铝材表面Ni-MoS2自润复合镀层及其性能

采用扫描电镜、化学分析法和电化学方法,详细研究了阴极电流密度、镀液温度、镀液中Mo S2微粒浓度等工艺条件对Ni-MoS2自润滑复合镀层硬度及摩擦学性能的影响,获得了制备复合镀层的最佳工艺参数为：MoS2 10 g/L,分散剂0.1 mg/g MoS2,表面活性剂C 10 -6 L/L,pH值4.8,温度55 ℃,Dk=1 A/dm\+2,空气搅拌。按此工艺获得的复合镀层具有显著的耐磨减摩功效。     

铝材表面Ni-MoS2自润复合镀层及其性能

采用扫描电镜、化学分析法和电化学方法，详细研究了阴极电流密度、镀液温度、镀液中MoS     

反相高效液相色谱法分析甲苯氧化产物

采用反相高效液相色谱内标法对金属卟啉催化空气氧化甲苯的主产物苯甲醛、苄醇、苯甲酸进行定量分析。经过实验得到的最佳色谱条件为:ZorbaxSB-C8(250mm×4.6mm,ф5μm)色谱柱,甲醇和磷酸水溶液(pH=2.2)(体积比4060)流动相,柱温为室温,流量1.0ml/min,VWD检测波长218nm。以对羟基苯甲酸为内标,各组分的相对标准偏差均小于2.0%,相关系数大于0.9990。该方法样品不需预处理,分析时间较短,重现性好,准确可靠。     

金属卟啉催化的甲苯氧化及工艺优化

Catalytic activities of a series of metalloporphyrin complexes in selective aerobic oxidation of toluene were investigated.The effects of different central metal ions in metalloporphyrins[T（p-Cl）PPMCl（M=Fe,Co,Mn,Cu）] on the reaction course had been examined and it was found that T（p-Cl）PPCu presented the highest catalytic activity in the reaction.The reaction conditions of toluene oxidation were optimized by using orthogonal experiment design.Five relevant factors were investigated：temperature,air pressure,catalyst loading,air flow rate and reaction time.The effects of the five factors on both toluene conversion and total yield of benzaldehyde and benzyl alcohol were discussed.The research results showed that the reaction temperature was the most significant factor influencing toluene oxidation.On the basis of the margin analysis,the optimum conditions for the toluene conversion and the total yield of benzaldehyde and benzyl alcohol respectively were achieved,under which the toluene conversion was up to 14.67%and the total yield of benzaldehyde and benzyl alcohol reached 5.89%.     

铝质材料上电镀镍及预处理工艺的研究

采用浸镀Ｚｎ－Ｎｉ合金预处理工艺,在铝质材料表面可制得结合力良好,外观平整光滑的镀镍层,与磷酸阳极氧化处理和二次浸锌处理相比,结晶更细致,镀层质量更好。添加剂能明显改善镀层质量。镀镍对铝质材料的表面改性效果明显。