ABS塑料小件化学镀银及银层氯化的研制.docx

【工艺开发】ABS塑料小件化学镀银及银层氯化的研制赵秋蓉，张慧茹*（上海大学复合材料研究中心，上海200072）摘要：在H2SO4/H2O2混合液中对ABS塑料进行表面粗化，然 后进行化学镀银，再用FeCl3溶液氯化镀银层，制备出心电图仪(ECG)用一次性Ag/AgCl电极。研究了活化时间和装载量对化 学镀银增重及电阻的影响。采用扫描电镜(SEM)和X射线衍射 (XRD)技术分析了镀层的表面形貌和物相组成，分别用四探针法和冷热循环法测试了镀层表面的方块电阻及镀层与基体的结合力。结果表明，粗化处理后的ABS塑料表面粗糙度增大，亲 水性增加。适宜的活化时间和化学镀银装载量分别为 5 min和 80 cm2/L。此条件下制备的化学镀银层均匀致密，与基体的结合 力强。氯化前后镀银层的导电性均良好，表面方块电阻分别为30m?/□和53.6m?/□。测得Ag/AgCl心电电极的交流阻抗≤3 k?，直流失调电压≤100 mV，内部噪音≤150 μV，模拟除颤恢复≤3k?， 偏置电流耐受度≤100mV，符合国家医药行业YY/T0196–2005标准。 关键词：丙烯腈–丁二烯–苯乙烯共聚物；塑料；化学镀银；银/氯化银电极；粗化；活化；方块电阻；心电图仪 中图分类号：TQ153.16文献标志码：A文章编号：1004 – 227X (2014) 20 – 0874 –04Research and preparation of electroless silverplating ontinyABSplasticpiecesandchloridizationofthesilver coating // ZHAO Qiu-rong, ZHANGHui-ru*Abstract: The surface of ABS plastic was roughenedinH2SO4/H2O2 mixture solution, and then deposited withsilverby electroless plating method. The electroless silvercoatingwas chloridized in FeCl3 solution to prepare adisposableAg/AgClelectrodeforelectrocardiograph(ECG).Theeffectsof activation time and loading capacity on weight gainandsheet resistance of the electroless silver coating werestudied.The surface morphology and phase composition of thesilvercoatingwereanalyzedbyscanningelectronmicroscopy(SEM) and X-ray diffraction (XRD). The sheet resistanceofthe silver coating and its adhesion to the substrateweredetermined by four-point probe method and hot-coldcyclingtest, respectively. It was found that rougheningtreatment收稿日期：2014–06–26修回日期：2014–07–22基金项目：国家自然科学基金。 作者简介：赵秋蓉（1990–），女，四川绵阳人，在读硕士研究生，主要研究方向为化学镀银、银防护。通信作者：张慧茹，博士，高级工程师，(E-mail)zhanghuiru@shu.edu.cn。increases the surface roughness and hydrophilicity ofABSplastic. The suitable activation time and loading capacityforelectroless silver plating is 5 min and 80 cm2/L, respectively.The silver coating obtained under these conditionsisuniform, compact, and well-adhered to the substrate.Thesilver coating has a sheet resistance of 30 m?/□beforechloridization and 53.6 m?/□ after chloridiza