Preparation and anisotropic mechanical behavior of highly‐oriented electrospun poly(butylene terephthalate) fibers

Abstract

This work describes the effect of the speed of drum-type rotating collector in an electrospinning process on the orientation of electrospun poly(butylene terephthalate) fiber mats, and its effect on the tensile properties. The degree of orientation increased with the increase in the drum speed (surface velocity) up to a critical level, and thereafter, wavy fibers were observed. The average diameter reduced and its distribution became narrower with increase in the velocity. The mechanical properties in a parallel direction improved about three times with increase in the surface velocity. The anisotropic mechanical behavior could be predicted with a simple classical equation.

Engineering on the Straight and Narrow: The Mechanics of Nanofibrous Assemblies for Fiber-Reinforced Tissue Regeneration

“…81,82,95,108 However, as this method only generates information regarding the boundaries of the sample, it introduces errors associated with inhomogeneous strain fields and sample slippage at the grips. Therefore, measurement of material or local strains from the sample mid-substance more accurately reflects the true strain of the material.…”

“…Constitutive models of electrospun scaffolds vary widely in their complexity, from simple geometrically motivated linear models 81,82,108 to hyperelastic continuum models.…”

“…108 In a similar application, Li et al used a linear spring model that accounted for fiber dispersion to predict the response of electrospun PCL scaffolds; the model closely approximated the experimentally measured dependence of modulus on degree of dispersion only when it permitted unconstrained sliding between fibers. 81 Nerurkar et al 82 applied a linear homogenization model to characterize the dependence of aligned PCL on fiber orientation in uniaxial tension, demonstrating that fiber connectivity and nonfibrillar matrix are key determinants of this relationship.…”

Strong Orientation of Polymer Chains and Small Photochromic Molecules in Polyamide 6 Electrospun Fibers

“…Even though some research groups focused their attention on the orientation of electrospun fibers for different polymer systems, [7][8][9] few alignment data are available.…”

Poly(butylene terephthalate) electrospun/melt‐blown composite mats for white blood cell filtration

“…11 The nanofibers were directly electrospun on PBT melt-blown nonwovens to form a composite nano-micro structure. Their filtration performance was evaluated through analysis and comparison of the testing data with those of original filters using melt-blown nonwovens only.…”