Surface morphology and beta-phase formation of single polyvinylidene fluoride (PVDF) composite nanofibers

Abstract

This study has developed a reliable model to design and engineer PVDF nanofiber in terms of both morphological and fraction of beta-phase content based on response surface methodology (RSM). The model was further used to assess the effect of each individual electrospinning processing parameter as well as their interdependences on the properties of electrospun PVDF nanofibers. Our experimental results highly agreed with the modeling. The results indicated that both morphological and crystalline properties of PVDF are highly affected by electrospinning process parameters, particularly the fraction of betaphase content. A beadless PVDF nanofiber with the maximum fraction of the beta phase was achieved through a numerical optimization process.

Flexible electrospun PVDF–BaTiO3 hybrid structure pressure sensor with enhanced efficiency

“…This improvement is because of the larger elongation of PVDF/BaTiO 3 nanobers which comes from the fact that polymer solution of PVDF/BaTiO 3 creates higher charge density in the electrospinning jet in compare to pure PVDF polymer solution. 36 However, still some beads formations can be seen in BaTiO 3 concentration of 6 wt%, as shown in Fig. 5(a).…”

Electrospun Polyvinylidene Fluoride-Based Fibrous Scaffolds with Piezoelectric Characteristics for Bone and Neural Tissue Engineering

“…As mentioned above, piezoelectric properties of β-PVDF facilitate the generation of electrical potential on its surface due to mechanical deformation. The stretching of the polymer jet induces the β-PVDF phase, i.e., transforming nonpolar α-phase into polar β-phase [17,122,123,124,125]. So piezoelectric β-PVDF fibrous scaffolds that generate electrical stimulation are particularly attractive for bone and neural tissue engineering applications [15,17,46,125,126].…”

“…These parameters include PVDF concentration, solvent type, applied voltage, spinning distance, stationary or rotating collector, etc. [17,122,123,124,125,126,127,128]. In general, the fiber diameter increases with increasing PVDF concentration due to the higher solution viscosity and stronger intermolecular interactions.…”

Approaches for Increasing the β-phase Concentration of Electrospun Polyvinylidene Fluoride (PVDF) Nanofibers

“…The electrospinning synthesis process, on the other hand, is a popular method for generating β-phase PVDF nanofibers without any 5,9,[11][12][13][14][15] post-treatment.…”

“…Zheng et al discussed the polymorphism control of electrospun PVDF. Through adjusted the parameters such as decreasing electrospinning temperature, lower the feeding rate, and shorten the tip-to-collector distance, the β-phase of PVDF can be 15 enhanced. Gafari et al developed a model from the experiments to predict the surface morphology and properties of PVDF nanofibers.…”