权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Synthesis of Novel Functional Conductive Polymers in Supercritical Carbon Dioxide and their Properties

超临界二氧化碳中新型功能导电聚合物的合成及其性能

基本信息

批准号：
16550128
负责人：
YUASA Makoto
金额：
$ 2.37万
依托单位：
Tokyo University of Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

In this work, we have investigated the electrochemical synthesis of conductive polymers in homogenous supercritical condition. The effects of several factors such as pressure, phase behavior and mass transfer process for the obtained polymer film were examined.Thiophene was chosen as a model monomer to electropolymerize in supercritical carbon dioxide (scCO_2). The homogeneous supercritical state was confirmed by the observation of the phase behavior through a high-pressure cell with a viewing window. The conductive polymer film of thiophene synthesized in scCO_2 was characterized with cyclic voltammetry, SEM, Laser microscopy, AFM and four-point probe conductivity. The roughness of the film in that system was decreased with the further addition of CO_2. This result suggested that the low viscosity of scCO_2 play an important role in improving the transfer rate of solvent. The roughness of the film prepared in the homogeneous scCO_2/ acetonitrile (AN) system was reduced compared with t … More hat prepared in dichloromethane. The slow growth of the film and the high diffusion rate of the monomer seemed to account for the smooth and flat film formation. Other conductive polymers, polyaniline and polypyrrole, were successfully synthesized in a homogeneous scCO_2/ AN system.This electropolymerization system was extended to the polymerization of thienylporphyrin (H23ThTEtP) for the application as a superoxide sensor. The resulting film of H23ThTEtP was characterized using SEM, laser microscopy and AFM. It was revealed that the electropolymerized film in scCO_2 provided flatter, smoother and higher densified active sites than the one electropolymerized in organic solvent.The polymerized film as an electrocatalyst was applied to a superoxide sensor. The catalyst displayed selectivity and activity for the oxidation of 02・and showed a linear relationship between current and 02・concentration, which revealed the possibility of quantitative analysis of 02・in vivo. The catalyst showed higher sensitivity than the one electropolymerized in organic solvent. Less

本文研究了均相超临界条件下导电聚合物的电化学合成。考察了压力、相行为和传质过程等因素对聚合物膜的影响，并以硫脲为模型单体，在超临界CO_2中进行了电化学聚合。通过带观察窗的高压池观察相行为，证实了均相超临界状态。采用循环伏安法、扫描电镜、激光显微镜、原子力显微镜和四探针电导率等对在超临界CO2中合成的噻吩导电聚合物薄膜进行了表征。随着CO_2浓度的增加，膜层的粗糙度降低。这一结果表明，超临界CO_2的低粘度对提高溶剂的转移速率起着重要的作用。在均相超临界CO_2/乙腈（AN）体系中制备的薄膜表面粗糙度比在均相超临界CO_2/乙腈体系中制备的薄膜表面粗糙度小 ...更多信息在二氯甲烷中制备。膜的缓慢生长和单体的高扩散速率似乎是平滑和平坦的膜形成的原因。在均相scCO_2/ AN体系中成功地合成了聚苯胺和聚吡咯等导电聚合物，并将该体系推广到噻吩基卟啉（H23 ThTEtP）的聚合，以作为超氧阴离子传感器。使用SEM、激光显微镜和AFM表征所得的H23 ThTEtP膜。结果表明，在超临界CO_2中的电聚合膜比在有机溶剂中的电聚合膜具有更平整、更光滑、更致密的活性中心，并将其作为电催化剂应用于超氧离子传感器。该催化剂对O2·的氧化具有选择性和活性，且电流与O2·浓度呈线性关系，为O2·的体内定量分析提供了可能。该催化剂比有机溶剂中电聚合的催化剂具有更高的灵敏度。少