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为增加尼龙基体和银镀层之间的界面结合力,将机械打磨引入到传统的化学镀工艺中,并利用无毒、环保的葡萄糖溶液作为施镀过程中的还原剂,代替传统化学镀中常用的甲醛溶液,快速制备了尼龙6/银复合材料。利用X射线衍射(XRD)、扫描电子显微镜(SEM)分别对尼龙6/银复合材料的物相及显微形貌进行了表征;并研究了化学镀工艺对施镀过程的影响,着重研究了施镀温度、施镀时间、硝酸银溶液(主盐)浓度及葡萄糖溶液(还原剂)浓度对银镀层厚度的影响。结果表明,银镀层的厚度随着硝酸银浓度、葡萄糖浓度、施镀时间、施镀温度的升高整体呈先增大后减小的趋势。过高的施镀温度、硝酸银浓度及葡萄糖浓度会使镀液中的还原反应速率过快,不利于银粒子在尼龙6基材上的沉积,从而引起银镀层厚度的下降;过长的施镀时间会使银镀层表面出现很多划痕,从而导致银镀层质量的下降。通过优化施镀工艺参数,得到银镀层厚度可控的尼龙6/银复合材料。 相似文献
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电镀车间所用各种可溶性阳极为铜、锌、镉、银、镍…等阳极板,在施镀过程中阳极金属溶解的同时.杂质以阳极泥形式积累在镀液中,以致影响镀层质量,为此,可溶性电镀阳极板均需置于阳极袋内以防阳极泥进入镀液.通常用于制作阳极袋的材料为涤纶布、漂白布、麻布等一般也只能使用几个月最多一年便需更换.既麻烦又浪费,因此寻求一种耐酸碱腐蚀、经久耐用,且能有效的阻挡阳极泥进入镀液的阳极框(套)材料实属电镀领域一项当务之急。 相似文献
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仿金镀中超声波的作用 总被引:1,自引:0,他引:1
超声波在化学镀尤其是仿金镀方面对操作参数、镀层质量作用很大,但其应用报道甚少.为了找出超声波在化学镀中的一般规律,揭示其对仿金电镀中化学镀镍及Cu2+,Zn2+和Sn2+的沉积机理,考察了超声波对仿金镀活化、化学镀镍、仿金镀电镀过程等各阶段多种因素的影响,包括活化工艺、pH值、电流密度、还原剂用量、配位剂用量等;优化了试验条件.结果显示,仿金镀工艺中引入超声波,降低了施镀的温度,提高了仿金镀的沉积速率.最后详细研究了超声波所产生的超声空化等对沉积速率、镀层质量以及仿金镀其他过程的作用机理. 相似文献
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316不锈钢滤板上钯银合金的脉冲电镀 总被引:2,自引:0,他引:2
研究了氨性溶液中在316不锈钢滤板上脉冲电沉积钯银合金时,电镀条件对镀层组成,表观形貌和金相结构的影响。镀层由钯银合金和少量游离银组成,合金相具有面心立方结构,择优取向为(111)面,镀层银含量随平均电流密度或导通时间的增大而减少,提高镀液中银的浓度有利于获得高银含量镀层。银含量小于26at.%的镀层外观光亮。研究证明钯银合金和银的沉积速率受控于银氨络离子的传质过程。确定了钯银合金选择渗氢膜的电镀 相似文献
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全光亮化学镀镍液的组成优化及寿命研究 总被引:1,自引:0,他引:1
用均匀设计试验优化了镀液组成。用综合指标Z表示镀层质量,试验数据用统计软件处理,在所得到的Z与各因素的回归方程中,标准系数最小的因素对指标的影响最小而被淘汰。用计算机对三元配位体镍磷化学镀体系中的12个可变组成进行逐级淘汰,筛选优化,最后获得仅有7个可变组成的单配位体体系。从该体系中同样镀出了优质的镜面全光亮镍磷镀层。优化后的镀液在镀速和寿命上都有所提高。在此基础上研究了诸因素对镀液寿命及镀速的影响,用正交试验确定了补加液的组成,乳酸和次磷酸钠的补加量对寿命的影响最大,当装载量为1.4dm^2/L时,施镀1h,每升镀液补加O.3mL乳酸,次磷酸钠与镍摩尔比按3.7:1补加,可以使镀液在周期达到10时仍然保持清澈透明,且镀层质量和镜面光亮的外观维持不变,使用周期可以达到15以上。 相似文献
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《材料保护》2005,38(10):21-21
本发明公开了一种含有碳/二硫化钼复合纳米管的复合镀层及其制备方法。采用化学复合镀或复合电沉积制备含有碳/二硫化钼复合纳米管的复合镀层,在化学镀液和电镀液中,含有2~25g/L的碳/二硫化钼复合纳米管。本发明的复合镀层具有高的耐磨性能和自润滑性能。在同等测试条件下,其磨损量为Ni-P镀层的15%~20%,是Ni-P-层状硫化钼复合镀层的25%~30%,是Ni-P-SiC复合镀层的45%~50%,是Ni-P-碳纳米管复合镀层的85%~90%。其摩擦系数只有0.03~0.04,而Ni-P镀层、Ni-P-层状二硫化钼、Ni-P-SiC和Ni-P-碳纳米管复合镀层的摩擦系数分别为0.09~0.10,0.06,0.10和0.06~0.55。本发明方法简单,可以延长金属零件的使用寿命,降低动力消耗,节约能源,有利于环境保护。 相似文献
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电镀时间与镀层光泽度的关系 总被引:1,自引:0,他引:1
1前言电镀时,当镀液的基本成分一定,其镀层质量及镀液性能等便主要决定于添加剂的好坏。添加剂的功能多种多样,影响因素也是多方面的,如镀层质量、镀液的性能、操作条件及镀液的维护等。光亮添加剂必须具备优良的整平性能,较快的出光速度和较高的光亮度。因此,如何... 相似文献
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Muench F Rauber M Stegmann C Lauterbach S Kunz U Kleebe HJ Ensinger W 《Nanotechnology》2011,22(41):415602
A facile electroless plating procedure for the controlled synthesis of nanoscale silver thin films and derived structures such as silver nanotubes was developed and the products were characterized by SEM, TEM and EDS. The highly stable plating baths consist of AgNO(3) as the metal source, a suitable ligand and tartrate as an environmentally benign reducing agent. Next to the variation of the coordinative environment of the oxidizing component, the influence of the pH value was evaluated. These two governing factors strongly affect the plating rate and the morphology of the developing silver nanoparticle films and can be used to adapt the reaction to synthetic demands. The refined electroless deposition allows the fabrication of homogeneous high aspect-ratio nanotubes in ion track etched polycarbonate. Template-embedded metal nanotubes can be interpreted as parallelled microreactors. Following this concept, both the silver nanotubes and spongy gold nanotubes obtained by the use of the silver structures as sacrificial templates were applied in the reduction of 4-nitrophenol by sodium borohydride, proving to be extraordinarily effective catalysts. 相似文献
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Carbon nanotubes (CNTs) have advantages as conductive fillers due to their large aspect ratio and excellent conductivity. In this study, a novel silver/conducting polymer composite was developed by the incorporation of silver-plated CNTs. It is important to achieve a homogeneous dispersion of nanotubes and to improve the interfacial bonding to utilize the excellent properties of reinforcements in the matrix material. The homogeneous dispersion of nanotubes was achieved by an acid treatment process, and the interfacial contact was improved by electroless silver plating around nanotubes. The resistivity of the silver/conducting polymer composite was decreased by 83% by the addition of silver-plated single-walled carbon nanotubes. Conductive bumps were also screen-printed to demonstrate the capability of the composite as electrical interconnects for multi-layer printed circuit boards. 相似文献
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Preparation of copper nanoparticles on carbon nanotubes by electroless plating method 总被引:1,自引:0,他引:1
Densely distributed copper nanoparticles have been deposited on the surface of carbon nanotubes with a size of ∼10 nm by the electroless plating method. It has been found that the pretreatment of the carbon nanotubes is very important to obtain the copper nanoparticles on the carbon nanotubes; in our experiments, one-step pretreatment of mixed HNO3 and H2SO4 was found effective. In order to attain nanosized copper particles, the electroless plating parameters should be closely controlled; e.g., the pH value of the plating solution, the temperature, and the concentration and titrating speed of HCOH were critical. 相似文献
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碳纳米管的化学镀Au研究 总被引:12,自引:0,他引:12
采用化学镀法首次在碳纳米管表面包覆了贵金属Au,研究了工艺过程对包覆层质量的影响,并利用高分辨透射电镜(HRTEM)及纳米束EDS能谱对包覆的碳纳米管进行了表征.所得包覆层完整、均匀、金属颗粒密度高,可望作为高性能准一维纳米导线得到应用. 相似文献