【作者】 王新刚；

【导师】 王晶；

【作者基本信息】 大连交通大学 ， 材料学， 2007， 硕士

【摘要】 绿色化学及其应用技术已经成为环境保护和防止污染的重要内容，应用绿色化学技术合成制备方法简单、高效、无毒的咪唑啉缓蚀剂及无毒、易生物降解的聚天冬氨酸阻垢剂已经成为工业冷却水、石油化工等领域的前沿课题。本论文在前人以脂肪酸(油酸、月桂酸)与多胺(羟乙基乙二胺、二乙烯三胺)为原料合成四种水溶性较好的咪唑啉缓蚀剂的基础上，以丙炔醇、丁炔二醇、十六烷基三甲基溴化铵为复配剂进行复配研究，以解决咪唑啉缓蚀剂单一作用效果不理想的问题，考察了不同复配剂对缓蚀剂性能的影响；以马来酸酐、氨水为原料，采用真空聚合法合成出了聚天冬氨酸阻垢剂；以咪唑啉缓蚀剂为主缓蚀剂、聚天冬氨酸为主阻垢剂合成出了兼具缓蚀、阻垢性能的缓蚀阻垢剂。采用IR分析法、静态失重法、SEM、极化曲线、EDTA滴定法、分光光度法等手段考察了咪唑啉中间体及聚合产物结构、复配对咪唑啉缓蚀剂缓蚀性能的影响及聚天冬氨酸的缓蚀阻垢性能。结果表明，丙炔醇复配在很大程度上提高了缓蚀率，丁炔二醇的复配效果次之，十六烷基三甲基溴化铵的复配效果不明显，丙炔醇复配后的咪唑啉类缓蚀剂在低浓度的缓蚀率可达到99％。咪唑啉类缓蚀剂是通过其在金属表面吸附形成一层有机保护膜来抑制腐蚀的发生，而通过丙炔复配后，缓蚀剂的吸附膜更加致密、均匀，从而使缓蚀剂在低浓度、长时间的腐蚀后仍具有较好的缓蚀作用。聚天冬氨酸阻垢剂在低钙离子浓度时的阻垢率可达到90％以上，可适用于较高钙离子、高温水系统中。聚天冬氨酸也具有较好的阻硫酸钙、分散氧化铁的能力以及一定的缓蚀能力。PASP是通过改变碳酸钙的晶型、络合增溶作用及凝聚分散作用来起到阻垢作用的。以咪唑啉类缓蚀剂和聚天冬氨酸阻垢剂成功合成的环境友好缓蚀阻垢剂在石化、冶金、发电等行业将会有广阔的应用前景。更多还原

【Abstract】 Green chemistry and its application technology have become the important contents of environmental protection and preventing pollution. Synthesis of imidazoline-type inhibitior, which has a simple preparation, high efficiency and nontoxicity, polyaspartic acid(PASP), which has nontoxicity and biodegradability have become the frontier researches in the field of industrial cooling water and petrochemical engineer.Water soluble imidazoline inhibitor had been synthesized by a two-step vacuum dehydration method using fatty acid such as oleic acid and lauric acid and amine such as diethylene triamine and N-(2-hydroxyl-ethyl)-ethylenediamine by former investigator of our group. But its corrosion inhibition efficiency was low and the performance wasn’t optimistic after long time. Propiolic alcohol, butynediol and hexadecyl trimethyl ammonium bromide(CTAB) were used to compound with imidazoline-type inhibitors. Polyaspartic acid(PASP) was synthsised by vacuum polymerization method using maleic anhydride and ammonia water as precursors. Enviromental friendly corrosion and scale inhibitor was prepared successfully using imidazoline inhibitor and polyaspartic acid.The structures of imidazoline intermediates and polysuccinimide, corrosion inhibition performance of imidazoline-type inhibitors, scale inhibition performance of polyaspartic acid were characterized by infrared spectrum analysis, Tafel polarization curve, SEM, energy spectrum analysis, static weight-lossing method, EDTA chelatometry and spectrophotometry.The results show that the compounding of propiolic alcohol improves the corrosion inhibition efficiency and reduces the corrosion rate in large degree, effect of butynediol is the second and CTAB hardly improves the inhibition performance. Inhibition efficiency of imidazoline can achieve above 99% under low concentration after compounding with propiolic alcohol. The imidazoline-type inhibitors compounding with propiolic alcohol inhibit corrosion by forming a much more compact and uniform adsorbed inhibitor film on the metal surface, which still have high inhibition efficency at lower concentration after a longer time. Polyaspartic acid adapts to high concentration of calcium ion and high temperature water systerm. It inhibites not only calcium carbonate scale but also calcium sulfate scale. It also has decentralization against ferric iron oxide and a certain corrosion inhibition performace. The addition of PASP can change the crystal type of calcium carbonate and has obvious inhibition efficiency on calcite. The corrosion and scale inhibitor, which is synthesized successfully by imadaz-oline inhibitor and polyaspartic acid, will have a extensive application prospect in petrochemical engineering, metallurgy and generate electricity industry.更多还原