【作者】 吴楠； 王应德；

【Author】 Nan Wu;Yingde Wang;Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology;

【机构】 国防科技大学新型陶瓷纤维及其复合材料重点实验室；

【摘要】 Si OC陶瓷具有优异的机械性能和化学稳定性,在催化剂载体1、锂离子电池阳极材料2、传感器以及高温过滤3方面展现出巨大应用潜力。纳米或亚微米级Si OC纤维因其较高的比表面积和孔隙率备受关注。我们通过先驱体转化法,以聚碳硅烷(PCS)为先驱体,聚苯乙烯为助纺剂,经过静电纺丝和高温热解,制备出富碳的Si OC亚微米纤维。调整PCS在纺丝液中浓度,制备出纤维直径为505~875 nm的Si OC纤维。纤维毡强度可达8.9MPa,并展现出优异的亲水性能。经测试,纤维在500℃空气和酸碱溶液中具有良好的稳定性。更多还原

【Abstract】 Owing to their excellent thermal, chemical and mechanical properties, Si OC ceramics have recently demonstrated many potential applications on catalyst supports, lithium ion battery anodes, sensors, filters, hydrogen storage materials, radiation-tolerant materials, etc. Si OC fibers, especially nano or sub-mirco fibers, have received much attention due to their high surface-to-volume ratio and large surface area. C/Si OC sub-micrometer fibers with average diameter of 505 to 875 nm were successfully prepared by electrospinning of different concentration PCS/PS solution, followed by pre-oxidation and carbonization. The C/Si OC fibers display enhanced thermal stability at 500℃ in air and excellent chemical resistance.更多还原