导电聚合物聚苯胺的化学合成

研究了导电聚苯胺化学合成的工艺条件及碳粉添加剂对聚笨胺产率及电导率的影响。用红外光谱及ＸＰＳ分析确定了化学合成聚笨胺的组成及结构为１／２氧化态的聚苯胺盐，它具有与电化学合成聚苯胺相同的结构和良好的电导率。     

可溶导电聚苯胺材料的合成研究

采用乳液聚合方法，合成有机大分子酸DBSA掺杂的可溶导电聚苯胺。探讨DBSA和引发剂用量对掺杂聚苯胺电导率及其溶解性的影响。合成了电导率较高和很好溶解性的导电聚苯胺材料，可以用作抗静电材料。     

聚苯胺盐的合成及导电性能研究

用对甲苯磺酸作为掺杂剂对聚苯胺(PANI)进行掺杂，合成了导电聚苯胺盐(ES)。研究了掺杂剂用量、模压压力、模压温度、氧化剂用量对聚苯胺盐电导率的影响。结果表明：随着掺杂剂用量的增加，PANI的电导率也在不断的增大；当ES所受压力较高时，电导率提高；高温使PANI电导率上升；氧化剂与苯胺的最佳配比为1：1。     

十二烷基苯磺酸掺杂聚苯胺的制备及性能

用十二烷基苯磺酸（DBSA）的水溶液对化学合成的聚苯胺（PAn)进行掺杂,获得了导电的DBSA掺杂PAn(PAn-DBSA),通过对本征态聚苯胺（PAnEB)掺杂率的计算和电导率的测定,研究了DBSA用量及其溶液浓度对掺杂效果的影响,结果表明,当DBSA／PAnEB(摩尔比）小于0．1时,溶液浓度的影响很小,当DBSA／PAnEB大于0．2时,溶液浓度的影响非常大,而且,高浓度比低浓度对提高掺杂率和电导率更有利。热重分析表明,PAnEB,PAn-DBSA在空气中的热分解温度分别为350和250℃,表现出良好的热稳定性。     

导电聚苯胺的合成与表征

采用微乳液聚合法,以苯胺为单体、十二烷基苯磺酸(DBSA)/盐酸(HCl)复合酸掺杂制备了导电聚苯胺,通过红外光谱对其结构进行了表征,考察了合成工艺条件对聚苯胺导电性能的影响,探讨了有机无机复合酸体系对聚苯胺热稳定性的影响。在复合酸十二烷基苯磺酸与盐酸物质的量比为3∶2、复合酸与单体物质的量比为2.0∶1、聚合温度为20℃、聚合时间为10h的优化条件下,所得到的掺杂态聚苯胺导电性能最佳。适当配比的有机无机复合酸掺杂后,导电聚苯胺的热稳定性显著提高。     

镨掺杂的聚苯胺及其性能的研究

以苯胺、硝酸镨合成了本征态聚苯胺和掺杂态聚苯胺.采用扫描电镜、导电测试仪、红外光谱、TGA和XRD等对产物进行表征.结果表明硝酸镨很好地掺杂于聚苯胺基体内,当硝酸错与苯胺的摩尔比为1:1.5时,产物的电导率较好,为0.015 5 S/cm.     

聚苯胺导电性能的研究进展

聚苯胺是应用最为广泛的导电高分子材料之一,也是一类具有特殊功能的新型材料;其在隐形材料、防腐材料、抗静电材料等方面都有应用。文中主要阐述了聚苯胺的结构、导电机理及不同酸掺杂和聚合法等多种因素对聚苯胺导电性的影响,同时也对导电聚苯胺的应用前景进行了展望。     

十二烷基苯磺酸掺杂聚苯胺的性能研究

用十二烷基苯磺酸 (DBSA)对本征态聚苯胺 (PAn)进行掺杂 ,得到溶解性、成膜性和光电性能俱佳的掺杂态聚苯胺。红外光谱研究表明 :DBSA掺杂PAn的吸收峰都向低频方向移动。探讨DBSA浓度、掺杂温度和时间以及洗涤滤液pH值对聚苯胺电导率的影响。结果表明 :当c(DBSA) =1 0mol/L ,T =32 3K ,t=8h ,洗涤滤液 pH =3时 ,聚苯胺的电导率为 0 90 9S/cm。紫外 -可见吸收光谱表明 ,掺杂态聚苯胺的吸收峰变宽而且发生红移。X射线衍射在 2θ =8 86°,1 7 7° ,2 1 4°和 2 6 7°处出现 4个较强的低角度衍射峰 ,表明DBSA掺杂的聚苯胺具有较强的结晶性能。     

聚苯胺导电复合材料的制备及性能研究

通过原位乳液聚合制备了PANI-HCI/P(MMA-BA)导电复合材料,对其导电率进行测试,并用FTIR、STA、XPS对导电复合材料的结构、热学性能、掺杂率进行了表征.结果表明:当APS/ANI摩尔比为1:1.5、反应单体中ANI为33%时,导电复合材料中PANI表面掺杂率为37.56%,复合材料电导率达到1.472×103S/cm.FTIR谱图表明导电复合材料分子结构中存在C=O、N=Q=N、N、-B-N等基团,说明共聚物P(MMA-BA)已经存在于复合材料中.STA测试结果表明:导电复合材料的玻璃化温度(Tg)为127℃,在270℃以下稳定性较好,通过原位乳液复合所得PANI-HCI/P(MMA-BA)导电复合材料的加工性及热稳定性能得到了改善.     

共混法制备聚苯胺导电发泡材料的性能研究

本文通过正交试验设计,验证了掺杂酸浓度、氧化剂用量、反应时间、反应温度等因素对聚苯胺性能的影响.并制备出产率可观、具备一定硬度、稳定的结构和较好导电性能的聚苯胺发泡材料.通过产率分析,电导率测试,电化学分析等手段对材料的合成条件和导电性能等进行了对比和研究.     

Synthesis and characterization of polyacrylamide–polyaniline conductive blends

Conducting poly(acrylamide) films were synthesized by exposing the polyacrylamide films impregnated with ammonium peroxodisulphate, an oxidizing agent, to hydrochloric acid vapor and then to aniline vapor. The effects of varying the exposure time to aniline vapor and the resulting composite films of polyacrylamide–polyaniline were characterized by different methods. The mode of conduction has also been studied. The conductivity of the resulting composites reached up to 10⁻⁵ s/cm². © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 841–844, 1998     

Synthesis and characterization of conductive polypyrrole with improved conductivity and processability

BACKGROUND: The solubility and conductivity of chemically synthesized polypyrrole (PPy) are dependent on the synthesis procedure and composition. Enhanced processability of PPy with high conductivity can be achieved using the anionic polyelectrolyte poly(styrene sulfonate) (PSS). RESULTS: High‐conductivity PPy with better processability was successfully synthesized by in situ chemical oxidation polymerization using various concentrations of PSS. Elemental analysis results show that the C/S and N/S molar ratios of the PPy fabricated in the presence of PSS are in good agreement with theoretical values for PPy–SO₄. The S/N ratio increases with increasing PSS content, indicating the high doping level for PPy as the PSS content increases. Scanning electron microscopy and high‐resolution transmission electron microscopy images show that the fabricated PPy has spherical structures with the average particle size for the pure PPy being about 250 nm and markedly decreasing to 20–40 nm with the addition of PSS. CONCLUSION: The conductivities of PPy synthesized with a PSS/pyrrole monomer weight ratio of 0.25 are about five times higher than that of PPy matrix. These results are perhaps due to the part played by PSS serving as a dopant to be incorporated into the PPy structure to improve the conductivity of the fabricated PPy. Copyright © 2009 Society of Chemical Industry     

Synthesis and characterization of ferromagnetic polyaniline with conductivity in an applied magnetic field

Ferromagnetic polyaniline (PANI) with conductivity was synthesized with peroxydisulfate as an oxidant and horseradish peroxidase as a catalyst in an N′‐a‐hydroxythylpiperazine‐N′‐ethanesulfanic acid buffer solution containing aniline, HCl, and NiCl₂·6H₂O in an applied magnetic field. The result of an electron paramagnetic resonance spectrum indicated that there were unpaired electrons in the resulting product, the spin density of which was 7.60 × 10¹⁹ spins/g. The curve of the magnetization versus the magnetic field showed that PANI had soft ferromagnetic behavior at about 300 K. The saturation magnetization and coercive force of PANI were 0.033 emu/g and 5 Oe, respectively. Ultraviolet–visible and Fourier transform infrared spectra indicated that there was interaction between Ni²⁺ and PANI chains but the structure of the backbone chains of PANI synthesized in the presence of a magnetic field hardly changed compared with that of PANI synthesized without NiCl₂·6H₂O. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

聚苯胺尼龙导电织物的制备及其传感性能

采用低温原位聚合法在尼龙织物表面形成一层聚苯胺导电材料，并用场发射扫描电子显微镜和显微拉曼成像光谱仪对其形貌及化学组成进行表征，用万用表和电化学工作站测试其导电性能。结果表明，聚苯胺聚合在尼龙织物的表面，赋予织物较好的导电性，织物电导率为31.62 S/m。聚苯胺尼龙织物的电阻随应变的增大而增大，当应变回复到初始状态时，织物电阻逐渐恢复并接近初始值，在3500次拉伸-回复循环后仍有96.2%的高循环稳定性。作为导电织物，聚苯胺尼龙织物具有良好的传感性能，在0~15%应变范围内可以准确监测人体的关节运动。同时，聚苯胺尼龙导电织物也具有热电性能，织物的塞贝克系数为8.406μV/K，有望作为温差传感器。     

聚苯胺的合成、表征及气敏性能研究

用化学氧化聚合法,以苯胺(An)为单体,过硫酸铵(APS)为氧化剂,控制反应温度,在酸性介质(无机酸和有机酸)中合成聚苯胺(PAn)。用傅里叶红外光谱(FTIR)和紫外可见光光谱(UV-Vis)对聚苯胺掺杂前后结构的变化进行了测试,讨论了酸掺杂对聚合产物结构的影响。结果表明电子的离域使聚苯胺主链结构经质子酸掺杂后形成了共轭结构。常温下,通过聚苯胺的气敏性能测试,得知有机酸掺杂的聚苯胺的气敏性能更好,其中用磺基水杨酸掺杂的聚苯胺对1000ppm氨气的灵敏度最高,达到了14.8580,具有实际应用价值。     

Ultrasonic characterization of conductive epoxy resin/polyaniline composites

This study presents the ultrasonic characterization of conductive epoxy resin (ER)/polyaniline (PANI) composites. The prepared PANI is mixed with ER matrix at weight percentages of 5%, 10%, and 15% for preparing the ER/PANI composites. The effects of PANI amount on the mechanical properties of ER/PANI composites are investigated by ultrasonic pulse‐echo‐overlap method. Also, electrical conductivity, ultrasonic wave velocity and ultrasonic micro‐hardness values of ER/PANI composites are correlated. Experimental results show that there is an excellent correlation between ultrasonic micro‐hardness and ultrasonic shear wave velocity. Also, the results of ultrasonic velocities and elastic constants values illustrate that the appropriate combination ratio is 95 : 5 for ER and PANI in ER/PANI composites. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42748.     

Preparation of polyaniline and studying its electrical conductivity

Polyaniline was prepared by chemical methods. Its electrical conductivity was measured. The electrical conductivity of polyaniline salt and polyaniline base were compared with composites prepared by the hot press of polyaniline base with KBr, Co(CH₃COO)₂, and picric acid. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 1658–1665, 2000     

DGEBA‐grafted polyaniline: Synthesis,characterization and thermal properties

The utilization of conducting emeraldine salt (PANI‐ES) and intrinsic leucoemeraldine polyaniline (PANI‐LEB) in the synthesis of DGEBA‐grafted PANI via anionic copolymerization is described. The structures of copolymers obtained were characterized by FTIR, ¹³C and ¹H NMR. The extent of grafting was verified by THF Soxhlet (solvent extraction). The thermal properties of these new copolymers were described and their conductivities were reported. Results obtained indicated that the graft copolymer exhibited higher electrical and thermal conductivities than that of the blend counterpart. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Synthesis and characterization of malonic acid-doped polyaniline

The conductive form of polyaniline was synthesized by the anodic and chemical oxidation of aniline in malonic acid medium. The conductivity of polyaniline doped with malonic acid changed from 1.62×10–6 to 2.5×10–5Scm–1 depending on the way it was synthesized. The polymer growth rate was observed to be very slow in malonic acid compared with H2SO4. Thermogravimetric data revealed that the maximum thermal reaction rate of PANI doped with malonic acid was at 200°C and 520°C compared with 290°C and 530°C of the polymer doped with H2SO4.