Rational design and preparation of the modified polyimide copolymer with superior anti-gamma irradiation

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-09-29 DOI:10.1016/j.porgcoat.2024.108838

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引用次数: 0

Abstract

To improve polymer-based bonded solid lubricating materials with excellent anti-gamma irradiation performance, a polyimide (BPI, Polyimide containing hexafluoropropane 2,2-bis(3-amino-4-hydroxyphenyl)diamine monomer) copolymer containing phenolic hydroxyl and trifluoromethyl groups was synthesized based on a conventional two-step method. Comparative studies have been conducted to investigate the effects of gamma irradiation on microstructure, thermal stability, mechanical and tribological properties under the different irradiation dose conditions. The results show that, compared with the pure polyimide (PI) and corresponding coatings, the modified BPI copolymer and coatings have better gamma-ray irradiation resistance duo to the copolymer contains lots of the activated phenolic hydroxyl groups and fluorine, which could be effectively inhibit the active destruction of parts of chain structure of copolymer, resulted in the BPI copolymer and BPI based coatings possess good comprehensive mechanical and tribological properties after 1000 kGy gamma irradiation. This study provides a novel approach for the design and preparation of lubricating coatings for nuclear energy systems.

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具有优异抗伽马辐照性能的改性聚酰亚胺共聚物的合理设计与制备

为了改进聚合物基粘结固体润滑材料，使其具有优异的抗伽马辐照性能，采用传统的两步法合成了一种含有酚羟基和三氟甲基的聚酰亚胺（BPI，含有六氟丙烷-2,2-双（3-氨基-4-羟基苯基）二胺单体的聚酰亚胺）共聚物。对比研究了不同辐照剂量条件下伽马辐照对微观结构、热稳定性、机械性能和摩擦学性能的影响。结果表明，与纯聚酰亚胺（PI）和相应的涂层相比，改性 BPI 共聚物和涂层具有更好的耐伽马射线辐照性能，这是因为共聚物中含有大量活化的酚羟基和氟，能有效抑制共聚物链结构部分的活性破坏，从而使 BPI 共聚物和基于 BPI 的涂层在 1000 kGy 伽马辐照后具有良好的综合力学性能和摩擦学性能。这项研究为核能系统润滑涂层的设计和制备提供了一种新方法。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.