spinnability of polyvinylpyrrolidone (PVP) solutions containing suspended polystyrene (PS) beads of 1, 3, 5, and 10 μm diameter in order to better understand free surface electrospinning of particle suspensions. PS bead suspensions with both 55 kDa PVP and 1.3 MDa PVP were spinnable at 1:10, 1:5, and 1:2 PS:PVP mass loadings for all particle sizes studied. The final average fiber diameters ranged from 0.47 to 1.2 μm and were independent of the particle size and particle loading, indicating that the fiber diameter can be smaller than the particles entrained and can furthermore be adjusted based on solution properties and electrospinning parameters, as is the case for electrospinning of solutions without particles.
authors.affiliation: Department of Chemical Engineering, Massachusetts Institute of Technology, E19-502B, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States.
authors.forename: Blair K
authors.initials: BK
authors.lastname: Brettmann
authors.forename: Shirley
authors.initials: S
authors.lastname: Tsang
authors.forename: Keith M
authors.initials: KM
authors.lastname: Forward
authors.forename: Gregory C
authors.initials: GC
authors.lastname: Rutledge
authors.forename: Allan S
authors.initials: AS
authors.lastname: Myerson
authors.forename: Bernhardt L
authors.initials: BL
authors.lastname: Trout
mesh_terms: D000431:Ethanol / Q000737:chemistry; D055616:Microtechnology / Q000379:methods*; D011137:Polystyrenes / Q000737:chemistry; D011205:Povidone / Q000737:chemistry; D013499:Surface Properties
chemical_list: D011137:Polystyrenes; D000431:Ethanol; D011205:Povidone