Optimization of Solution Parameters in Preparing SiC Nanofibers by Electrospinning
CHEN Ying1, HOU Yi2,3, CHENG Laifei2
1 Honors College, Northwestern Polytechnical University, Xi'an 710072 2 School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072 3 Temasek Laboratories, National University of Singapore, Singapore 117411
Abstract: One dimensional SiC nano-materials not only hold high strength and modulus, exceeding chemical stability and high temperature resistance, but also bear large specific surface area, controllable microstructure and dielectric properties, which enable the exceptional application value of 1D SiC nano-materials in the sector of electromagnetic absorption. Electrospinning is generally recognized as an effective approach to fabricate continuous SiC nanofibers. At present, the preparation of SiC ceramic fibers by electrospinning is still in the preliminary stage of exploration, there is a confusion in adaptable spinning solutions and their parameters, as well as a lack of systematic study, especially in optimization of solution aiming at preparing nanoscale SiC fibers by electrospinning. In this study, we took the polycarbosilane (PCS) solution, the precursor for electrospun SiC nanofibers, as research object, analyzed the effects of the kinds of solvents, type and concentration of polymer spinning aid, ratio and viscosity of the solution, types and amounts of additives on the morphology and microstructure systematically. Accordingly, we confirmed the sa-tisfactory solvent-spinning aid-additive system that include solvent chloroform, spinning aid polycaprolactone (PCL) and addictive hafnium acetone (Hf(acac)4). To prepare nanoscale SiC fibers with continuous microstructure and uniform morphology, the optimal concentration of PCL was 0.087 5 g/mL, the concentration range of PCS was 0.125—0.15 g/mL, and the addition amount of Hf(acac)4 should not exceed 0.025 g/mL. Consequently, the flexible SiC nanofibers with the average diameter of 340 nm were successfully obtained after optimization of spinning solution.
作者简介: 陈莹,2016年3月毕业于西北工业大学生命学院,获得工程硕士学位。于2016年4月至今在西北工业大学教育实验学院工作,主要从事多孔钛合金植入材料及其力学适配机制、SiC基纳米纤维材料研究。在Journal of the Mechanical Behavior of Biomedical Materials期刊发表论文一篇。侯翼,新加坡国立大学淡马锡实验室,助理科学家。2013年9月至今在西北工业大学在读博士,2018年10月加入新加坡国立大学淡马锡实验室工作至今,主要从事SiC基纳米纤维材料的制备工艺研究和功能化应用,磁性材料在低频电磁吸波/屏蔽领域的应用。在ACS Applied Materials & Interfaces、Journal of the European Ceramic Society、Ceramic International等国外重要期刊发表论文6篇,申报发明专利4项。
引用本文:
陈莹, 侯翼, 成来飞. 针对静电纺丝SiC纤维纳米化的溶液参数优化设计[J]. 材料导报, 2019, 33(10): 1619-1623.
CHEN Ying, HOU Yi, CHENG Laifei. Optimization of Solution Parameters in Preparing SiC Nanofibers by Electrospinning. Materials Reports, 2019, 33(10): 1619-1623.
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2019, Vol. 33 
