抗微生物腐蚀复合薄膜材料的性能研究

发布时间：2018-09-17 17:00

【摘要】：微生物腐蚀致使不锈钢设备及管道损坏,并由此带来巨大的经济损失。研究负载在不锈钢表面的抗微生物腐蚀材料,对控制金属的生物腐蚀,减少社会资源浪费具有重要理论意义及广阔的应用前景。论文开展了不锈钢表面聚多巴胺/硅烷偶联剂复合薄膜的制备与研究。所制备的聚多巴胺/硅烷偶联剂复合薄膜由多巴胺及KH550在室温有氧碱性条件下反应获得。由于多巴胺在有氧碱性条件下氧化聚合为富含邻苯二酚结构的聚多巴胺,多巴胺氧化反应中间体与KH550的氨基发生的反应以及KH550分子水解后形成的Si-O-Si键,因此聚多巴胺/硅烷偶联剂复合膜为一层致密的有机无机复合膜。由于具有大量的邻苯二酚结构聚多巴胺/硅烷偶联剂复合薄膜对不锈钢表面具有很强的粘附能力,因此薄膜在长期的海水浸泡中体现出非常强的稳定性。3-氯-2-羟丙基三甲基氯化铵(CHPTAC)在碱性条件下可以与聚多巴胺/硅烷偶联剂复合薄膜表面所含有的氨基发生加成反应,因此进一步研究制备了聚多巴胺/硅烷偶联剂-季铵盐杀菌薄膜。对聚多巴胺/硅烷偶联剂-季铵盐杀菌膜材料表面成分及表面形貌进行了分析,测试了聚多巴胺/硅烷偶联剂-季铵盐杀菌薄膜的稳定性及抗菌性能。通过在聚多巴胺/硅烷偶联剂复合薄膜表面连接枝化聚乙烯亚胺制备了聚多巴胺/硅烷偶联剂/聚乙烯亚胺薄膜。并以此为基础通过接枝CHPTAC,制备了聚多巴胺/硅烷偶联剂/聚乙烯亚胺-季铵盐抗菌复合膜。由于聚乙烯亚胺的接枝,聚多巴胺/硅烷偶联剂/聚乙烯亚胺薄膜较聚多巴胺/硅烷偶联剂薄膜表面氨基密度提高。由于氨基密度的增加,因此接枝CHPTAC后所制备的聚多巴胺/硅烷偶联剂/聚乙烯亚胺-季铵盐抗菌复合膜具有更强的抗菌性能。
[Abstract]:Microbial corrosion causes damage to stainless steel equipment and pipes, which results in huge economic losses. It is of great theoretical significance and broad application prospect to study the anti-microbial corrosion material loaded on the surface of stainless steel to control the biological corrosion of metals and to reduce the waste of social resources. The preparation and study of polydopamine / silane coupling agent composite film on stainless steel surface were carried out in this paper. The polydopamine / silane coupling agent composite films were prepared by the reaction of dopamine and KH550 under the condition of aerobic alkalinity at room temperature. Because dopamine was oxidized and polymerized into polydopamine rich in catechol structure under aerobic alkaline condition, the intermediate of dopamine oxidation reaction reacted with the amino group of KH550 and the Si-O-Si bond was formed by hydrolysis of KH550 molecule. Therefore, the polydopamine / silane coupling agent composite membrane is a dense organic and inorganic composite membrane. Due to a large number of catechol structure polydopamine / silane coupling agent composite film has a strong adhesion to the surface of stainless steel. Therefore, the film shows very strong stability in seawater immersion for a long time. (CHPTAC) can react with amino groups on the surface of polydopamine / silane coupling agent in alkaline condition. Therefore, quaternary ammonium salt as a coupling agent of polydopamine / silane was further studied. The surface composition and surface morphology of polydopamine / silane coupling agent quaternary ammonium salt germicidal film were analyzed. The stability and antibacterial properties of polydopamine / silane coupling agent quaternary ammonium salt bactericidal film were tested. Poly (dopamine / silane coupling agent) / polyethyleneimine thin films were prepared by adding polyethyleneimide onto the surface of polydopamine / silane coupling agent composite film. The polydopamine / silane coupling agent / polyethyleneimide-quaternary ammonium salt antibacterial composite membrane was prepared by grafted CHPTAC,. The surface amino density of polydopamine / silane coupling agent / polyimide film is higher than that of polydopamine / silane coupling agent film. Because of the increase of amino density, the polydopamine / silane coupling agent / polyethyleneimide-quaternary ammonium salt composite film prepared by grafting CHPTAC has stronger antibacterial properties.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.2

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