聚苯胺的聚合反应条件对其成膜性的影响

以化学方法水溶液合成聚苯胺,用相转化法制备聚苯胺富氧膜,系统地研究了各种聚合反应条件对聚苯胺的分子量、成膜性的影响．结果表明：在盐酸介质中,当酸浓度为3mol／m3、氧化剂与单体苯胺的摩尔比为0.5、聚合反应温度为0℃、聚合反应时间为4h时,所合成的聚苯胺分子量适中且成膜性好．     

掺杂型聚苯胺导电防腐涂料的制备与研究

以苯胺为单体,过硫酸铵为氧化剂,通过化学氧化法合成聚苯胺,并以其为导电填料,以环氧树脂为成膜物,制备出一种电导率在0-04-0-06 S/cm范围内的新型导电防腐涂料.讨论了氧化剂的用量、盐酸的浓度、反应时间和反应温度等对聚苯胺涂料导电性的影响以及在盐雾、酸性、碱性和油水条件下,其腐蚀情况和电导率的变化.结果表明：实验最佳制备条件为：氧化剂与苯胺的摩尔比1∶1,反应温度小于5℃,反应时间4h,盐酸浓度为2 mol/L,聚苯胺的质量分数为15％～20％;除碱性条件外,导电聚苯胺防腐涂料在油水、盐雾和酸性条件下均具有良好的导电性和防腐蚀性能.     

聚苯胺电致变色薄膜的制备与应用

聚苯胺(PAn)薄膜的重要性能之一是电致变色,在信息显示器、电致变色玻璃(智能窗,Smart Window)、电色信息存储器、无眩反光镜、军事伪装等领域具有巨大的潜在的应用价值,同时具有原料易得、化学稳定性高等一系列优势,已成为目前学术界的研究热点.分析了聚苯胺的结构、掺杂和性能特点,讨论了聚苯胺薄膜的电致变色机理,综述了聚苯胺电致变色薄膜的制备方法、性能和应用领域,提出了今后的研究方向和市场化途径.     

聚苯胺的聚合反应条件对其成膜性的影响

以化学方法水溶液合成聚苯胺,用相转化法制备聚苯胺富氧膜,系统地研究了各种聚合反应条件对聚苯胺的分子量、成膜性的影响。结果表明,在盐酸介质中,当酸浓度为３ｍｏｌ／ｍ＾３、氧化剂与单体苯胺的摩尔比为０．５、聚合反应温度为０℃,聚合反应时间为４ｈ时,所合成的本胺分子量适中且成膜性好。     

聚苯胺/磺化神府煤复合导电材料的合成与表征

用磺化煤作聚苯胺的掺杂剂，通过原位氧化聚合法制备磺化煤／聚苯胺复合导电材料，研究了磺化煤的量、苯胺单体浓度等反应条件对复合导电材料的影响，得出最佳反应条件，并用红外光谱分析了磺化煤对聚苯胺的掺杂作用。     

溶胶—凝胶法制备WO_3电致变色薄膜

本文以六氯化钨和乙醇为主要原料, 采用溶胶—凝胶法制备了ＷＯ３ 非晶态电致变色薄膜, 研究了ＷＯ３ 薄膜的结构、化学组成、电致变色性能, 结果表明用该法制备的非晶态ＷＯ３ 薄膜具有良好的电致变色特性     

溶胶—凝胶法制备WO3电致变色薄膜

本文以六氯化钨和乙醇为主要原料,采用溶胶－凝胶法制备了ＷＯ３非晶态电致变色薄膜,研究了ＷＯ３薄膜的结构,化学组成,电致变色性能,结果表明用该法制备的非晶态ＷＯ３薄膜具有良好的电致变色特性。     

二氧化锰/普鲁士蓝纳米复合薄膜的制备及其电致变色性能

采用两步电沉积法在导电玻璃表面成功制备了二氧化锰/普鲁士蓝纳米复合薄膜。首先,以四水乙酸锰和无水硫酸钠为原料配制电解质溶液,通过电沉积法直接在导电玻璃表面沉积纳米二氧化锰薄膜。其次,以铁氰化钾、氯化钾和无水氯化铁为原料配制电解质溶液,沉积普鲁士蓝薄膜,表征了复合薄膜的结构,分析了复合薄膜的电致变色特性。结果表明,电沉积得到的二氧化锰为片状结构,且片的厚度小于10 nm,沉积在二氧化锰纳米片上的普鲁士蓝呈球状结构,直径约200 nm,形成了致密的、有裂纹的膜层。所制备的复合薄膜具有良好的电致变色性能。在400～800 nm的可见光范围平均光调制幅度达到52%,着色时间和褪色时间分别为4.3 s和3.6 s,着色效率达到68.4 cm2/C。     

聚苯胺／改性聚酯复合导电纤维的制备

采用“原位”聚合法制备聚苯胺／改性聚酯复合导电纤维,分析盐酸浓度、氧化剂浓度、纤维在苯胺中的浸泡时间以及反应时间对纤维电导率的影响。研究结果表明,由改性聚酯纤维制得的导电纤维的导电性能较好,当盐酸浓度1．0mol／L,氧化剂浓度0．02mol／L,纤维在苯胺中的浸泡时间1h,反应时间1～2h时制得的纤维体积电阻率较佳。制备的导电纤维基本保持了原有的力学性能。     

酸掺杂纳米聚苯胺纤维的制备及酯化性能研究

采用快速混合法制备了各种酸(硫酸、盐酸、硝酸及乙酸等)掺杂的纳米聚苯胺纤维,扫描电子显微镜分析结果表明获得的聚苯胺纤维的直径在50~200 nm之间,酸掺杂类型对聚苯胺纤维的形貌影响不大.红外光谱及紫外可见光谱分析表明所得聚苯胺为掺杂态.以正丁醇和冰乙酸反应合成乙酸正丁酯为目标反应,考察催化剂制备条件对其活性的影响规律,结果表明掺杂酸为硫酸,其摩尔浓度为2.0 mol/L,苯胺摩尔浓度为0.3 mol/L,过硫酸铵与苯胺的摩尔浓度比为1∶2时,在相同反应条件下,乙酸正丁酯的收率最大,达65.66%.     

聚苯胺/碳纳米纤维超级电容器电极材料的制备及其性能

采用化学氧化原位聚合法制备聚苯胺纳米棒(PANI)、PANI和氮掺杂碳纳米纤维(NCNFs)的复合材料(PANI/NCNFs)。扫描电镜(SEM)结果表明, PANI纳米棒均匀生长在NCNFs的表面,制备的复合材料直径约为150～200 nm。恒流充放电结果表明,当放电电流密度为0.2 A/g时, PANI/NCNFs-1、PANI/NCNFs-2和PANI/NCNFs-3(苯胺浓度分别为0.256、0.337、0.160 mol/L制备)可以获得877、693和563 F/g的比电容。PANI/NCNFs复合材料具有优异的比电容和倍率性能,该材料在电化学储能器件领域具有广阔的应用前景。     

聚苯胺/氮掺杂碳纳米管复合材料的制备及其超级电容性能

采用化学氧化聚合法以不同浓度的苯胺单体制备聚苯胺(PANI-1和PANI-2),采用相同方法在氮掺杂碳纳米管(NCNTs)悬浮液中制备聚苯胺/氮掺杂碳纳米管复合材料(PANI/NCNTs-1和PANI/NCNTs-2)。利用循环伏安法、恒电流充放电和电化学交流阻抗技术对合成材料的超级电容器性能进行研究分析。在0.2 A/g电流密度下进行恒电流充放电, PANI/NCNTs-1和PANI/NCNTs-2复合材料可以获得较高的比电容。同时, PANI/NCNTs复合材料也具有优异的倍率性能和充放电稳定性,这都表明该复合材料在电化学储能器件领域具有广阔的应用前景。     

Influence of different substrates on the electrochromic property of polyaniline films

The polyaniline (PANI) films doped with complex acid (sulfuric acid and sulfosalicylic acid) were prepared using the potentiostatic method on bare nickel flake (NF) and flexible polyethylene terephthalate (PET)/indium tin oxide (ITO) substrates. The contents of the PANI films, surface elements, electrochromic property and electrical conductivity were characterized by energy dispersive X-ray spectrometer (EDS), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The experimental results show that differences exist among cycle stability, redox reversibility and response time of polyaniline films on these two kinds of substrates, but the electrochromic phenomenon of the PANI films is in substantial agreement. The equilibrium transmittance spectra in the visible region (400–800 nm) for the PANI film on flexible PET/ITO substrate was obtained at different applied potential from −0.4 to 1.5 V. The results show that the transmittance of the PANI film by applying voltage is adjustable in a row and has excellent electrochromic performance.     

Iron（ Ⅱ ） tetrasulfophthalocyanine mimetic enzymatic synthesis of conducting polyaniline in micellar system

Iron(II) tetrasulfophthalocyanine (FeTSPc), as a novel mimetic enzyme of peroxidase, was used in the synthesis of a conducting polyaniline (PANI)/sodium dodecylsulfate (SDS) complex in SDS aqueous micellar solutions. The effects of pH, concentrations of aniline, SDS and H₂O₂, and reaction time on polymerization of aniline were studied in this case as shown by UV-Vis absorption spectroscopy. The results show that a wide range of pH (0.5–4.0) is required to produce the conducting PANI, and the optimal pH is 1.0 in SDS micelle. The optimal concentrations of aniline, SDS and H₂O₂ in feed, and reaction time in this case for the production of conducting PANI are respectively 10 mmol/L, 10 mmol/L, 25 mmol/L, and 15 h. FT-IR spectrum, elemental analysis, conductivity, cyclic voltammetry and thermogravimetric analysis confirm the thermal stability and electroactive form of PANI.     

石墨烯化石墨/聚苯胺电极的制备及电容特性

通过电解剥落得到的表面石墨烯化的石墨电极(graphene layers/graphite plate, GL/GP)为基底,在硫酸介质中以苯胺为单体,采用循环伏安法(cyclic voltammetry, CV)制备了表面石墨烯化的石墨/聚苯胺(graphene layers/graphite plate/polyaniline, GL/GP/PANI)电极,并探究聚合圈数对GL/GP/PANI电极比电容的影响。利用场发射扫描电镜(scanning electron microscope, SEM)对电极材料的形貌进行表征。在0.5 M H₂SO₄电解液中,对合成的电极材料进行循环伏安、恒电流充放电(chronopotentiometry, CP)和电化学稳定性测试。结果表明,在表面石墨烯化的石墨电极上合成的PANI具有棒状结构,电流密度为0.085 mA/cm²时, GL/GP/PANI电容器的比电容可达1 042.8 F/g。提供了一种新的超级电容材料基底电极的构建方式。     

Polyaniline-graphite composite film glucose oxidase electrode

1 INTRODUCTION Conducting polymers, such as polyaniline (PANI), polypyrrole (PPY) and polythiophene, have attracted much attention as an enzyme-immobilizing matrix for biosensors [1?3]. Conducting polymers are known to be compatible with biological molecules in neutral aqueous solutions. Due to the reversibility doping-undoping processes and the rapid electron transfer, the conducting polymers are promising in the immobilization of biomolecules and fabrication of efficient biosensors[4]…     

Electro-oxidation treatment of Sn/PANI electrode and electrocatalytic activity of Pt/Sn hydroxide/PANI composite electrodes

After being electro-oxidized by cyclic voltammetry（CV） method in 0.5 mol/L H2SO4 solution or in 0.2 mol/L H2O2＋0.5 mol/L H2SO4 solution, the Sn/polyaniline （PANI） electrodes were modified with Pt microparticles by pulse galvanostatic method, thus Pt/Sn hydroxide/PANI electrodes were prepared. The electrocatalytic activities of the Pt/Sn/PANI electrode and Pt/Sn hydroxide/PANI electrode for formaldehyde electro-oxidation were investigated by CV method. The effects of deposition charges （Qdep） of PANI, Sn and Pt, scan rate and formaldehyde concentration on the electrocatalytic activity of Pt/Sn hydroxide/PANI electrode were also studied. The results show that the electrocatalytic activities of the Pt/Sn hydroxide/PANI electrodes are much higher than those of the Pt/Sn/PANI electrode.     

Effects of current density on the corrosion behaviour of anodized aluminum alloy in FeCl3 solution

In the present study,2024 aluminum alloy specimen was anodized in acetic acid and oxalic acid electrolytcs.Effects of the currcnt dcnsity on thc microstructure and corrosion resistance of anodic oxide ...     

苯胺用量对聚苯胺膜性能的影响

以甲基丙烯酸甲酯和丙烯酸丁酯共聚物P(MMA-co-BA)乳液为基体,采用原位乳液聚合法制备了透明导电丙烯酸酯共聚物/聚苯胺(P(MMA-co-BA)/PANI)复合膜,并对制备工艺中苯胺的用量进行了探讨.使用紫外可见分光光度计对复合膜的透光性进行了分析,研究表明当苯胺浓度为0.25g/L时,复合膜的透光性较好,随苯胺用量的增加,复合膜的透光性下降,同时导致膜的吸水率上升,膜的耐水性变差.使用高阻抗测量仪和热重分析仪对复合膜的表面电阻及热稳定性进行了研究,使用傅立叶红外分光光度计、扫描电子显微镜对P(MMAco-BA)/PANI复合膜的结构进行了表征.     

超声辐照制备聚苯胺/碳纳米管复合微管

利用超声空化产生的强烈粉碎、分散等作用,在实现碳纳米管(CNTs)纳米分散的同时通过化学氧化法聚合单体苯胺,制备了聚苯胺(PANI)包覆CNTs结构的复合微管。用苯胺浸润CNTs解决了CNTs难于分散在HCl溶液中的问题。通过调节单体苯胺和CNTs的用量比调控PANI/CNTs复合微管的管径。XPS测试表明CNTs不影响PANI的掺杂度,但有利于稳定PANI的醌环结构。CNTs的加入提高了PANI的电性能,CNTs含量为12.82％时,PANI/CNTs复合材料比纯PANI的电导率高9.5倍。