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1、摘摘 要要铝属于两性金属，在铝及铝合金的工业应用中，酸及碱溶液均可能对其产生溶解腐蚀。因此,研究铝及铝合金在酸、碱溶液中的腐蚀及防护问题，受到人们的重视。本论文合成了一种聚乙二醇酯改性席夫碱缓蚀剂，考察其对铝的缓蚀行为。以 3,5-二溴水杨醛、对氨基苯甲酸为原料，经溶液法，合成了 3,5-二溴水杨醛缩对氨基苯甲酸席夫碱，利用红外光谱、紫外光谱对其结构进行了表征与确认。利用硼酸酯化法合成了聚乙二醇（1000）单月桂酸酯，测定了其酸值、皂化值分别为 34mg/gKOH，112 mg/gKOH。以 N,N-二甲基甲酰胺为溶剂，对甲苯磺酸为催化剂，在常压下，反应温度为130，合成了聚乙二醇改性 3,5
2、-二溴水杨醛缩对氨基苯甲酸席夫碱缓蚀剂。以纯铝片为研究对象，运用分子自组装技术，在铝表面自组装成膜，利用电化学技术、失重法和扫描电子显微分析法探讨了聚乙二醇酯改性席夫碱自组装膜在 0.5mol/L 盐酸溶液中对铝的缓蚀作用。结果表明，当缓蚀剂浓度为 100mg/L 时，自组装时间为 30min，对铝的缓蚀效果最佳。论文对聚乙二醇改性席夫碱缓蚀膜的缓蚀机理也进行了初步探讨。关键词：关键词：聚乙二醇酯；改性席夫碱；自组装缓蚀膜；铝.Study on modification of Schiff base compounds by Polyethylene glycol and the self-a
3、ssembly corrosion films on the aluminum surface Student:Li Fu-kui Teacher:Liu Zheng，Xiao Shun-huaAbstract：Aluminum is gender metal, aluminum and aluminum alloy in industrial applications, acid and alkali solutions are likely to occur dissolved corrosion. Therefore, people pay attention to the study
4、of aluminum and aluminum alloy in acid, alkaline corrosion solution and their protection problems. In this graduation thesis ， we synthesized a modified polyethylene glycol ester Schiff base corrosion inhibitors and investigate their corrosion behavior of aluminum. We synthesis of 3,5 - dibromo-sali
5、cylaldehyde-amino acid Schiff base with 3,5 - dibromo-salicylaldehyde, p-amino benzoic acid as raw material in solution , characterizing and confirming its structures with infrared spectroscopy, ultraviolet spectrum . Synthesized polyethylene glycol (1000) monolaurate using boric acid esterification
6、 ,and determined its acid value was 34mg/gKOH, saponification value was 112 mg / gKOH. Synthesized corrosion inhibitors of polyethylene glycol 3,5 - salicylaldehyde on Amino acid Schiff base，with N, N-dimethylformamide as solvent, p-toluenesulfonic acid as catalyst, at atmospheric pressure, reaction
7、 temperature 130 . Synthesis corrosion inhibitors of polyethylene glycol modified 3,5 - amino acid salicylaldehyde Schiff base. With aluminum film as the research object， self-assembled film in aluminum surface use molecular self-assembly technology ,using electrochemical techniques, weight loss met
8、hod and scanning electron microscopy analysis of the polyethylene glycol modification of self-assembly of Schiff membrane in 0.5mol / L hydrochloric acid on aluminum corrosion inhibition. The results showed that the best effect on the corrosion of aluminum is when the inhibitor concentration was 100
9、mg / L, the self-assembly time of 30min. In this graduation thesis，also discussed the mechanism of corrosion inhibition film of schiff base modified with PEG.Key Words ：Polyethylene glycol ester; Modified Schiff; Self-assembly corrosion film; Aluminum.目目 录录摘 要.I目 录.III前 言.11 实验原理.41.1 3,5-二溴水杨醛缩对氨基苯
10、甲酸席夫碱的合成原理.41.2 聚乙二醇月桂酸单酯的合成原理（硼酸酯化法18）.41.3 聚乙二醇月桂酸单酯改性席夫碱缓蚀剂的合成原理.51.4 聚乙二醇月桂酸单酯改性席夫碱分子自组装膜对金属铝的缓蚀原理.52 实验部分.52.1 主要试剂与仪器.52.1.1 主要试剂及材料.52.1.2 主要仪器.62.2 实验方法.72.2.1 3,5-二溴水杨醛缩对氨基苯甲酸席夫碱的合成方法.72.2.2 聚乙二醇月桂酸单酯的制备方法及酸值、皂化值测定方法.72.2.2.1 聚乙二醇月桂酸单酯的合成方法.72.2.2.2 酸值测定方法.82.2.2.3 皂化值测定方法.82.2.3 聚乙二醇月桂酸单酯改性席夫碱缓蚀剂的合成方法.82.2.4 聚乙
