镀银SiO_2纳米纤维的制备及其导电性能的研究  

Preparation and electrical conductivity of silver-plated SiO_2 nanofiber

作　　者：苏玉仙 王博伦[1] 张梦琪 李俊涛 张继川[1] 袁重阳[3] 王晓燕[3] 刘力[1] 温世鹏[1] Su Yuxian;Wang Bolun;Zhang Mengqi;Li Juntao;Zhang Jichuan;Yuan Chongyang;Wang Xiaoyan;Liu Li;Wen Shipeng(Beijing Engineering Research Centre of Advanced Elastomers,Beijing University of Chemical Technology, Beijing 100029;Quality Inspection and Technical Angency of Jizhou District,Hengshui 053200;School of Stomatology,Peking University,Beijing 100081)

机构地区：[1]北京化工大学北京市先进弹性体工程技术研究中心,北京100029 [2]河北省衡水市冀州区综合检验检测中心,河北衡水053200 [3]北京大学口腔医院,北京100081

出　　处：《合成纤维工业》2018年第6期16-20,共5页China Synthetic Fiber Industry

基　　金：国家自然科学基金资助项目(51573007;51503004);中央高校基本科研业务费资助项目(JD1805)

摘　　要：利用纳米二氧化硅(SiO_2)的结构特性,将其作为镀银基体材料,结合静电纺丝技术制备了SiO_2纳米纤维,进一步在其表面沉积多巴胺,再采用硝酸银(Ag NO3)进行镀银处理,得到了镀银SiO_2纳米纤维,研究了镀银SiO_2纳米纤维的表面形貌、结晶结构及导电性能。结果表明:表面沉积多巴胺后的SiO_2纳米纤维有利于接下来的镀银处理,能够在纤维表面形成形貌良好的银纳米粒子镀层;随着Ag NO3浓度的增加,镀银SiO_2纳米纤维的电阻率呈下降趋势,当AgNO_3浓度达到10 g/L时,纤维电阻率下降至0. 1 mΩ·cm,并趋于稳定,纤维表面形成均匀致密的银纳米粒子镀层,具有良好的导电性能。Nano-silicon dioxide(SiO 2)was used nano-SiO 2 as a carrier for silver plating due to its proper structural characteristics to prepare SiO 2 nanofiber via electrospinning technique.Furthermore,silver-plated SiO 2 nanofibers were obtained by depositing dopamine on the surface of SiO 2 nanofiber prior to silver plating with silver nitrate(AgNO 3).The surface morphology,crystalline structure and electrical conductivity of silver-plated SiO 2 nanofiber were studied.The results showed that the deposition of dopamine on the surface of SiO 2 nanofibers was beneficial to the subsequent silver plating process and helped form a silver nanoparticles layer with favorable morphology on the fiber surface;the resistivity of silver-plated SiO 2 nanofibers appeared a downward tendency with the increase of AgNO 3 concentration,and dropped to 0.1 mΩ·cm and then tended to be stable as the AgNO 3 concentration reached 10 g/L;at the same time,the fiber acquired a favorable conductivity because a uniform and dense silver nanoparticle layer formed on the fiber surface.

关 键 词：二氧化硅 静电纺丝 纳米纤维 镀银 导电性能 

分 类 号：TQ342.8[化学工程—化纤工业]