1.上海大学，理学院，上海 200444;2.上海大学，材料科学与工程学院，上海 200444;3.东南大学 机械工程学院, 南京 211189
李敏娜（1997—），女，硕士研究生，主要从事功能材料研究，(E-mail)liminna@shu.edu.cn。
白瑞成，男，研究员，主要从事复合材料研究，(E-mail)rcbai@shu.edu.cn；
TQ342.8
国家自然科学基金青年基金(51803116, 21908142)。
1.a. College of Science; 1b. College of Materials Science and Engineering , Shanghai University, Shanghai 200444, P. R. China; 2. College of Mechanical Engineering, Southeast University, Nanjing 211189, P. R. China
Supported by National Natural Science Foundation of China (51803116, 21908142).
采用高性能Kevlar?织物作为基体，使用无刻蚀、无钯、无锡的“溶胀-银”方法进行活化，通过化学镀工艺制备Ni@Kevlar?织物。利用扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HRTEM)观察织物表面及纤维截面的微观形貌，探究不同时间下样品的质量增加率、增厚及面密度，并利用X射线光电子能谱仪(XPS)和广角X射线衍射仪(WXRD)测量表面成分及晶体结构，采用四探针测试仪和综合物理性能测量系统(PPMS)测量电、磁性能。结果表明，无刻蚀、无钯、无锡的“溶胀-银”活化处理能在织物表面产生大量的银催化靶点，经化学镀后可得到具有良好导电性和铁磁性的纯镍镀层。同轴法屏蔽效能测试结果表明，Ni@Kevlar?织物在低频波段(0.1 MHz~ 1.5 GHz)的屏蔽值最高达70 dB，能屏蔽99.999 99%的电磁波，高频波段(2~18 GHz)达到25 dB，可满足生活生产的屏蔽需求。
Ni@Kevlar? fabric was prepared by electroless plating process using high performance Kevlar? fabric as substrate and activated by etchant-free, palladium-free, and tin-free swelling-silver pretreatment. SEM and HRTEM were used to observe the morphology of the fabric and the cross section of the fiber. The mass gain, thickness and areal density of the samples at different plating time were investigated. The composition and structure of different Ni@Kevlar? fabrics were measured by EDS, XPS and WXRD. The electrical and magnetic properties of the materials were measured by four-probe tester and PPMS. Results showed that the exploitation of etchant-free, Pd-free, tin-free swelling-silver activation was very simple and efficient to fix massive silver seeds into the fiber matrix and facilitate the ensuing electroless Ni plating process with maintenance of the remarkable properties of the Kevlar? fabric, and exerted positive influence over the adhesion between the fiber matrix and the subsequent pure Ni nano-crystalline layer. Coaxial electromagnetic shielding test results demonstrated the excellent shielding effectiveness (up to 70 dB) at low-frequency band (0.1 MHz~1.5 GHz) and the fair shielding effectiveness (up to 25 dB) at high-frequency band (2~18 GHz), which could well meet the electromagnetic shielding needs of life and production.
李敏娜,张蕾蕾,李晓琳,王莎莎,盛明杰,白瑞成,邵勤思.无钯化学镀制备导电
