High-performance antioxidant behavior of zeolitic imidazolate framework-67 at low filler content in silicone rubber

被引：13
作者：
Gao, Qianhong [1 ]
Li, Ji [2 ,3 ]
He, Yangchun [1 ]
Zhao, Jianchang [2 ]
Li, Jianxi [4 ,5 ]
Shao, Dadong [1 ]
Wang, Minglei [2 ]
Hu, Jiangtao [2 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, 200 Xiaolingwei, Nanjing 210094, Jiangsu, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jialuo Rd, Shanghai 201800, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Natl Energy Life Evaluat & Management Technol Lab, Suzhou 215400, Peoples R China
[5] CGN DELTA Taicang Testing Technol Co Ltd, Suzhou 215400, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2021年 / 190卷
基金：
中国国家自然科学基金;
关键词：
Silicone rubber; ZIF-67; Antioxidant; X-ray absorption fine structure; ZIF-67; OXYGEN; DEGRADATION; OXYCARBIDE; GLASSES;
D O I：
10.1016/j.polymdegradstab.2021.109622
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The trade-off between increased heat resistance and deterioration of mechanical properties caused by excess heat-resistant additives limits the use of silicone rubber (SR) in cutting-edge applications and extreme conditions. In this study, a novel SR composite with ultrahigh thermal oxygen stability was developed by blending SR with a small amount of cobalt-based metal-organic framework (zeolitic imidazolate framework-67, ZIF-67). The addition of only 0.125-0.5 wt% (relative to the content of SR) of ZIF-67 to SR could effectively improve its thermal-oxidative stability. Specifically, after 12 days of aging, the retentions of elongation at break of ZIF-67/SR composite reached 28.3-60.7% of the original, while the maximum decomposition temperature of ZIF-67/SR was approximately 25-30 degrees C higher than that of pristine SR. The origin of these attractive characteristics of the ZIF-67/SR composites was investigated by carrying out electron spin resonance (ESR) and X-ray absorption fine structure (XAFS) analyses. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：9
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