聚合物辅助沉积法制备导电玄武岩纤维

Preparation of conductive basalt fibers through polymer assisted deposition method

为进一步解决玄武岩纤维因绝缘性导致其应用领域受限的问题,本研究采用聚合物辅助金属沉积法在玄武岩纤维表面化学镀镍金属层制备导电玄武岩纤维。以盐酸L-半胱氨酸(L-H-Cys)溶液处理经酸化后的玄武岩纤维,并经化学镀方法在其表面沉积镍层以制备导电功能玄武岩纤维。采用SEM、FTIR、XRD及电阻测试等实验手段对镀镍后的玄武岩纤维的微观结构、物相结构、附着力、导电性进行了评价表征。实验结果显示,纤维表面镍薄膜由致密的球形颗粒组成,电阻值为14.2Ω/cm(电阻率1.9×10^(-3)Ω·cm),且经三次冷热循环处理后,镀镍玄武岩纤维仍具有较好的导电性,电阻值为15.8Ω/cm,相应电阻率为2.1×10^(-3)Ω·cm,这也表明所制备的镀镍玄武岩纤维具有较高的镀层附着力和良好的导电性能,在纤维增强屏蔽复合材料领域具有广阔的应用前景。

The insulating properties of basalt fiber(BF)restrict its application in many fields.In order to further solve the problem,a nickel coating was successfully deposited on the basalt fiber surface by using electroless plating through polymer assisted metal deposition method.In this study,acidified basalt fibers were treated with L-cysteine hydrochloride(L-H-Cys)solution,and nickel layer was deposited on the surface of basalt fibers by electroless plating to prepare conductive functional basalt fibers.The microstructure,phase structure,adhesion and electrical conductivity of the Ni plated BF were evaluated by SEM,FTIR,XRD and electrical resistance measurements.Experimental results indicate that the nickel film consisting of dense of spherical particle and the resistance value is 14.2Ω/cm(resistivity of 1.9×10^(-3)Ω·cm).Even after three times of thermal cycling treatment,the nickel plated fiber still has satisfactory conductivity and its resistance value is 15.8Ω/cm,which corresponds to resistivity of 2.1×10^(-3)Ω·cm.The prepared composite fibers possess high plated layer adhesion and good electrical conductivity and present promising application prospects in the field of fiber-reinforced electromagnetic shielding composites.