4-氨基水杨酸与苯胺共聚物的电化学合成和性能研究

发布时间：2018-03-05 12:04

本文选题：4-氨基水杨酸　切入点：聚苯胺　出处：《江苏科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,导电高分子材料发展很快,在隐身技术、电池、传感器和显示材料等方面都有应用。聚苯胺是研究最多、应用前景最好的导电高分子材料之一,但是其高的pH依赖性限制了它的发展。4-氨基水杨酸是一种同时含酸性和氧化还原活性基团的苯胺衍生物。本论文通过循环伏安法制备了聚(苯胺-共-4-氨基水杨酸),并研究了共聚物的电化学性质及其在电化学传感器以及电池方面的应用。为了进行比较,本文对4-氨基水杨酸均聚物及其电化学活性也进行了详细研究。共聚电化学合成对探索与研究更多的同时含酸性和氧化还原活性基团的新型导电高分子材料及其应用具有重要借鉴意义。1、聚(4-氨基水杨酸)的电化学合成及其电化学性质采用循环伏安法,在玻碳电极上合成聚(4-氨基水杨酸)。该均聚物在不同pH值(pH 1.0-12.0)的0.30 mol·L-1 Na2SO4溶液中均具有良好的电活性。均聚物的氧化峰和还原峰电流分别与扫描速率的平方根呈良好线性关系,表明该电极反应受扩散过程控制。使用紫外-可见光谱、XPS、红外光谱、核磁共振谱探究了该聚合物的结构,提出4-氨基水杨酸的聚合机理。SEM表明均聚物的形貌主要是由分散的颗粒构成。该均聚物链中pH敏感官能团(-COOH和-OH)的协同作用提高了均聚物的电化学性能。2、聚(苯胺-共-4-氨基水杨酸)的电化学合成及其电化学性质采用循环伏安法,首先在玻碳电极上合成聚(苯胺-共-4-氨基水杨酸)。该共聚物在不同pH值(1.0-11.0)的0.30 mol·L-1 Na2SO4溶液中表现出很高的电活性。这主要归功于共聚物链中含有4-氨基水杨酸单元的-COOH与-OH能调节共聚物周围环境pH。紫外-可见光谱、红外光谱与XPS能谱研究验证了4-氨基水杨酸在与苯胺的电化学合成中,已被成功引进共聚物链中。SEM显示了共聚物形貌由附着有小颗粒的交织纤维棒构成,而且4-氨基水杨酸的浓度及合成电位也强烈的影响了共聚物的纤维状纳米结构。3、基于聚(苯胺-共-4-氨基水杨酸)的过氧化氢传感器使用循环伏安法,在玻碳电极上合成聚(苯胺-共-4-氨基水杨酸),并构建了基于该共聚物修饰电极的新型无酶过氧化氢传感器。循环伏安扫描表明此共聚物电极能在水溶液中有效地催化还原H2O2。因此,这种修饰电极可以被用来测定水溶液中的H2O2。计时电流法研究表明,该共聚物修饰电极在含H2O2的pH 6.0的磷酸盐缓冲溶液中,在5-500μmol·L-1的浓度范围内,可得一条线性相关系数为0.9969的直线。此外,实验结果还表明该共聚物修饰电极传感器具有良好的选择性和稳定性。4、聚(苯胺-共-4-氨基水杨酸)用于锌-导电聚合物可充电电池的电化学性能研究使用循环伏安法,在铂片电极上合成了直径约为20-80 nm纤维结构的聚(苯胺-共-4-氨基水杨酸)。基于循环伏安与交流阻抗技术对电解液的研究,构建了以聚(苯胺-共-4-氨基水杨酸)修饰的铂片电极为正极,锌片为负极,电解液为氯化铵与氯化锌混合液的二次电池。通过恒电流计时电位法测定了该二次电池的充-放电性能,结果显示该聚合物电池的比容量高于聚苯胺电池,充-放电次数达到181次时,库伦效率还能达到97.9%。这说明该电池具有良好的充-放电性能。
[Abstract]:In recent years, the development of conductive polymer materials quickly, the battery in the stealth technology, sensor and display material etc are applied. The polyaniline is the most studied, one of the best applications of conductive polymer materials, but the high pH dependent limits the development of it is.4- amino salicylic acid containing both acidic and redox the active group of aniline derivatives. The cyclic voltammetry was prepared by poly (aniline - -4- amino salicylic acid), and to study the electrochemical properties of the copolymer and its application in electrochemical sensors and batteries. For comparison, the 4- aminosalicylic acid homopolymer and its electrochemical activity were studied in detail. The important significance of.1 NEW type of conductive polymer materials on the electrochemical synthesis of copolymer and explore and research more acidic and redox active group and its application, Poly (4- amino acid) electrochemical synthesis and electrochemical properties by cyclic voltammetry, the synthesis of poly on glassy carbon electrode (4- amino acid). The homopolymer at different pH values (pH 1.0-12.0) has a good electricity activity was 0.30 mol / L-1 Na2SO4 solution. The oxidation peak of homopolymer and the reduction peak current square root respectively with the scan rate showed a good linear relationship, show that the electrode reaction diffusion process control. By using UV Vis spectroscopy, XPS, infrared spectroscopy, nuclear magnetic resonance spectroscopy studies the structure of the polymer, the 4- amino acid polymerization mechanism shows that the morphology of.SEM homopolymer is mainly composed of by the dispersed particles. The homopolymer chain pH sensitive functional groups (-COOH and -OH) the synergistic effect to improve the electrochemical performance of.2 homopolymer, poly (aniline - -4- amino salicylic acid) electrochemical synthesis and electrochemical properties by cyclic voltammetry First of all, on a glassy carbon electrode for synthesis of poly (aniline Co -4- amino salicylic acid). The copolymer in different pH values (1.0-11.0) showed a very high electrical activity of 0.30 mol L-1 Na2SO4 solution. This is mainly due to -COOH and -OH in the copolymers containing 4- amino acid unit can adjust the copolymer around pH. UV Vis spectroscopy, infrared spectroscopy and XPS spectroscopy studies verified in electrochemical synthesis of 4- amino salicylic acid and aniline, has been successfully introduced in the copolymers.SEM shows the morphology of the copolymer composition attached with small particles of interwoven fiber rod, and the concentration of 4- aminosalicylic acid and synthetic potential of strong influence the.3 fibrous nano structure of copolymer, based on poly (aniline Co -4- amino salicylic acid) by cyclic voltammetry using hydrogen peroxide sensor on glassy carbon electrode synthesis of poly (aniline - -4- amino salicylic acid), and the construction of the The new copolymer modified electrode enzyme free hydrogen peroxide sensor based on cyclic voltammetry showed that the copolymer electrodes in aqueous solution can effectively catalyze the reduction of H2O2. therefore, this modified electrode can be used for the determination of H2O2. in aqueous solution chronoamperometric results indicated that the copolymer modified electrode in phosphate buffer solution containing H2O2 pH 6. And in the concentration range of 5-500 ~ mol ~ L-1, may have a linear correlation coefficient of 0.9969 lines. In addition, the experimental results show that the copolymer modified electrode sensor has good selectivity and stability of.4, poly (aniline - -4- amino salicylic acid) was used to study the electrochemical properties of zinc - conductive polymer rechargeable battery the use of cyclic voltammetry on platinum electrode was synthesized with a diameter of about 20-80 nm fiber structure of poly (aniline - -4- amino salicylic acid) and AC resistance based on cyclic voltammetry. Study on the technology of anti electrolyte, constructed from poly (aniline Co -4- amino salicylic acid) modified platinum electrode as anode, zinc plate as anode, electrolyte for secondary battery two ammonium chloride and zinc chloride mixture. The two battery charge - discharge performance was measured by constant current chronopotentiometry the results show that the polymer, the specific capacity of the battery is higher than that of polyaniline battery charge discharge when the number reached 181, the efficiency of Kulun can reach 97.9%. which shows that the battery has good charge discharge performance.

【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O631

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