Electrospinning fabrication and characterization of poly(vinyl alcohol)/montmorillonite nanofiber mats

Lee, Hyun Woo; Karim, Mohammad Rezaul; Ji, Hyun Mi; Choi, Jin Hyun; Ghim, Han Do; Park, Sung Min; Oh, Weontae; Yeum, Jeong Hyun

doi:10.1002/app.30165

Cited by 73 publications

(53 citation statements)

References 32 publications

(22 reference statements)

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“…Fibers were collected on an electrically grounded aluminum foil placed at 15 cm vertical distance to the needle tip (Tip-Collector Distance, TCD). The above spinning conditions were found being the best condition to make PVA based nanofibers in our previous report Karim et al, 2009;Lee et al, 2009a;Lee et al, 2009b;Park et al, 2009;Park et al, 2010). Figure 5 demonstrates FE-SEM and TEM images of PVA, PVA/MMT and PVA/MMT/Ag nanofibers electrospun with 5 wt.% of MMT and 5 wt.% of Ag nanoparticles.…”

Section: Methodsmentioning

confidence: 75%

Electrospinning Fabrication and Characterization of Water Soluble Polymer/Montmorillonite/Silver Nanocomposite Nanofibers out of Aqueous Solution

Yeum¹,

Park²,

Kim³

et al. 2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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Section: Methodsmentioning

confidence: 75%

Electrospinning Fabrication and Characterization of Water Soluble Polymer/Montmorillonite/Silver Nanocomposite Nanofibers out of Aqueous Solution

Yeum¹,

Park²,

Kim³

et al. 2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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“…2a, the electrospinning voltages significantly affected morphology of the CMs; at 10 kV, the microspheres were not fabricated while micron-sized spheres were obtained for 2.5 and 5.0 kV. Several studies previously indicated that fiber diameters could be controlled by changing electrospinning voltages (33)(34)(35). Electrospinning is sputtering and curling of charged jets upon voltage differences.…”

Section: Discussionmentioning

confidence: 99%

Electrospun Chitosan Microspheres for Complete Encapsulation of Anionic Proteins: Controlling Particle Size and Encapsulation Efficiency

et al. 2013

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Abstract. Electrospinning was employed to fabricate chitosan microspheres by a single-step encapsulation of proteins without organic solvents. Chitosan in acetic acid was electrospun toward a grounded sodium carbonate solution at various electric potential and feeding rates. Electrospun microspheres became insoluble and solidified in the sodium carbonate solution by neutralization of chitosan acetate. When the freeze-dried microspheres were examined by scanning electron microscopy, the small particle size was obtained at higher voltages. This is explained by the chitosan droplet size at the electrospinning needle was clearly controllable by the electric potential. The recovery yield of chitosan microspheres was dependent on the concentration of chitosan solution due to the viscosity is the major factor affecting formation of chitosan droplet during curling of the electrospinning jets. For protein encapsulation, fluorescently labeled bovine serum albumin (BSA) was codissolved with chitosan in the solution and electrospun. At higher concentration of sodium carbonate solution and longer solidification time in the solution, the encapsulation efficiency of the protein was confirmed to be significantly high. The high encapsulation efficiency was achievable by instant solidification of microspheres and electrostatic interactions between chitosan and BSA. Release profiles of BSA from the microspheres showed that the protein release was faster in acidic solution due to dissolution of chitosan. Reversed-phase chromatography of the released fractions confirmed that exposure of BSA to acidic solution during the electrospinning did not result in structural changes of the encapsulated protein.

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“…It was shown that the increase in the CNC concentration in the fibres led to a significant enhancement of mechanical properties [9]. Electrospun PVA fibres have been extensively studied to understand the effects of molecular weight [10], concentration [9] and the presence of additives on mechanical properties and thermal stability [11]. Polystyrene (PS), another commodity polymer, has also been electrospun into fibres [12].…”

Section: Introductionmentioning

confidence: 99%

Orientation of cellulose nanocrystals in electrospun polymer fibres

et al. 2015

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Polystyrene and poly(vinyl alcohol) nanofibres containing cellulose nanocrystals (CNCs) were successfully produced by electrospinning. Knowledge of the local orientation of CNCs in electrospun fibres is critical to understand and exploit their mechanical properties. The orientation of CNCs in these electrospun fibres was investigated using transmission electron microscopy (TEM) and Raman spectroscopy. A Raman band located at *1095 cm -1 , associated with the C-O ring stretching of the cellulose backbone, was used to quantify the orientation of the CNCs within the fibres. Raman spectra were fitted using a theoretical model to characterize the extent of orientation. From these data, it is observed that the CNCs have little orientation along the direction parallel to the axis of the fibres. Evidences for both oriented and nonoriented regions of CNCs in the fibres are presented from TEM images of nanofibres. These results contradict previously published work in this area and micromechanical modelling calculations suggest a uniform orientation of CNCs in electrospun polymer fibres. It is demonstrated that this explains why the mechanical properties of electrospun fibre mats containing CNCs are not always the same as that would be expected for a fully oriented system.

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Electrospinning fabrication and characterization of poly(vinyl alcohol)/montmorillonite nanofiber mats

Cited by 73 publications

References 32 publications

Electrospinning Fabrication and Characterization of Water Soluble Polymer/Montmorillonite/Silver Nanocomposite Nanofibers out of Aqueous Solution

Electrospinning Fabrication and Characterization of Water Soluble Polymer/Montmorillonite/Silver Nanocomposite Nanofibers out of Aqueous Solution

Electrospun Chitosan Microspheres for Complete Encapsulation of Anionic Proteins: Controlling Particle Size and Encapsulation Efficiency

Orientation of cellulose nanocrystals in electrospun polymer fibres

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