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以[Emim]Cl/Al Cl3(33.3/66.7 mol%)离子液体为电解质,选取了丙酮、乙酰胺、乙酸、乙酸甲酯、氨基甲酸甲酯5种含有羰基官能团的有机分子作为添加剂,讨论其对铝沉积层的影响.通过CV曲线、SEM、XRD、UV-Vis、NMR等分析,进一步研究了添加剂对Al沉积层形貌、晶面取向及沉积机理的影响.结果表明:氨基甲酸甲酯是一种性能优异的整平添加剂,45 mmol/L氨基甲酸甲酯的加入明显改善Al产品的光亮度,得到细致均匀且镜面光亮的Al沉积层.氨基甲酸甲酯为添加剂时,在电解液体系中没有形成新的金属络合离子,不影响电解液中活性铝离子结构;其羰基碳原子为正电中心在阴极表面吸附,对Al的电沉积过程产生抑制进而获得整平和光亮效果.
Five kinds of organic molecules containing carbonyl functional groups were selected as the electrolyte with [Emim] Cl / Al Cl3 (33.3 / 66.7 mol%) ionic liquid as the electrolyte, and the effects of acetone, acetamide, acetic acid, methyl acetate and methyl carbamate were discussed On the deposition of aluminum.The effects of additives on the morphology, orientation and deposition mechanism of Al deposit were further studied by CV curve, SEM, XRD, UV-Vis and NMR analysis.The results showed that: Is a kind of leveling agent with excellent properties. The addition of 45 mmol / L methyl carbamate significantly improves the brightness of Al products, resulting in a fine uniform and mirror-bright Al deposit. When methyl carbamate is an additive, Department of the system does not form a new metal complex ions, does not affect the structure of active aluminum ions in the electrolyte; the carbon atoms of the positive center of the carbon atoms in the cathode surface adsorption, the Al electrode deposition process to produce inhibition and leveling and light effect.