Controlled nanofibers morphology and its influence on magnetic properties by electrospinning
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Controlled nanofibers morphology and its influence on magnetic properties by electrospinning Chen Cheng1 · Jianfeng Dai1,2 · Wei Feng1 · Zengpeng Li2 · Xinchao Wen1 Received: 28 July 2020 / Accepted: 20 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this paper, different forms of fibers can be obtained by adjusting the rotating speed of the collecting cylinder. This is due to the centripetal force generated by the collecting cylinder when the precursor colloid is on the collecting drum, which makes the diameter of nanofibers change significantly, thus forming different nanofibers and nanobelts. The average diameter of nanofibers increased from 0.09 μm to 0.79 μm, and finally decreased to 0.17 μm. The results show that the morphology of nanofibers also has a significant effect on the magnetic properties of the materials, which is due to the interaction of domain rotation and fiber crystallization. The coercivity of nanoribbons is 1145.39 Oe. The research in this field is of great significance to the industrial production of nanofibers and the morphology and application of nanofibers. Keywords Electrospinning · Fibre technology · Magnetic properties · Morphology
1 Introduction With the progress of science and technology, cobalt ferrite is known as a promising material because of its unique properties, low production cost, good mechanical hardness, high coercivity, different applications in electrical and optoelectronic devices, and significant resistance and low eddy current loss [1–3]. At the same time, with the development of the times, the miniaturization and lightweight of equipment has gradually become the mainstream of development, which further promotes the development of nanofibers [4, 5]. Traditional nanofibers are mainly prepared by photolithography [6], precipitation [7], template growth [8] or external magnetic field control [9]. These methods are difficult to prepare nanofibers due to their complex equipment or high cost. Electrospinning has become the main method of nanofibers because of its simple equipment, low cost, controllable fiber diameter and preparation of oriented nanofibers. Electrospinning equipment seems simple, but to obtain * Jianfeng Dai [email protected] 1
School of Science, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
State Key Laborotary of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
2
ideal structure of nanofibers, the influencing factors include flow field, electrostatic field and mechanics [10, 11]. In recent years, researchers have studied the influence of electrospinning process parameters on the properties of fibers. As per Huang et al., humidity is used to control the morphology of electrospun nanofibers [12]. In addition, Szewczyk [13] and Chen [14], respectively, studied the preparation methods of spider web and spring-like nanofibers. At present, the use of electrospinning equipment, especially the prepara
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