Magnetoactive electrospun hybrid scaffolds based on poly(vinylidene fluoride‐co‐trifluoroethylene) and magnetite particles with varied sizes

Abstract

The development of functional magnetoactive materials fabricated in the form of electrospun scaffolds is of paramount importance for modern medicine and pharmaceuticals. To precisely control the morphology and magnetic properties of the composite magnetoactive scaffolds, the electrospinning conditions, incorporation method of magnetic particles into the polymer solution to avoid agglomeration, and the shape/size of the particles should be thoroughly studied. In this study, hybrid magnetoactive scaffolds based on poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)), doped with either unmodified magnetite (Fe 3 O 4 ) or magnetite particles modified with oleic acid (Fe 3 O 4 /OA), have been fabricated by electrospinning. Modification of magnetite particles by oleic acid results in the formation of nanosized particles in comparison with submicron-sized Fe 3 O 4 particles (37 vs. 329 nm), which reveal a greater affinity to P(VDF-TrFE) due to their hydrophobic surface. Composite scaffolds prepared using 30 wt% polymer solution with 8 wt% Fe 3 O 4 and Fe 3 O 4 /OA reveal saturation magnetization values of 9.14 and 5.8 emu/g, respectively. The saturation magnetization of composite scaffolds agrees well with the saturation magnetization of the initial magnetites. Considering the better dispersion of Fe 3 O 4 /OA in the polymer solution, a series of composite scaffolds with 4 and

PVDF‐Based Flexible Piezoelectric Tactile Sensors: Review

“…A successful piezoelectric haptic sensor was created by Wang et al [76] using silicon dioxide (SiO 2 ) prepared silicon sheets and PVDF nanorod arrays prepared using the AAO template method. In addition to doping PVDF-based materials, researchers [122,123] have proposed the use of composite materials, including piezoelectric polymer matrices and nanoscale magnetic fillers, to eliminate shortcomings in biocompatibility, mechanical, and other properties. Botvin et al [124] used magnetic fillers-magnetite (Fe 3 O 4 ) nanoparticles as fillers and modified the surface of the fillers with citric acid (CA) and oleic acid (OA) modifiers.…”

“…In addition to doping PVDF-based materials, researchers [122,123] have proposed the use of composite materials, including piezoelectric polymer matrices and nanoscale magnetic fillers, to eliminate shortcomings in biocompatibility, mechanical, and other properties. Botvin et al [124] used magnetic fillers-magnetite (Fe 3 O 4 ) nanoparticles as fillers and modified the surface of the fillers with citric acid (CA) and oleic acid (OA) modifiers. The effect was to have both hydrophilicity and hydrophobicity, while also reducing the aggregation tendency of Fe 3 O 4 nanoparticles.…”

“…In addition to doping PVDF‐based materials, researchers [ 122,123 ] have proposed the use of composite materials, including piezoelectric polymer matrices and nanoscale magnetic fillers, to eliminate shortcomings in biocompatibility, mechanical, and other properties. Botvin et al.…”

“…Botvin et al. [ 124 ] used magnetic fillers—magnetite (Fe 3 O 4 ) nanoparticles as fillers and modified the surface of the fillers with citric acid (CA) and oleic acid (OA) modifiers. The effect was to have both hydrophilicity and hydrophobicity, while also reducing the aggregation tendency of Fe 3 O 4 nanoparticles.…”

Electrospun coaxial microfiber‐based water detecting sensor using expansion pressure mechanism

“…The morphology and magnetic properties of the composite magnetoactive scaffolds were controlled by changing the electrospinning conditions. [ 15 ] A profled multi‐pin electrospinning setup is demonstrated to overcome the limitations in the electrospinning like needle clogging, particle settling, and uncontrolled/uneven Taylor cone formation, the requirement of very high voltage and uncontrolled distribution of nanoparticles in nanofbers. [ 16 ] The mixing of polycaprolactone (PCL) and poly(lactic acid) (PLA) can produce a new biodegradable material with well‐balanced properties.…”