| 半胱氨酸亚金钠的理化性质及化镍金工艺研究 |
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| 引用本文： | 刘慧敏,盛国军,李德良,黄世玉,刘慎,杨焰.半胱氨酸亚金钠的理化性质及化镍金工艺研究[J].表面技术,2015,44(7):6-10,33. |
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| 作者姓名： | 刘慧敏 盛国军 李德良 黄世玉 刘慎 杨焰 |
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| 作者单位： | 1. 中南林业科技大学 环境科学与工程学院,长沙,410004;2. 中南林业科技大学 环境科学与工程学院，长沙410004; 中南林业科技大学 材料科学与工程学院，长沙410004;3. 中南林业科技大学 材料科学与工程学院,长沙,410004 |
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| 基金项目： | 国家自然科学基金资助项目，湖南省自然科学基金资助项目(07JJ6156) Fund:Supported by the National Natural Science Foundation of China，Natural Science Foundation of Hunan Province |
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| 摘 要： | 目的合成一种新型水溶性亚金配合物,并分析其应用于无氰镀金的可行性。方法以氯金酸为金液、半胱氨酸为配体,在弱碱性条件下合成半胱氨酸亚金钠,通过元素分析仪、红外光谱仪、紫外可见光谱仪、热重分析仪、电导率仪研究其理化性质。以温度、p H值和金质量浓度为变量,通过单因素试验分析它们对镀金的影响,通过正交试验获得适宜的镀金工艺条件。结果该产物的分子式为Na Au(Cys)2。该配合物的结构中,半胱氨酸里巯基和亚金进行配位并形成了很强的配位键,该配合物的特征吸收波长范围在205~210 nm。差热曲线和电导率值测定结果显示,该配合物在170℃以前的热稳定性较好,是典型的离子化合物。最佳的镀金工艺参数为:p H=2,金质量浓度2 g/L,温度45℃。在该条件下,镀层的结合力好,镀速可控,镀金效果良好。结论合成了新型水溶性亚金配合物,其理化性质稳定,有望用于无氰镀金工业领域。
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| 关 键 词： | 亚金配合物 半胱氨酸 合成 理化性质 化镍金 |
| 收稿时间： | 2015/1/27 0:00:00 |
| 修稿时间： | 2015/7/20 0:00:00 |
Physical and Chemical Properties of NaAu(Cys)2·3H2O and Technology Research on Electroless Nichel/Immersion Gold |
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| LIU Hui-min,SHENG Guo-jun,LI De-liang,HUANG Shi-yu,LIU Shen and YANG Yan.Physical and Chemical Properties of NaAu(Cys)2·3H2O and Technology Research on Electroless Nichel/Immersion Gold[J].Surface Technology,2015,44(7):6-10,33. |
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| Authors: | LIU Hui-min SHENG Guo-jun LI De-liang HUANG Shi-yu LIU Shen and YANG Yan |
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| Affiliation: | College of Environmental Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China,College of Environmental Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China,1. College of Environmental Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China;2. College of Material Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China,College of Environmental Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China,College of Material Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China and College of Material Science and Engineering, Central South University of Forest and Technology, Changsha 410004, China |
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| Abstract: | ABSTRACT:Objective To synthesize a novel aurous compound and to analyze the feasibility of its application in cyanide-free gold plating. Methods Chloroauric acid was used as the gold liquid and cysteine as the ligand. Aurous compound ( NaAu( Cys) 2 ) was synthesized under the alkalescent environment, and related physical and chemical properties were studied by elemental analy-zer, infrared spectroscopy, UV-Vis spectrometer, thermogravimetric analyzer and conductivity meter. Results The results indicated that the molecular formula of the product was NaAu( Cys) 2 . IR spectra revealed a strong coordinating bond formed between Au( I) and the aurous in cysteine. UV-Vis revealed its characteristic adsorption was in the range of 205~210 nm. The DTA curve ex-plained the product was thermally stable before the temperature reached 170 ℃. Conductivity data showed the complex was a typi-cal ionic compound. By means of single factor and orthogonal tests the optimized electroless nickel/immersion gold indexes were obtained:operating temperature=45 ℃, pH=2, aurous concentration=2 g/L, respectively. Quality inspection under these condi-tions showed the deposited gold particles were in excellent bonding with controllable plating rate and good gold-plating effect. Con-clusion A novel aurous compound was synthesized with stable physical and chemical properties,which is expected to be used in the cyanide-free gold plating industry. |
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| Keywords: | aurous-cysteine complex cysteine synthesis physical and chemical properties ENIG |
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