用POSS对石墨烯氧化物进行非共价功能化,以改善环氧复合材料的机械性能
Ting Xu1, Yumin Jiao2, Zhenglian Su1
1College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China.
Polymers
|December 23, 2023
概括
多面寡合物丝素 (POSS) 功能化石墨烯氧化物 (GO) 增强了环氧 (EP) 复合材料. 该POSS-GO/EP材料由于均分散和有效的裂纹偏移而表现出更好的机械性能.
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:
- 石墨烯氧化物 (GO) 是复合材料增强的一种有前途的纳米材料.
- 聚合GO板块的聚合阻碍了其在聚合物矩阵中的有效分散和性能.
- 非共价函数化提供了一种改善GO分散和兼容性的方法.
研究的目的:
- 为增强型环氧复合材料开发一种非共功能化的石墨烯氧化物 (POSS-GO).
- 研究POSS-GO对环氧复合材料的形态,分散和机械性能的影响.
- 为了阐明POSS-GO在环氧矩阵中的强化机制.
主要方法:
- 通过π-π合,将GO与多面寡合物丝素 (POSS) 的非共价功能化.
- 使用造成型制备POSS-GO/环氧 (EP) 复合材料.
- 表面形态,分散,机械性能和横截面形态的表征.
主要成果:
- 通过增加层间间距和硬质障碍,POSS修改阻止了GO板块的聚合.
- 在EP矩阵内,POSS-GO表现出更好的分散.
- 0.4phr的POSS-GO/EP复合材料显示出最佳的机械性能,包括增强的裂偏移,塑性变形和界面应力转移.
结论:
- GO与POSS的非共价功能化有效地改善了EP中的GO分散.
- 这些POSS-GO/EP复合材料表现出卓越的机械强度和性.
- 独特的形态和增强的界面相互作用有助于提高POSS-GO/EP复合材料的性能.
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