【作者】 冯玮玮；

【导师】 魏献军；

【作者基本信息】 河南师范大学 ， 物理化学， 2012， 硕士

【摘要】 本论文首先以苯胺和氯乙醇为基材制备出N-羟乙基苯胺，再以苯胺和N-羟乙基苯胺为材料，过硫酸铵为氧化剂用化学法合成出导电聚合物，并使用扫描电镜（SEM）、红外图谱XRD、X-射线衍射法即XRD（X-ray diffraction）透射电镜TEM等分析手段分别对制备产品进行了研究和表征，并通过电化学工作站测试其阻抗，对阻抗图谱进行分析，重点对合成出的导电聚合物湿敏性和导电性进行了分析、研究和比较。分别以盐酸和高氯酸作为掺杂剂，改变反应物苯胺和N-羟乙基苯胺的比例化学法合成出导电共聚物，选用的做掺杂剂的酸不同，生成聚合物的性质有很大差别，其中盐酸做掺杂剂时合成的导电共聚物具有形貌好，分散性好聚合均匀，稳定性好等优良湿敏性特点。盐酸掺杂的苯胺/N-羟乙基苯胺共聚物，反应物苯胺和N-羟乙基苯胺的添加比例不一样，对聚合物形貌、湿敏性和导电性、稳定性以及溶解性都有影响。其中当苯胺和N-羟乙基苯胺以1:1比例反应制备出的导电聚合物具有形貌好均匀以及适中的湿敏稳定性和溶解性能。当反应物苯胺和N-羟乙基苯胺1:1，再加入反应液质量10%的聚乙烯吡咯烷酮时，制备出的导电聚合物具有较好的形貌，电镜扫描出其形貌为均匀的空心小球，其它反应物比例下聚合的反应物扫描电镜观察均为片状或破壳结构表面负载有东西的不均匀固体，添加比例的不同，对其形貌、溶解性和湿敏性均有较大的影响。反应物中苯胺比例增大时，虽然湿敏性能良好，但其溶解性不高，反应物中N-羟乙基苯胺的加入增加了聚合物的溶解性，但湿敏性能降低了，只有苯胺/N-羟乙基苯胺比例适当时生成的聚合物才既具有良好的湿敏性能，溶解性又好。我们采用电化学工作站对聚合物阻抗进行分析，对其阻抗变化规律进行了研究，并解释了阻抗变化原因。研究表明：各聚合物的阻抗值均随着环境湿度变化而变化。随着反应物苯胺比例的增多反应物阻值减小，溶解性减小；反之N-羟乙基苯胺比例的增多，阻值增大，但溶解性增加。所以控制苯胺与N-羟乙基苯胺比例得当，聚合物湿敏性能和溶解性能均可以良好发挥。当苯胺和N-羟乙基苯胺1:1比例反应聚合时，其湿敏性能和溶解性都可以得到良好体现。本论文最后采用电化学循环伏安法高氯酸做掺杂剂制备了不同比例的反应物苯胺/N-羟乙基苯胺的导电聚合物，研究了不同条件下的聚合特性，在循环伏安的扫描过程中单体首先被氧化成反应中间体（一般认为是醌式结构），在反应中间体催化下反应快速进行；随电位循环扫描次数的不断增加，峰值电流以及通过电极的电量逐渐增大，沉积在工作电极上聚合物膜也逐渐加厚；扫描速率对电化学聚合过程也有影响。扫描速率太大或太小聚合电流都会降低，要得到理想的聚合物膜需要控制适当的扫描速率。更多还原

【Abstract】 This paper first we preparation out N-Hydroxyethylaniline with aniline and2-chloroethanol asbase material, and then we use ammonium persulfate as the oxidant to synthesize conducting polymer Withaniline and N-hydroxyethyl aniline as reactant. the preparation of the products were research andcharacterization Through the use of various analysis methods,such as scanning electron microscopy(SEM),infrared mapping (IR), X-ray diffraction method (XRD), transmission electron microscopy (TEM)and so on.The key to this paper, moisture sensitivity and electrical Conductivity of those synthesis ofconductive polymers were analyzed, Researched and compared.We respectively use hydrochloric acid and perchloric acid as doping agent and change theproportion of aniline and N-hydroxyethyl aniline to synthesize conductive copolymer with Chemicalmethods. Choosing different acids to doping agent, Properties of products make great differences. When wechoose hydrochloric acid as doping agent, synthesis of conductive polymers have high electrochemicalperformances, for example, good appearance,good dispersibility, good stability, good moisturesensitivity and so on.We choose the same acid as doping agent, and change the proportion of aniline andN-hydroxyethyl aniline, Properties of products Make Great Differences which contains appearance,moisture sensitivity, electrical Conductivity stability and dissolubility. When the weight ratio of aniline andN-hydroxyethyl is1:1, and we put polyvinylpyrrolidone whose weight is10%of the weight of the reactionliquid, synthetic of polymers has the best electrochemical performances, which is well-distributed andsmall Hollow sphere.When we increase the proportion of aniline on reaction, although conductive polymers havebetter moisture sensitivity, but they have bad solution. Only we adjust the proper proportion of aniline andN-hydroxyethyl aniline, Synthesised conductive polymers contain not only good moisture sensitivity,butalso good Solubility. We measure the electrical impedance of Synthetic polymer by adoptingelectrochemical workstation and analyse their laws. Research indicated, the electrical impedance ofSynthetic polymers is affected by ambient humidity, the Impedance values and Solubility of conductivepolymers Increase with the decrease of Humidity. Only the reactant proportion, synthetic of polymers contain good moisture sensitivity as well as good Solubility. When the weight ratio of aniline andN-hydroxyethyl is1:1, synthetic of polymers has the best electrochemical performances.At last, we use perchloric acid as doping agent and adjust the proportion of aniline andN-hydroxyethyl aniline to synthesize conductive polymer by AC cyclic voltammetry. We separatelyresearch the polymerization characteristics under different conditions. During the scanning process of ACcyclic voltammetry, the monomer first was oxidated to reaction intermediate, and Reaction intermediatewas used as catalyst to speed up the reaction speed. Along with the increase of scanning times, the peakcurrent and power of electrode all increase, the membrane of polymer increases in thickness.sweep speedhas an important effect on polymerization reaction. Too fast or too slow of sweep speed both lead toPolymerization current reduce. Only control proper sweep speed we can synthesis perfect membrane ofpolymer.更多还原