Synthesis and characterization of 4-pyridine-bridge polybenzimidazolefor proton exchange membranes

IF 1.8 4区化学 Q3 POLYMER SCIENCE High Performance Polymers Pub Date : 2023-06-07 DOI:10.1177/09540083231181926

Yashesh J Rathwa, Navin P. Chikhaliya

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Abstract

A series of polybenzimidazoles (PBIs) incorporated main chain 4-pyridine bridge groups were synthesized from 4,4′-([4,4′-bipyridine]-2,6,-diyl)bis (benzene-1,2-diamine) which reacted with four different diacids like isophthalic acid,4,4′-Oxibis benzoic acid, 5-amino isophthalic acid and 2,5-pyridine dicarboxylic acid using polyphosphoric acid as solvent. A process termed dispersion polymerizationhas been developed to prepare PBIs.For the membranepreparation, 4-pyridine-bridge polybenzimidazole (Py-PBI) productswere re-dissolved in dimethyl sulfoxide and cast. The polymer structure characterization included FT-IR, UV, Powder XRD, Water Uptake, Swelling Ratio, Ion exchange capacity, Acid doping, Acid leaching, Oxidative stability, and Polymer inherent viscosity find out by using Ubbelohde viscometer whilethermal stability assessments via thermogravimetric analysis. The Py-PBI-based polymer electrolyte membranes’ mechanical properties measurement showed that the 4-pyridine-bridge PBIs membranes were flexible, thermally stable, and mechanically strong when compared with conventional PBI. The current-voltage (I-V) characteristics of the 4-Py-PBI membrane show that the conductivity of the 4441P membrane is 0.546 S cm−1. Graphical Abstract

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质子交换膜用4-吡啶桥聚苯并咪唑的合成与表征

以4,4′-([4,4′-联吡啶]-2,6，-二酰基)二(苯-1,2-二胺)为原料，以多磷酸为溶剂，与异苯二甲酸、4,4′-氧化二苯甲酸、5-氨基异苯二甲酸和2,5-吡啶二甲酸等四种不同的二酸反应，合成了一系列含有主链4-吡啶桥基的多苯并咪唑(ppi)。一种称为分散聚合的方法被开发出来制备pbi。4-吡啶桥聚苯并咪唑(Py-PBI)产物在二甲亚砜中再溶解并浇铸。聚合物的结构表征包括FT-IR、UV、粉末XRD、吸水率、溶胀比、离子交换容量、酸掺杂、酸浸、氧化稳定性、聚合物固有粘度等，通过Ubbelohde粘度计进行表征，热稳定性通过热重分析进行评价。对py -PBI基聚合物电解质膜的力学性能测试表明，与传统的PBI相比，4-吡啶桥式PBI膜具有柔韧性、热稳定性和机械强度。4-Py-PBI膜的电流-电压(I-V)特性表明，4441P膜的电导率为0.546 S cm−1。图形抽象

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.