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金刚石表面化学镀预处理研究 总被引:17,自引:0,他引:17
针对金刚石表面镀预处理过程中的粗化,亲水处理以及敏化,活化等进行了深入研究。研制了一种强酸性和强氧化性溶胶,对金刚石表面具有极好的亲水和粗化功效。提出了一种盐基性胶体钯配方,对金刚石表面具有良好的敏化活化效果。采用该预处理工艺,能较好地解决金刚石表面化学镀存在的漏镀问题。 相似文献
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《纤维素科学与技术》2017,(4):57-64
综述了织物纤维表面化学镀的前处理进展,重点对除油、粗化以及活化过程作了概括总结,并对新型活化工艺进行了介绍归纳,包括非贵金属活化法、超声活化法、光化学活化法以及自组装薄膜活化法等。简要分析了除油、粗化和活化的各种工艺方法及其原理,并给出采用不同工艺方法施镀成功的代表性案例。鉴于传统的活化工艺对贵金属的消耗量较大,成本较高,为了节约贵金属资源,文中专门对非贵金属活化新工艺作了较详细介绍。最后展望了织物纤维表面化学镀前处理工艺的发展前景。对织物纤维表面化学镀研究工作具有一定参考价值。 相似文献
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采用一种新型无锡活化工艺,即利用乙二醇作还原剂直接使Pd2+被还原成Pd0而沉积在基体上,实现了对γ-Al2O3粉体的活化.将活化后的γ-Al2O3粉体加入到两种钯镀液中,成功实现了γ-Al2O3粉体上的化学镀钯.研究了活化的机理以及化学镀前后γ-Al2O3粉体结构与表面形貌的变化,结果表明通过新型化学镀方法制备出的镀钯粉体1-Pd/Al2O3中钯粒子的粒径在20-30nm,并且粒径大小分布均匀.新型无锡活化工艺与传统的化学镀活化工艺相比,活化过程中无锡离子干扰,并且活化在中性条件下进行,基体不受损坏. 相似文献
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研究了玻璃纤维表面化学镀Cu-Co-P合金的操作方法、工艺条件及各种因素对镀层质量的影响.实验结果表明,玻璃纤维经过预处理及敏化、活化处理,化学镀Cu-Co-P合金pH值在7.0,镀液温度72℃,反应时间30min,镀层质量较好. 相似文献
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玻璃表面化学镀Co-Ni-P合金的研究 总被引:1,自引:0,他引:1
实验研究了玻璃基体表面化学镀Co-Ni-P合金的工艺过程和操作方法.讨论了镀液pH值及其他因素对镀层质量的影响.并对玻璃镀件进行了电镜扫描、X射线衍射、结合力和耐腐蚀性检测.实验结果表明:玻璃基体经过预处理、敏化及活化处理.镀液条件控制在80℃、pH为6、施镀时间40min进行化学镀合金,可以得到结合力较强、质量较好的Co-Ni-P合金镀层. 相似文献
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采用化学镀方法制备了Ni包覆碳纳米管(CNTs),利用红外光谱(IR)、场发射扫描电镜(FESEM)、能谱分析(EDS)以及X射线衍射分析(XRD)研究了混酸纯化、敏化活化、化学镀Ni工艺以及镀后热处理(HT)对化学镀的影响.结果表明:混酸纯化后CNTs在其表面形成了大量的羧基(-COOH)和羟基(-OH)等官能团,提高了CNTs在镀液中的分散性;当稳定剂NH4Cl为35 g/L时,随着镀液温度的升高,镀层Ni含量先升高后降低;当温度为85℃时,镀Ni效果最佳,镀层Ni的质量分数为69.05%;热处理后镀层由非晶态的Ni-P层转变为Ni3P晶态结构,镀层更加平滑致密. 相似文献
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纳米碳纤维化学镀镍-铁-钴-磷合金镀层 总被引:2,自引:1,他引:1
在铁片试样上研究了化学镀Ni-Fe-Co-P合金镀层的工艺,利用此工艺在经过敏化、活化处理后的纳米碳纤维表面沉积出Ni-Fe-Co-P合金镀层。采用能量色散X射线谱(EDS)分析得出镀层成分,利用扫描电子显微镜(SEM)观察镀层形貌。结果表明,镀层的沉积速率随镀液中氯化镍质量浓度的增加而增加,随硫酸钴质量浓度的增加而降低;通过控制镀液中c(Co2 )/c(Ni2 )的比值,可控制沉积速率及镀层中镍、钴元素的相对含量;镀后的纳米碳纤维分散性好,获得了连续、均匀的Ni-Fe-Co-P合金镀层。 相似文献
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A simple chemical method was employed to coat carbon nanotubes with a layer of copper. Due to the hydrophobic nature, large surface curvature, small diameter and large aspect ratio, it is difficult to gain continuous electroless plating layer on the surface of carbon nanotubes. In this paper, a series methods (oxidization, sensitization and activation) are used to add active sites before electroless plating, and the adjustment of the traditional composition of copper electroless plating bath and operating condition can decelerate electroless plating rate. The samples before and after coating were analyzed using transmission electron microscopy and energy-dispersive X-ray spectroscopy. The results showed that the surface of carbon nanotubes was successfully coated with continuous layer of copper, which lays a good foundation for applying carbon nanotubes in composites. 相似文献
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基于化学镀技术在涤纶织物表面进行了化学镀Ni-Co-Fe-P处理.在单因素实验的基础上对化学镀工艺进行了正交实验设计,筛选出沉积速率高、稳定性好的工艺配方.采用扫描电子显微镜(SEM)、X射线能谱仪(EDS)对镀层形貌、组分进行表征,并对镀后织物的电磁波屏蔽效能进行测定.结果表明:在缓冲剂的质量浓度为14 g/L,镀覆... 相似文献
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采用以甲醛为还原剂的化学镀铜液,用硝酸银作活化剂,在碳纤维布表面沉积出连续、均匀、有光泽的化学镀铜层。研究了不同前处理工艺对碳纤维布化学镀铜的影响。采用扫描电子显微镜表征了化学镀铜层的表面形貌,并用数字电压表测试了碳纤维布化学镀铜前后的导电性。 相似文献
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Electroless Plating of Carbon Nanotubes with Copper 总被引:1,自引:0,他引:1
A simple chemical method was employed to coat carbon nanotubes with a layer of copper. Due to the hydrophobic nature, large surface curvature, small diameter and large aspect ratio, it is difficult to gain continuous electroless plating layer on the surface of carbon nanotubes. In this paper, a series methods (oxidization, sensiti-zation and activation) are used to add active sites before electroless plating, and the adjustment of the traditional composition of copper electroless plating bath and operating condition can decelerate electroless plating rate. The samples before and after coating were analyzed using transmission electron microscopy and energy-dispersive X-ray spectroscopy. The results showed that the surface of carbon nanotubes was successfully coated with continuous layer of copper, which lays a good foundation for applying carbon nanotubes in composites. 相似文献
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本文将碳化硅经过预处理(除油-粗化-敏化-活化-还原)后分别在不同的pH值(9、10、11)的镀液中进行化学镀钴,镀液温度为80℃,施镀时间为60 min。研究镀液的不同pH值对试样电磁屏蔽效能的影响。结果表明:镀液的pH值为10时获得的镀钴碳化硅,在11GHz屏蔽效能达到最大,其值为8.4dB。 相似文献
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In this study, an alternative Pd activation process was developed for electroless Ni plating on polyester fabric modified with a self‐assembled monolayer (SAM) of 3‐aminopropyltrimethoxysilane (APTMS). The presence of a highly oriented amino‐terminated SAM and the formation of Pd‐activated APTMS were demonstrated by X‐ray photoelectron spectroscopy analysis. After activation, electroless Ni plating was successfully initiated, and the Ni coating was deposited onto the surface of the polyester fibers. The resulting Ni coating was examined by scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and X‐ray diffraction. The electromagnetic interference (EMI) shielding effectiveness (SE) and adhesive strength of the Ni‐plated polyester fabric were evaluated. On the basis of the experimental results, the Ni coating produced with a Pd‐activated SAM was uniform and dense. As the Ni weight on the treated fabric was 32 g/m2, the EMI SE of the Ni‐plated polyester fabric modified with APTMS obtained was more than 30 dB at frequencies that ranged from 2 to 18 GHz. Compared with the conventional two‐step activation method, Ni coating on the Pd‐activated polyester fabric modified with APTMS improved the coating adherence stability. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献
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粉体表面化学镀的研究进展 总被引:4,自引:0,他引:4
对粉体进行化学镀具有重要的学术意义和广阔的应用前景。介绍了粉体化学镀的优点及特点,敏化活化一步法和敏化活化两步法两种预处理工艺及各自的优缺点,并较全面地对目前国内外正在研究的微米级、纳米级粉体化学镀进行了评述和讨论。 相似文献
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