Abstract
To study the magnetic heat behaviors, iron oxide nanoparticles (IONPs) and the polyvinylidene fluoride (PVDF) fibrous mats filled with IONPs were prepared by using coprecipitaion method and the electrospinning technique. The synthesized IONPs exhibited a magnetization of about 72 emu/g with average diameter of about 10 nm. The magnetizations of PVDF fibrous mats filled with IONPs showed 2.6 emu/g, 5.5 emu/g and 9.9 emu/g for 5 wt.%, 10 wt.% and 20 wt.% IONPs concentration, respectively. The heat of the magnetic fibrous mats were measured under various alternating magnetic fields (90, 128, and 167 Oe), frequencies (190, 250 and 355 kHz). The maximum saturated temperature showed up to 62 °C for 20 wt.% IONPs filled in PVDF fibrous mat under 167 Oe and 355 kHz.
Highlights
Iron oxide nanoparticles (IONPs) have a high potential for bio-applications such as magnetic resonance imaging contrast enhancement, tissue repair, drug delivery and localized magnetic hyperthermia applications.[1,2,3,4] In general, iron oxide nanoparticles (IONPs) and their colloids have been widely studied in local hyperthermia.[1,2,3,4,5,6,7,8] To apply the hyperthermia treatment, the IONPs should be evenly dispersed throughout the fluid
For polyvinylidene fluoride (PVDF) fibrous mats filled with IONPs concentration, the typical maghemite bands (720 cm−1, 536 cm−1, and 306 cm−1) are dominant with the broadness of peaks due to the mixed magnetic phase of Fe3O4 and γ-Fe2O3,20 which results are comparable to the IONPs after heat treatment
The PVDF fibrous mat without IONPs reveal the peaks at 795 cm−1 and 839 cm−1.21 The magnetite phase is discernible by its main band centered at around 665 cm−1 for as-synthesized IONPs.[20]
Summary
Iron oxide nanoparticles (IONPs) have a high potential for bio-applications such as magnetic resonance imaging contrast enhancement, tissue repair, drug delivery and localized magnetic hyperthermia applications.[1,2,3,4] In general, IONPs and their colloids have been widely studied in local hyperthermia.[1,2,3,4,5,6,7,8] To apply the hyperthermia treatment, the IONPs should be evenly dispersed throughout the fluid It must be shorten treatment time with the controllable loss. The PVDF was employed as a polymeric fibrous matrix for electrospinning, 2158-3226/2016/6(5)/055907/6
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