石墨烯量子点可以减少由gamma射线照射的环氧树脂的氧化行为和机械损伤
Shengkai Liu1,2, Zhisong Li1, Jinxia Hou1
1Key Laboratory of Advanced Braided Composites, Ministry of Education, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China. xuzhiwei@tiangong.edu.cn.
Physical chemistry chemical physics : PCCP
|April 10, 2025
概括
石墨烯量子点 (GQD) 通过清除自由基,保护环氧树脂 (EP) 免受马射线损伤. 这提高了结构完整性,并提供实时氧化监测,提高了抗辐射能力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 环氧树脂 (EP) 的完整性因自由基的产生而在玛射线照射下降解.
- 传统的碳纳米材料提供有限的辐射保护.
- 石墨烯量子点 (GQD) 显示出具有优越抗辐射的潜力.
研究的目的:
- 研究石墨烯量子点 (GQD) 对环氧树脂对玛射线辐射的保护作用.
- 通过GQDs阐明辐射损害缓解的微观机制.
- 探索GQD在结构增强和损坏感应方面的双重功能.
主要方法:
- 在环氧树脂中加入1%重量的GQD.
- 高达1MGy的马射线辐射.
- 使用富里埃变换红外光谱学,微机械纳米沉积和光火的分析.
主要成果:
- 与纯EP相比,GQD/EP呈现出62.5%较薄的氧化物层,并保留了67%的初始机械强度.
- GQD/EP显示玻璃过渡温度增加了2.2°C,而纯EP则下降了.
- FTIR证实了GQD通过表面缺陷和捐赠来清除自由基,光灭表明过氧基中和化.
结论:
- 通过中和自由基,GQDs有效地减轻了环氧树脂中的玛射线诱导的损伤.
- 加入GQD可以提高机械性能和在辐射下的热稳定性.
- GQD提供结构增强和实时损坏感应的双重功能,使先进的抗辐射复合材料的设计成为可能.
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