吡咯/3-氨基苯磺酸半导体共聚物纳米颗粒的制备

Synthesis and characterization of pyrrole/3-aminobenzenesulfonic acid semiconductive copolymer nanoparticles

采用简单的化学氧化聚合法在无外加稳定剂的条件下成功地合成了自稳定性的吡咯/3-氨基苯磺酸半导体共聚物纳米颗粒。紫外和红外光谱的分析结果证实吡咯和3-氨基苯磺酸之间确实发生了共聚。3-氨基苯磺酸投量对共聚物颗粒的产率、电导率、尺寸及分布有明显影响。当其投量为30mol%时,共聚物颗粒表现出最小的平均粒径(约80nm)和相对较高的产率及电导率。电镜表征的结果表明共聚物纳米颗粒呈现不规则的粒状形貌且尺寸分布比较均一。共聚物纳米颗粒的形成和自稳定性与颗粒表面电负性磺酸基的静电排斥效应和亲水性有关。

Self-stabilized semiconductive copolymer nanoparticles were successfully synthesized by a facile chemical oxidative polymerization of pyrrole and 3-aminobenzenesulfonic acid without any external stabilizer. UV-vis and FT-IR spectra indicated that a copolymerization indeed occured between 3-aminobenzenesulfonic acid and pyrrole. The polymeriza tion yield, bulk electrical conductivity and size of the copolymer particles were significantly influenced by the feed ratio of 3- aminobenzenesulfonic acid. The copolymer exhibited the smallest diameter of about 80nm and relatively high yield and elec trical conductivity with 3-aminobenzenesulfonic acid feed ratio of 30mo1%. The copolymer nanoparticles were found that had irregular granular morphology with relatively narrow size distribution by FE-SEM and TEM. The formation and intrinsic self-stabilization of the copolymer nanoparticles were proposed based on the powerful static repulsion and hydrophilicity from negatively charged sulfonic groups on the nanoparticles.