摘要
尽管聚合物纤维基电磁屏蔽材料因其优异的柔韧性已广泛应用于可穿戴屏蔽器件领域,但是如何通过结构设计和工艺优化获得高效的屏蔽纤维仍是一个巨大挑战。基于此,利用磁控溅射工艺在静电纺丝制备的聚乙烯醇纤维表面均匀沉积镍层。当磁控溅射时间为50 min时,该材料的导电率和饱和磁化强度分别为47.7 S/cm和16.1 emu/g。由于优异的导电性能和磁性能,对于X波段的电磁波,厚度为1.67μm镍修饰的聚乙烯醇纤维膜的电磁屏蔽效能为16 dB,比屏蔽效能(屏蔽效能与厚度之比)为9.6×10^(4) dB/cm。通过屏蔽机理分析可知,该材料是以反射为主的屏蔽材料。制备的纤维膜在屏蔽服、可穿戴电子器件等领域具有潜在的应用前景。
Polymer based electromagnetic interference shielding fibers have been applied in the field of wearable shielding devices because of their excellent flexibility.However,it is a tremendous challenge to fabricate fibers with high-performance by structural design and process optimization.Herein,by employing magnetron sputtering approach,nickel coating was decorated uniformly on the surface of poly(vinyl alcohol)(PVA)fiber film which were obtained via electrostatic spinning process.When sputtering time is 50 min,the electrical conductivity and saturation magnetization of poly(vinyl alcohol)/nickel(PVA/Ni)film are up to 47.7 S/cm and 16.1 emu/g,respectively.The excellent conductive properties and magnetic properties endow the resultant PVA/Ni film with the outstanding shielding effectiveness(16.0 dB)and high specific shielding effectiveness(the ratio of shielding effectiveness and thickness)of 9.6×10^(4)dB/cm in the frequency of X band.The reflection efficiency is the key factor in the shielding mechanism of PVA/Ni film.The resultant PVA/Ni films have the potential application prospects in the field of shielding clothing and wearable electron device.
作者
谢倩
郝雪卉
赵利民
胡煦煦
战艳虎
李玉超
XIE Qian;HAO Xuehui;ZHAO Limin;HU Xuxu;ZHAN Yanhu;LI Yuchao(School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252059,China)
出处
《聊城大学学报（自然科学版）》
2023年第3期50-55,63,共7页
Journal of Liaocheng University:Natural Science Edition
基金
国家自然科学基金项目(52103054,52177020)资助。
关键词
电磁屏蔽
磁控溅射
静电纺丝
聚乙烯醇
electromagnetic shielding
magnetron sputtering
electrostatic spinning
poly(vinyl alcohol)
