聚吡咯导电复合膜的研制

吡咯（Ｐｙ）在含有聚甲基丙烯酸甲酯（ＰＭＭＡ）的乙酸乙酯溶液中以三氯化铁（ＦｅＣｌ３）作为氧化剂进行原位化学氧化聚合，制备了可溶性的聚吡咯（ＰＰｙ）／ＰＭＭＡ导电复合材料，利用浇铸成膜的方法制得了导电复合薄膜材料，该薄膜（含Ｐｙ４０ｗｔ％）的电导率可达３２７ｓ．ｍ＾－１（标准四电极法）并且在室温下的空气中有良好的稳定性，对影响聚合反应的诸因素（温度，时间，反应体系等）进行了探讨，确定了最佳的聚合反     

取代聚吡咯自掺杂导电机理的理论研究

自掺杂导电高分子材料均溶于水,其水溶液容易在各种基质上浇注成膜,且加工方便,因而引起了人们的极大兴趣,然而有关其理论研究尚未见报道。 聚3-甲基-4-羧酸吡咯(PMPC)是水溶性自掺杂导电高分子材料中的一种,它可由3-甲基     

纳米聚吡咯的合成

分别以十六烷基三甲基溴化铵,十二烷基苯磺酸钠,聚乙烯吡咯烷酮,十二烷基硫酸钠形成的有序聚集体为模板,在0℃-5℃引发吡咯氧化聚合(过硫酸铵为氧化剂)制备了纳米聚吡咯(PPy).探讨了表面活性剂对PPy形貌的影响.     

气相氧化聚合制备聚合物／聚吡咯表面复合导电材料

将填充有ＦｅＣｌ３的苯乙烯－丙烯腈共聚物，用ＦｅＣｌ３的乙醇溶液浸泡处理后，置于吡咯气氛中，制得聚合物／聚吡咯表面复合导电材料。研究了苯乙烯－丙烯腈中ＦｅＣｌ３含量，ＦｅＣｌ３／乙醇溶液浓度，浸泡时间，聚合反应时间对材料电导率的影响。用扫描电镜观察了导电层的表面结构并测定了导电性的稳定性。导电材料最高电导率达４．８×１０３Ｓ·ｍ－１，在干燥气氛下可稳定１８个月以上。     

电聚合导电聚吡咯的合成研究

用电化学法将吡咯单体聚合在电极上，于不同支持电解质的水溶液中得到聚吡啶薄膜。研究了电解质浓度、电解质阴离子种类及聚合时间对聚吡咯薄膜导电性能的影响。     

导电聚吡咯的研究

介绍了1995年获国家自然科学二等奖项目“导电聚吡咯的研究”（主要完成人：钱人元、李永舫、毕先同、裴启兵、鄢宝珍）的主要研究成果以及获奖后的研究新进展,涉及的研究内容包括导电聚吡咯的电化学聚合过程和机理、导电聚吡咯的结构、稳定性、电化学性质以及导电聚吡咯复合材料的制备等。     

聚吡咯(PPY)/聚己内酰胺(Nylon 6)——导电复合材料的研究

本文用电化学氧化聚合的方法制备出了既具有优良的导电性能又具有良好机械性能的聚吡咯(PPY)/聚己内酰胺(Nylon 6)的复合材料,该复合材料的导电率可达119s/cm,并对聚吡咯/聚己内酰胺导电复合材料进行了扫描电子显微镜、电导率及机械性能的测试及表征。     

壳层可控导电聚吡咯/聚苯乙烯复合微球及聚吡咯中空微胶囊的制备

在导电聚合物含量较小时,含核壳结构的导电聚合物复合粒子就可以具有和本体相当的导电率,且加工性好,近年来这种核壳结构微粒的制备已引起了科学家们的广泛关注．Armes等[制备了导电聚吡咯、导电聚苯胺包覆聚苯乙烯的核壳结构胶体粒子及聚苯胺和二氧化硅的纳米复合物．刘正平等用改进的方法在粒径为116nm的单分散聚苯乙烯乳胶粒子上包覆聚吡咯,     

聚乙烯醇/聚吡咯复合导电水凝胶应变传感器的制备及性能

以聚乙烯醇(PVA)为原料, 植酸(PA)和氨基-聚倍半硅氧烷(NH₂-POSS, NP)为交联剂, 通过冻融循环法制得PVA/PA/NP复合水凝胶, 再以其为模板, 通过吡咯的原位聚合制得PVA/PA/NP-PPy复合导电水凝胶, 克服了聚吡咯材料易脆、 疏水的特性, 进一步改善了水凝胶的导电性和灵敏性. 循环拉伸实验结果表明该水凝胶具有良好的自回复能力, 电导率高达7.53 S/m, 从I-V曲线可知其作为柔性可穿戴应变传感器的最高检测电流可达 9.029 mA, 灵敏度因子可达6.796, I-T曲线表明该传感器可以准确地通过电流信号变化来监测人体的各种微小运动.     

超临界二氧化碳流体环境中导电聚吡咯复合材料的制备

以聚苯乙烯(PS)和锌盐中和的磺化聚苯乙烯(Zn-SPS)膜为基体, 在超临界二氧化碳(SC-CO₂)环境中用化学氧化法原位制备了聚吡咯(PPy)导电复合材料. 由于SC-CO₂对聚合物基体的强溶胀作用, 吡咯分子高效地扩散到基体内部进行聚合而形成导电通路, 得到比传统的水溶液法更高的电导率. 聚合物基体的性质对复合材料的导电性和形貌产生重要影响. 在相同条件下, Zn-SPS/PPy的电导率比PS/PPy高3~4个数量级, 而它们的体积逾渗阈值分别为2.7%和6.2%, 远远低于理论预测值(16%).     

Effects of Reaction Sequence on the Colloidal Polypyrrole Nanostructures and Conductivity

The relationship between nanoscaled morphology and macroscopic electrical conductivity of polypyrrole (PPy) nanostructures was qualitatively investigated. The PPy nanostructures were prepared via microemulsion polymerization using ionic surfactants. The morphology of PPy was influenced by both the type of ionic surfactants and reaction sequences; specifically, the PPy structures were highly influenced by the reaction sequence when anionic surfactant of SDS was used. By changing reaction sequence, a gel-like PPy was formed influencing on the macroscopic electrical conductivity. The results indicate that the macroscopic conductivity of PPy is affected by its nanoscaled structures as determined by the reaction conditions.     

Electrochemical Synthesis and Characterization of Electroactive Conducting Polypyrrole Polymers

Conducting/electroactive polypyrrole polymers are synthesized electrochemically on glassy carbon in various electrolytes (counterions). The polymers' electroactivity is measured using cyclic voltammetry. The electrolytes are chloride, nitrate, p-toluene sulfonate, dodecyl sulfate, and dodecylbenzenesulfonate of sodium and potassium ferrocyanide. It is found that the electrolyte (dopant) markedly affects the redox behavior of the polypyrrole films.     

过渡金属一取代Keggin结构钼磷酸盐掺杂的聚吡咯的制备、表征与导电性研究

０引言有机高分子－多酸导电聚合物是８０年代末兴起的一类新型有机－无机杂化材料。由于它兼有无机组分和有机聚合物基块的性能，并能衍生出新的导电性、光学性、耐摩擦、力学性能、功能梯度等，它现已成为材料科学和化学科学研究的前沿课题之一犤１犦。多酸是一类含有氧桥的多核配合物，具有强酸性、强氧化性、优良的催化活性、光致变色、电致变色性及高质子导电性等，可作为构建有机－无机杂化材料的基块犤２，３犦。聚吡咯是一类有机高分子，其合成简便、空气稳定性好、易于掺杂，通过掺杂可形成高电导率的高分子材料。若将多酸掺杂聚吡…     

聚吡咯薄膜的电特性

含有不同的链长的w-吡咯烷基二甲基氯硅烷作为粘合剂通过自组装（SAMs）吸附于二氧化硅表面,然后聚吡咯膜化学沉积于该粘合剂修饰的表面。化学沉积的聚吡咯膜的表面形貌用扫描电镜（SEM）及原子力显微镜（AFM）表征。除短链外不同链长的粘合剂对聚吡咯膜的厚度影响不大。聚吡咯膜的电特性用电流-电压表征。结果显示电流与粘合剂的链长无关。电特性表明载流子迁移率为1.4 ´ 10-4 cm2×V-1.s –1。     

Synthesis and Characterization of Polyvinylferrocene/Polypyrrole Composites

Conducting polymer composites of polyvinylferrocene and polypyrrole (PVF/PPy) were synthesized chemically by the in situ polymerization of pyrrole in the presence of PVF using FeCl₃ as oxidant. Acetic (CH₃COOH) and boric (H₃BO₃) acids were used as the synthesis medium. Effects of the synthesis medium on the properties of the PVF/PPy composite were investigated. The PVF/PPy composites and homopolymers were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and magnetic susceptibility techniques. Conductivity measurements were performed using the four‐probe technique. We found that the conductivities of PVF/PPy‐H₃BO₃ (1.19 S cm^?1) and PVF/PPy‐CH₃COOH (4.5×10^?1 S cm^?1) increased relative to those of the homopolymers of PPy‐H₃BO₃ (2.1×10^?2 S cm^?1) and PPy‐CH₃COOH (1.2×10^?2 S cm^?1) due to the interaction of PVF with the pyrrole moiety. The stability of all homopolymers and composites were investigated by thermogravimetric analysis and by conductivity measurements during heating‐cooling cycles. There was a small drop in conductivity caused by the annealing of PVF/PPy composites at 70°C. The conductivity of all samples increased with temperature and exhibited stable electrical behavior with increasing temperature. TGA analysis of samples showed that the composites were more stable than the homopolymers or PVF separately. The magnetic susceptibility values of samples were negative, except for PVF/PPy‐H₃BO₃. Morphology changes of the composites investigated by scanning electron microscopy (SEM), attributed to synthesis conditions, have a significant effect on their conductivity.     

Reactive Template Synthesis of Polypyrrole Nanotubes for Fabricating Metal/Conducting Polymer Nanocomposites

Unique nanocomposites of polypyrrole/Au and polypyrrole/Pt hybrid nanotubes are synthesized employing polypyrrole (PPy) nanotubes as an advanced support by solution reduction. The conducting polymer PPy nanotubes are fabricated by using pre‐prepared MnO₂ nanowires as the reactive templates. MnO₂ nanowires induce the 1D polymerization of pyrrole monomers and the simultaneous dissolution of the templates affords the hollow tube‐like structure. The loading content of metal nanoparticles in the nanocomposites could be adjusted by simply changing the amount of metal precursors. This work provides an efficient approach to fabricate an important kind of metal/conducting polymer hybrid nanotubes that are potentially useful for electrocatalyst and sensor materials.     

Synthesis and Characterization of Conductive Polypyrrole/Montmorillonite Nanocomposites via One-pot Emulsion Polymerization

A series of electrically conductive polypyrrole/clay nanocomposites were synthesized in this work by using one-pot emulsion oxidative polymerization of pyrrole in the presence of unmodified clay and using DBSNa as the surfactant. The effect of surfactant on the morphological and electrical properties of PPy also were investigated and discussed in some extent. Electrical conductivity of the samples was measured by using samples in which the conductive materials was sandwiched between two Ni electrodes at room temperature. PPy/MMT nanocomposites were characterized by using XRD, TEM, TGA and DSC means of investigation. Intercalated structures were determined for the nanocomposites as confirmed by XRD and TEM studies. Electrical conductivity of the nanocomposites was measured to be dependent to the clay content, and the methods of preparation. Measurement also showed that polymerization of pyrrole monomers pre-intercalated between the clay gallery spaces of the clay led to higher conductivity for the nanocomposite in the same level of clay content. Thermal property measurements showed a lower thermal decomposition rate for the PPy/MMT nanocomposites with respect to the PPy.     

Bio‐Inspired Dopamine Functionalization of Polypyrrole for Improved Adhesion and Conductivity

We report the functionalization of polypyrrole (PPy) with a “sticky” biomolecule dopamine (DA), which mimics the essential component of mussel adhesive protein. PPy is one of the most promising electrically conductive polymers with good biocompatibility. The research findings reveal that the DA functionalization enhances the dispersibility and stability of PPy in water and its film adhesion to substrate surface significantly. The electrical conductivity of PPy increases to a maximum value and then decreases with the increasing DA concentration. An optimal DA to pyrrole (Py) mole ratio is found to be between 0.1 and 0.2, at which both conductivity and adhesion of DA‐functionalized PPy has been improved.