导电聚苯胺/OMMT纳米复合材料的研究

以十二烷基苯磺酸(DBSA)为掺杂剂和乳化剂,过硫酸铵(APS)为引发剂,采用乳液插层聚合方法制备了导电聚苯胺包覆有机蒙脱土(OMMT)纳米复合材料。探讨OMMT、APS和DBSA用量对复合材料电导率的影响。结果表明,在苯胺、APS、DBSA三者摩尔比为1：1：1．5时,苯胺与OMMT质量比为1：3.5时,复合材料的电寻率最高可达0．0571S／cm。用X射线衍射和傅立叶变换红外光谱对复合材料进行了表征。结果表明,聚苯胺已插层到OMMT层间,且聚苯胺在受限的纳米空间只能以有限层分子存在,很可能是伸展链构象。     

乳液聚合法制备聚苯胺/聚乙烯醇电致变色材料

以十二烷基苯磺酸(DBSA)为掺杂剂,在非有机溶剂的两相体系中以聚乙烯醇(PVA)为成膜助剂,采用现场乳液聚合法合成了可直接用于制备电致变色膜的聚苯胺(PAn)/PVA乳液。研究了PVA含量、苯胺(An)与DBSA的量比、氧化剂过硫酸铵(APS)与An的量比及反应温度对膜的电致变色性、导电性的影响。实验结果表明:在w(PVA)=4 3%、n(An)∶n(DBSA)∶n(APS)=0 86∶1∶0 86、反应温度为8℃时,所制得的PAn/PVA乳液可直接制成具有良好电致变色性的自支撑膜(电致变色响应时间小于0 5s,电导率可达2 69×10-4S/m)。     

微乳液法制备导电聚苯胺及其在防腐涂层中的应用

采用微乳液聚合法,以十二烷基苯磺酸(DBSA)和盐酸(HCl)为掺杂剂、OP-10为助乳化剂、过硫酸铵为氧化剂,制备了聚苯胺悬浮液。探讨了主要原料用量和工艺参数对聚苯胺电导率的影响,确定最优反应条件为:n(DBSA):n(HCl)=3:2,n(酸):n(苯胺)=2:1,n(氧化剂):n(苯胺)=1:1,m(OP-10):m(苯胺)=2:3,反应时间9 h,反应温度30℃。将所制聚苯胺悬浮液直接与水性环氧乳液混合均匀后加入配套固化剂,通过电化学测量和浸泡试验研究了所得涂层的防腐性能。结果表明其防腐性能相比纯环氧涂层得到非常大的提高。     

不同酸掺杂聚苯胺的性能研究

合成了盐酸(HC1)、氨基磺酸(NH2SO3H)、十二烷基苯磺酸(DBSA)掺杂的聚苯胺(PANI),探讨了酸用量、氧化剂用量、反应时间以及反应温度等因素对产物电导率的影响,并对这3种酸掺杂的聚苯胺的压片电阻和热稳定性进行了比较.结果表明:当c(HCl)=0.5 mol·L-1,反应时间为6 h,n(APS)∶n(An)为1.0,在1 ℃左右下所得HCl掺杂的PANI的电导率为1.98 S·cm-1;当c(NH2SO3H)=1.0 mol·L-1,反应时间为6 h,n(APS)∶n(An)为2.0,在2 ℃左右下所得NH2SO3H掺杂的PANI的电导率为0.26 S·cm-1;当c(DBSA)=1.0 mol·L-1,反应时间为8 h,n(APS)∶n(An)为2.0,在2 ℃左右下所得DBSA掺杂的PANI的电导率为0.98 S·cm-1.对于产物的固体压片电阻,HC1掺杂PANI最小为10 Ω,NH2SO3H掺杂PANI最大为120 Ω.而对于产物的热稳定性,NH2SO3H和DBSA掺杂的PANI具有较好的环境稳定性,要好于HC1掺杂的PANI.     

磺酸掺杂煤基聚苯胺/HDPE导电复合材料的制备

采用热掺杂法制得十二烷基苯磺酸 (DBSA)掺杂态煤基聚苯胺 (CBP) ,并采用熔融共混工艺 ,制备出HDPE/CBP DBSA导电复合材料 ,研究了掺杂时间和掺杂温度对CBP电导率以及CBP DBSA用量对HDPE/CBP DBSA复合材料电阻率的影响。结果表明 :当m (DBSA)∶m (CBP) =1 6,70℃下退火 2h时 ,CBP DBSA的电导率可达0 179S/cm ;红外光谱说明DBSA对CBP起到了较好的掺杂作用。当CBP DBSA的质量分数为 13 %时 ,复合材料的体积电阻率达到 2 9× 10 7Ω·cm ,同时具有较好的力学性能     

石墨烯/聚苯胺复合材料的制备及其光催化性能

以苯胺和氧化石墨烯溶液为原料,采用乳液聚合法,根据m(氧化石墨烯)∶m(苯胺)为0∶10、1∶20和1∶10合成不同石墨烯/聚苯胺复合材料。采用紫外可见分光光度计、SEM、XRD及FT-IR对复合材料进行表征。XDR和FT-IR表明,乳液聚合合成了石墨烯/聚苯胺复合材料。SEM表明,聚苯胺以氧化石墨烯为载体,分散在其表面。光催化结果表明,石墨烯/聚苯胺复合材料的光催化性能较纯聚苯胺明显提高,m(氧化石墨烯)∶m(苯胺)=1∶20的石墨烯/聚苯胺复合材料的光催化性能高于m(氧化石墨烯)∶m(苯胺)=1∶10,原因可能在于微观结构的不同。     

PANI/PAVC复合材料气敏性能的研究

以聚乙酸乙烯酯(PVAC)为掺杂剂,过硫酸铵(APS)为氧化剂,十二烷基苯磺酸(DBSA)为乳化剂,制备出稳定的聚苯胺/聚乙酸乙烯酯(PANI/PVAC)乳液状态的复合材料。经检测表明该复合材料稳定性好,在室温下对氨气有很好的灵敏度。利用单因素变量法系统考察了不同因素对乳化液稳定性及复合材料气敏性能的影响,并优化出最佳工艺条件:n(DBSA)∶n(An)=1.0;n(APS)∶n(An)=1.0;n(VAC)∶n(An)=1.0;聚合时间6 h;反应温度20℃,对含量1×10-3氨气的响应时间为300 s,恢复时间为240 s,灵敏度为56.082,适宜作为室温下的氨气敏感材料。利用红外光谱对该复合材料进行了结构表征。     

乳聚法制备聚苯胺复合膜及其电致变色性能研究

以十二烷基苯磺酸(DBSA)为掺杂剂,在非有机溶剂的两相体系中以聚乙烯醇(PVA)为成膜助剂,采用乳液聚合法合成了可直接用于制备电致变色膜的聚苯胺PAn/PVA乳液,用提拉成膜法制备了复合膜。研究了PVA含量、苯胺(An)与DBSA的量比、氧化剂过硫酸铵(APS)与An的量比及反应温度对膜的电致变色性、导电性的影响。结果表明:在w(PVA)为4.3%、n(An)∶n(DBSA)∶n(APS)=0.80∶1.00∶0.80、反应温度为5℃时,PAn/PVA复合膜具有较好的电致变色性及粘结性能。其本征态电化学活性的氧化峰电位范围出现在0.43V。     

DBSA掺杂聚苯胺的制备、表征及其导电性

采用过硫酸铵(APS)为氧化剂在十二烷基苯磺酸(DBSA)微胶束中化学氧化制备纳米棒状聚苯胺;DBSA既起乳化剂也起掺杂剂的作用。制备的掺杂聚苯胺用红外光谱(FTIR)、紫外光谱(UV-vis)、X-射线衍射(XRD)和扫描电镜(SEM)进行了表征;透射电镜(TEM)下首次观察到了聚苯胺的有序排列结构,晶面间距为5.99 Å。考察了掺杂剂/苯胺、氧化剂/苯胺的摩尔比和反应温度、时间等对聚苯胺电导率影响,最高电导率达到了0.72 S/cm。透射电镜怎能看到5.99     

聚苯胺-碳纤维导电纸的制备

采用改良的分步液相原位聚合法使得聚苯胺均匀生长在碳纤维纸基体上.考察了碳纤维质量分数、引发剂过硫酸铵(APS)与苯胺用量,以及浸渍时间和反应时间对聚苯胺-碳纤维导电纸导电性能的影响.采用SEM观察导电纸的微观形貌,利用FTIR与EDS分别表征其表面结构与元素变化.结果表明,当碳纤维质量分数为20％,引发剂APS浓度为0.375 mol/L,n(苯胺):n(盐酸,1 mol/L)=2:1,反应时间为12 h,浸渍时间为1 min时,制备的导电纸(PANI-CP)的导电性能最佳.相对于碳纤维原纸(CP),制备的PANI-CP电导率为5.435 S/cm,导电性能提高250.0％,抗张指数为27.665 N·m/g,抗张指数提高37.3％.相对于液相原位聚合法制备的导电纸(L-PANI-CP),PANI-CP导电性能提高85.9％,总色差值(DE)下降66.0％.     

催化剂制备与研究 石墨烯/聚苯胺复合材料的制备及其光催化性能

以苯胺和氧化石墨烯溶液为原料,采用乳液聚合法,根据m(氧化石墨烯)∶m(苯胺)为0∶10、1∶20和1∶10合成不同石墨烯/聚苯胺复合材料。采用紫外可见分光光度计、SEM、XRD及FT-IR对复合材料进行表征。XDR和FT-IR表明,乳液聚合合成了石墨烯/聚苯胺复合材料。SEM表明,聚苯胺以氧化石墨烯为载体,分散在其表面。光催化结果表明,石墨烯/聚苯胺复合材料的光催化性能较纯聚苯胺明显提高,m(氧化石墨烯)∶m(苯胺)=1∶20的石墨烯/聚苯胺复合材料的光催化性能高于m(氧化石墨烯)∶m(苯胺)=1∶10,原因可能在于微观结构的不同。     

Effect of dopant and oxidant on the electrochemical properties of polyaniline/graphite nanoplate composites

Optimizing the synthesis parameters of polyaniline/graphite nanoplate (PANI/GNP) composite is essential to the final electrochemical performance. Herein, the electrochemical properties of PANI/GNP composites, prepared by in situ chemical polymerization using varying amounts of different oxidants, with or without the addition of 4‐dodecylbenzenesulfonic acid (DBSA) as dopant, were investigated. Cyclic voltammetric results suggested that a stoichiometric amount of the oxidant iron chloride (FeCl₃) was beneficial to the electrochemical properties of the composites. The use of ammonium persulfate (APS) instead of FeCl₃ as oxidant largely increased the actual PANI content, conductivity and specific capacitance of the PANI/GNP composites. The dopant DBSA increased the conductivity of the PANI/GNP composites but did not show a positive effect on the electrochemical behavior. The cyclic voltammograms of the PANI/GNP composites indicated that the pseudocapacitance of PANI contributes more than the electrical double‐layer capacitance of GNP to the capacitance of the composites, while the presence of GNP plays an essential role in the rate capability of the composites. In this study, PANI/GNP (1:1) composite synthesized with an APS to aniline molar ratio of 1 showed a balanced combination of high specific capacitance (180.5 F g^?1 at 20 mV s^?1) and good rate capability (78% retention at 100 mV s^?1). © 2018 Society of Chemical Industry     

Fabrication of DBSA‐doped polyaniline nanorods by interfacial polymerization

An interfacial polymerization was used to fabricate dodecybenzenesulfonic acid (DBSA)‐doped polyaniline (DBSA‐PANI) nanorods with diameter range from 40 nm to 1 μm. The molar ratio of aniline to ammonium peroxydisulfate (APS), the concentrations of DBSA and reaction temperature had an effect on the morphology and size of products. It was found that lower concentration of DBSA and lower temperature will be helpful to the formation of rod‐like PANI nanostructures with a relative small diameter. UV–vis and FTIR measurements were used to characterize the chemical structure of the obtained samples. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

聚3,4-乙烯二氧噻吩/聚苯胺复合材料的制备与性能

以过硫酸铵(APS)和FeCl3为复合氧化剂,采用原位化学氧化聚合法合成了导电聚3,4-乙烯二氧噻吩/聚苯胺(PEDOT/PANI)复合材料,研究了苯胺浓度及加入时间、复合氧化剂配比和复合乳化剂配比对复合材料性能的影响,并对复合材料进行了分析. 结果表明,PEDOT/PANI复合材料合成的较佳工艺条件为：3,4-乙烯二氧噻(EDOT) 0.6 mol/L、复合氧化剂 0.6 mol/L(FeCl3:APS=1:2, mol)、复合乳化剂 0.4 mol/L(SDBS:CTAB=2:3, mol)、复合掺杂剂1.2 mol/L(H2SO4:SSA=4:1, mol)及苯胺0.8 mol/L, EDOT聚合2 h后加入苯胺溶液继续反应8 h. 复合材料的导电性、结晶性和热稳定性比纯导电聚合物好.     

Effect of dopant mixture on the conductivity and thermal stability of polyaniline/nomex conductive fabric

Electrically conductive polyaniline (PANI)/[poly(m‐phenylene isophthalamide)] Nomex composite fabric was prepared by in situ polymerization of aniline doped by a mixture of hydrochloride (HCl) and various sulfonic acids such as benzenesulfonic acid (BSA), sulfosalicylic acid (SSA), and dodecylbenesulfonic acid (DBSA); their effect on conductivity and physical properties were then investigated. PANI/Nomex composite fabrics doped by a mixture of protonic acids exhibited higher conductivity than those doped by other single dopants such as camphorsulfonic acid (CSA), p‐toluenesulfonic acid (TSA), BSA, SSA, and HCl. The conductivity of PANI/Nomex fabrics especially doped by a mixture of HCl and DBSA was evenly maintained up to 100°C without depression of mechanical properties of Nomex. Their conductivity was also maintained under extension of the composite fabric. In addition, electrical conductivity of PANI/Nomex fabrics was highly increased by ultrasonic treatment, which facilitated better diffusion and adsorption of aniline by cavitation and vibration. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2245–2254, 2002     

Facile preparation of conductive paint made with polyaniline/dodecylbenzenesulfonic acid dispersion and poly(methyl methacrylate)

We investigated an easy way to prepare industrially a conductive paint made with polyaniline (PANI)/dodecylbenzenesulfonic acid (DBSA) dispersion and poly(methyl methacrylate) (PMMA) in organic media. First, water‐dispersible PANI doped with DBSA was chemically synthesized with aniline sulfate using ammonium persulfate in water, and the resulting PANI/DBSA was readily extracted from the reaction medium with a mixture of toluene and methyl ethyl ketone (MEK) (toluene:MEK = 1:1 (v/v)), which is useful for industrial applications. The obtained PANI/DBSA organic dispersion was mixed with PMMA organic solution to give the corresponding PANI/DBSA conductive paint containing PMMA. A film prepared with the resulting PANI/DBSA conductive paint was found to possess relatively good conductivity and low surface resistivity for a conductive paint utilized for an electrostatic discharge even at low PANI/DBSA content in the PANI/DBSA–PMMA composite film (the conductivity and the surface resistivity were 9.48 × 10^?4 S cm^?1 and 3.14 × 10⁶ Ω cm^?2, respectively, when the feed ratio of PANI/DBSA:PMMA was 1:39 (w/w)). Furthermore, it was found that the conductivity of the film composed of PANI/DBSA–PMMA composite can be readily and widely controlled by the PANI/DBSA content of the composite or by the amount of DBSA used during the PANI/DBSA synthesis. The highest conductivity of PANI/DBSA–PMMA composite film (7.84 × 10^?1 S cm^?1) was obtained when the feed ratio of PANI/DBSA:PMMA was 1:4 (w/w). Copyright © 2007 Society of Chemical Industry     

Effects of FeCl3/ammonium persulfate composite oxidant and magnetic field on film growth rate of polyaniline doped with dodecylbenzenesulfonic acid

Polyaniline (PANI) doped with dodecylbenzenesulfonic acid (DBSA) was synthesized by emulsion polymerization using FeCl₃/ammonium persulfate (APS) as composite oxidant. The effects of different magnetic field (MF) intensities, the molar ratios of FeCl₃/APS, and the concentrations of DBSA on the film growth rate of PANI were analyzed by using a quartz crystal microbalance (QCM) technique. The film growth rate of PANI increased with increasing MF intensity and the concentration of DBSA. However, the film growth rate of PANI decreased with increasing molar ratio of FeCl₃/APS. The polymerization conditions were optimized tentatively by cyclic voltammetry (CV) testing. The peak currents and conductivity were the largest for PANI prepared under the following conditions: MF intensity 0.4 T, molar ratio of FeCl₃/APS 2:1, and concentration of DBSA 0.05 mol/L. The UV–Vis spectra of the PANI polymerization showed that the absorption intensity of PANI polymerized in the presence of MF was greater than that of PANI polymerized in the absence of MF, at the same reaction time.     

聚苯胺/聚乳酸复合纳米纤维表面形貌对生物相容性的影响

外加电场作用下聚苯胺能够调节细胞附着、增殖、迁移和分化,在体液环境下发生脱掺杂会使聚苯胺基导电可降解纳米纤维电活性减弱,但在一定程度上仍能促进细胞的黏附、生长和增殖。本文选择酒石酸作为聚苯胺在等离子体处理后的聚乳酸纳米纤维表面原位聚合过程中的酸掺杂剂,考察酒石酸与苯胺摩尔比分别在1∶1, 1∶2和1∶4下不同形貌的聚苯胺/聚乳酸复合纳米纤维对生物相容性的影响。采用SEM、TEM和FTIR表征聚苯胺形貌及化学成分,接触角评价其润湿性,MTT、ALP和免疫荧光染色评价聚苯胺/聚乳酸复合纳米纤维生物相容性。结果表明,酒石酸与苯胺摩尔比在1∶1、1∶2和1∶4下的聚苯胺形貌分别为纳米颗粒状、纳米纤维状和纳米空心管状,聚苯胺附着在聚乳酸纳米纤维表面,不会对静电纺丝的多孔结构基体产生影响;聚苯胺/聚乳酸复合纳米纤维表面润湿性良好,有助于细胞的黏附和生长;纳米纤维状的聚苯胺对生物相容性的增强效果明显优于纳米颗粒状聚苯胺,而纳米空心管状结构的聚苯胺对生物相容性增强作用更佳。