Huang Weilong, Liu Bin, Chen Zhipeng, Wang Hongjian, Ren Lei, Jiao Jiaming, Zhuang Lin, Luo Jie, Jiang Lelun
School of Engineering, Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, Sun Yat-Sen University, Guangzhou 510006, China.
School of Physics, Sun Yat-Sen University, Guangzhou 510275, China.
Nanomaterials (Basel). 2017 Sep 17;7(9):277. doi: 10.3390/nano7090277.
Magnetic nanofiber has been widely applied in biomedical fields due to its distinctive size, morphology, and properties. We proposed a novel needleless electrospinning method to prepare magnetic nanofibers from the self-assembling "Taylor cones" of poly(vinyl pyrrolidone) (PVP)/Fe₃O₄ ferrofluid (PFF) under the coincident magnetic and electric fields. The results demonstrated that a static PFF Rosensweig instability with a conical protrusion could be obtained under the magnetic field. The tip of the protrusion emitted an electrospinning jet under the coincident magnetic and electric fields. The needleless electrospinning showed a similar process phenomenon in comparison with conventional electrospinning. The prepared nanofibers were composed of Fe₃O₄ particles and PVP polymer. The Fe₃O₄ particles aggregated inside and on the surface of the nanofibers. The nanofibers prepared by needleless electrospinning exhibited similar morphology compared with the conventionally electrospun nanofibers. The nanofibers also exhibited good ferromagnetic and magnetic field responsive properties.
磁性纳米纤维因其独特的尺寸、形态和性能，已在生物医学领域得到广泛应用。我们提出了一种新型的无针静电纺丝方法，用于在同时存在磁场和电场的情况下，从聚（乙烯基吡咯烷酮）（PVP）/Fe₃O₄铁流体（PFF）的自组装“泰勒锥”制备磁性纳米纤维。结果表明，在磁场作用下可获得具有锥形突起的静态PFF罗森斯韦格不稳定性。在磁场和电场同时作用下，突起的尖端会发射出静电纺丝射流。与传统静电纺丝相比，无针静电纺丝表现出类似的过程现象。制备的纳米纤维由Fe₃O₄颗粒和PVP聚合物组成。Fe₃O₄颗粒聚集在纳米纤维内部和表面。与传统静电纺丝制备的纳米纤维相比，无针静电纺丝制备的纳米纤维表现出相似的形态。这些纳米纤维还表现出良好的铁磁性和磁场响应特性。
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