均三嗪二硫醇论文：铝表面恒电位技术制备均三嗪二硫醇纳米功能薄膜.doc

均三嗪二硫醇论文：铝表面恒电位技术制备均三嗪二硫醇纳米功能薄膜【中文摘要】金属表面均三嗪二硫醇分子的吸附和聚合研究越来越热,原因在于其防腐蚀性能、粘接性能、润滑性能、节电性能和疏水性能。该类化学物单体在金属表面可以光聚合、热聚合、电化学聚合和蒸发聚合。电化学的吸附和聚合同时形成。以往研究,均三嗪二硫醇主要是由循环伏安法和恒电流技术制备。但是,以往的制备方法所得的纳米聚合薄膜厚度上不能满足某些应用的需求。因此,寻找制备高质量的均三嗪二硫醇纳米聚合薄膜的方法势在必行,从而将纳米功能薄膜引入的应用领域,产生更大的经济效益。本实验研究了纯铝表面一步恒电位和双步恒电位电化学方法制备均三嗪二硫醇纳米聚合薄膜的影响因素和机理。一步恒电位研究中,选用的为不饱和均三嗪二硫醇单体含有烯丙基和全氟代烷基,研究的影响因素包括电化学沉积电位和时间。由此类化合物制备得纳米聚合薄膜具有润滑性能、高介电性能和超疏水性能。双步恒电位电化学研究中,选用的为饱和均三嗪二硫醇单体,研究的内容为初步电位的确定,然后在初步电位下探讨不同二次电沉积电位和温度。通过红外光谱和X射线光电子能谱推测了饱和与不饱和均三嗪二硫醇的电化学聚合机理,通过红外光谱和原子力显微镜等技术确定了制备该两类纳米聚合薄膜的最佳制备条件。单电位沉积结果表明:在溶液为AF17N(5mmol/L)和亚硝酸钠电解质(0.15 mol/L)的蒸馏水溶液中,制得高质量的聚合纳米薄膜的条件是:在298K下,用8V电压聚合20s。双电位沉积结果表明:循环伏安扫描范围为-0.72.1V,扫描速率为10mv/s时,DHN的聚合电位为1.6V。在两步法中,先用1.6V电化学聚合时间60s,再用10V处理30条件下,制得高质量的聚合纳米薄膜的最佳温度10。电化学聚合机理为:亚硝酸根离子首先被电化学氧化为二氧化氮自由基,该自由基作为引发剂,得到均三嗪二硫醇自由基和均三嗪二硫醇阴离子自由基,这两种自由基经过链增长反应,得到的聚合物;部分均三嗪二硫醇自由基、均三嗪二硫醇阴离子巯基自由基与烯丙基发生反应,形成相对应的聚合物;巯基和铝及其氧化物反应,生成S-Al键。【英文摘要】Adsorption and polymerization of triazinedithiols (TDTs) on metal surfaces have been receiving considerable attention because of their anticorrosion property, adhesion property, lubrication property, dielectric property and superhydrophobic property on a variety of metal substrates. Monomer layer of TDTs on metal surfaces can be polymerized photochemically, thermochemically, electrochemically or evaporatingly. The electropolymerization process offers the advantage of simultaneous formation and deposition of the polymer coatings on metal substrate from monomer-electrolyte solution. Triazinedithiol polymeric nanofilm could be prepared by cyclic voltammetry and galvanostatic polymerization technique in the previous studies. These electrochemical methods had been studied systematically. However, the polymeric nanofilms obtained by the above techniques could not meet our need since they are too thin to apply in more fields.In this paper, the triazinedithiol nano polymeric film was prepared on pure aluminum surface by one-step and two-step potentiostatic electrochemical polymerization. Electronic balance was used to examine the polymeric film weight before and after electrochemical polymerization. Polymeric film thickness was measured by ellipsometer. The chemical structure of nanofilm was characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS).The results of one-step experiment showed that the optimal electrochemical polymerization potential and time were 8V and 20 seconds, respectively. Uniform and compact nanofilm of PAF17 could be obtained under these conditions. The results of two-step experiment one showed that the optimal electrochemical polymerization process of the two-step process was firstly polymerized at 1.6V for 60s, then at 10.0V for 30s and the optimal electrochemical polymerization temperature was 10. Uniform and dense nanofilm of PDH nanofilm can be obtained under these conditions. Mechanism of the process was also proposed.【关键词】均三嗪二硫醇 铝表面 纳米聚合薄膜 恒电位电沉积技术【英文关键词】triazinedithiol aluminum polymeric nanofilm potentiostatic electrochemical polymerization【目录】铝表面恒电位技术制备均三嗪二硫醇纳米功能薄膜摘要6-7ABSTRACT7-8第一章 文献综述11-261.1 均三嗪二硫醇类化合物简介11-151.1.1 均三嗪二硫醇类化合物的性质11-121.1.2 均三嗪二硫醇类化合物的应用12-151.2 均三嗪二硫醇纳米薄膜制备方法15-161.2.1 流延薄膜(cast film)和Langmuir-Blodget 膜151.2.2 自组装膜（SAMs)15-161.2.3 电化学沉积膜161.3 均三嗪二硫醇类化合物聚合机理16-201.3.1 光聚合16-171.3.2 热聚合17-191.3.3 摩擦聚合191.3.4 蒸发聚合19-201.3.5 电化学聚合201.4 电化学沉积制膜简介20-231.4.1 电化学简介20-211.4.2 电化学沉积简介21-231.5 纳米薄膜的检测手段23-251.5.1 傅里叶变换红外光谱（FT-IR）231.5.2 光电子能谱（XPS）23-241.5.3 原子力显微镜分析（AFM）24-251.6 本研究的目的及意义25-26第二章 一步恒电位法制备均三嗪二硫醇纳米聚合薄膜26-322.1 仪器和方法26-272.1.1 实验材料和仪器262.1.1.1 实验材料262.1.1.2 实验仪器:262.1.2 实验方法26-272.1.2.1 聚合膜的制备26-272.1.2.2 聚合膜的表征272.2 结果与讨论27-312.2.1 沉积电位对聚合膜的影响27-302.2.2 沉积时间对聚合膜的影响30-312.3 小结31-32第三章 两步恒电位法制备均三嗪二硫醇纳米聚合薄膜32-383.1 仪器和方法32-333.1.1 实验材料和仪器323.1.1.1 实验材料323.1.1.2 实验仪器323.1.2 实验方法32-333.1.2.1 单步法聚合电位探讨323.1.2.2 两部法制备纳米聚合薄膜323.1.2.3 膜的表征32-