Magnetic nanofibers with core (Fe3O4 nanoparticle suspension)/sheath (poly ethylene terephthalate) structure fabricated by coaxial electrospinning
Magnetic nanofibers with core (Fe3O4 nanoparticle suspension)/sheath (poly ethylene terephthalate) structure fabricated by coaxial electrospinning
复制标题
DOI：
10.1016/j.jmmm.2011.03.004
复制
发表时间：
2012-03
影响因子：
2.7
通讯作者：
Yun Kyung Sung;B. Ahn;T. Kang
中科院分区：
文献类型：
--
作者：
Yun Kyung Sung;B. Ahn;T. Kang
一维磁性纳米结构由于其独特的体积和粒子形态所无法实现的特性，近年来引起了人们的广泛关注。这些纳米结构在超高密度数据存储、传感器和防弹背心方面具有潜在的应用价值。在共混型磁性纳米纤维中，由于磁性颗粒滞留在固体聚合物基体中，因此磁性颗粒不能沿外加磁场完全排列。为了提高磁性颗粒的迁移率，我们使用了具有良好迁移率和分散性的磁流变液（MRF）。采用同轴静电纺丝技术，以磁流变纤维和聚对苯二甲酸乙酯（PET）溶液为原料制备了超顺磁芯/鞘复合纳米纤维。同轴静电纺丝适于制造芯/护套纳米纤维，将磁流变材料封装在聚合物护套内。磁流变场中的磁性纳米粒子分散在纳米纤维的核心部分。磁性复合纳米纤维在室温下表现出超顺磁性，磁流变液中的磁性纳米颗粒对外加磁场有良好的响应。在磁场作用下，纳米纤维的力学性能得到了改善。本研究旨在利用同轴静电纺丝技术制备芯/鞘磁性复合纳米纤维，并对复合纳米纤维的磁性和力学性能进行表征。
One-dimensional magnetic nanostructures have recently attracted much attention because of their intriguing properties that are not realized by their bulk or particle form. These nanostructures are potentially useful for the application to ultrahigh-density data storages, sensors and bulletproof vest. The magnetic particles in magnetic nanofibers of blend types cannot fully align along the external magnetic field because magnetic particles are arrested in solid polymer matrix. To improve the mobility of magnetic particles, we used magneto-rheological fluid (MRF), which has the good mobility and dispersibility. Superparamagnetic core/sheath composite nanofibers were obtained with MRF and poly (ethylene terephthalate) (PET) solution via a coaxial electrospinning technique. Coaxial electrospinning is suited for fabricating core/sheath nanofibers encapsulating MRF materials within a polymer sheath. The magnetic nanoparticles in MRF were dispersed within core part of the nanofibers. The core/sheath magnetic composite nanofibers exhibited superparamagnetic behavior at room temperature and the magnetic nanoparticles in MRF well responded to an applied magnetic field. Also, the mechanical properties of the nanofiber were improved in the magnetic field. This study aimed to fabricate core/sheath magnetic composite nanofibers using coaxial electrospinning and characterize the magnetic as well as mechanical properties of composite nanofibers.