Preparation of poly( o -phenylenediamine) nanoparticles with hydrolysed PEO 45 - b -P t BA 35 as template and its electrochemical properties

[摘要] Amphiphilic block copolymer poly(ethylene oxide)- b -poly(t ert -butyl acrylate) (PEO 45 - b -P t BA 35 ) from atom transfer radical polymerisation was hydrolysed to varying degrees through adjusting hydrolysis time. And the hydrolysis product poly(ethylene oxide)-b-poly(acrylic acid) (PEO 45 - b -PAA 35 ) was obtained and used as a template to synthesise nanostructured poly( o -phenylenediamine) (P o PD). The influence of hydrolysis degrees of PEO 45 - b -PAA 35 on the size and electrochemical properties of P o PD was investigated. Results showed that the P o PD particles have uniform sizes, and their size could be tuned with the hydrolysis degree of PEO 45 - b -PAA 35 . The average diameter and length of P o PD were less than 86 and 135 nm, and the size of these particles was increased with the increase of hydrolysis degree of PEO 45 - b -PAA 35 . Electrochemical characterisation proves that the particle with a smaller size had a better electrochemical activity. When the hydrolysis time was 12 h, the PoPD had the best specific capacitance compared with other samples. The discharge specific capacitance calculated by chronopotentiometric test of this sample is reached 809 F·g −1 at the current density of 0.5 A·g −1 .

[学科分类] 计算机科学（综合）

[关键词] capacitance;polymer blends;nanofabrication;current density;nanoparticles;electrochemistry;polymerisation;particle size;PEO45-b-PAA35;hydrolysis degree;poly(o-phenylenediamine) nanoparticles;hydrolysed PEO45-b-PtBA35;electrochemical properties;amphiphilic block copolymer;poly(ethylene oxide)-b-poly(tert-butyl acrylate);atom transfer radical polymerisation;hydrolysis product;poly(ethylene oxide)-b-poly(acrylic acid);nanostructured poly(o-phenylenediamine);particle size;electrochemical activity;discharge specific capacitance;chronopotentiometric test;current density;time 12.0 hour