关于碳纳米管-聚甲基甲酸复合材料拉伸变形的原子学研究
Anshu Raj1, Sk Md Ahnaf Akif Alvi2, Khayrul Islam3
1School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019, USA.
Polymers
|July 14, 2023
概括
将单壁碳纳米管 (SWCNT) 添加到聚 (甲基甲酸) (PMMA) 中,可以显著提高复合材料的机械性能. 模拟探索了生物材料应用的不同SWCNT直径,体积分数和温度.
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:
- 聚合物/碳纳米管 (CNT) 复合材料由于CNT的添加,显示出增强的性能.
- 聚 (甲基甲酸) (PMMA) 是生物材料应用的有前途的聚合物,因为其生物相容性和无毒性.
- CNT-聚合物复合材料的性能在很大程度上取决于所选择的聚合物矩阵.
研究的目的:
- 通过分子动力学模拟,研究单壁碳纳米管 (SWCNT) 增强的PMMA复合材料的机械性能.
- 分析CNT直径,体积分数和温度对复合材料机械行为的影响.
- 评估这些SWCNT-PMMA复合材料在生物材料应用中的潜力.
主要方法:
- 使用反应力场的分子动力学模拟.
- 用不同的SWCNT直径 (0.542-1.08nm) 和体积分数 (8.1-16.5%) 进行模拟.
- 分析了温度 (100K-700K) 对断裂性的影响,以及的模量和相互作用能量的依赖于CNT直径.
主要成果:
- 加入少量SWCNT可显著提高PMMA矩阵的机械性能.
- 的模量和相互作用能量显示出对CNT直径的依赖.
- 断裂性随温度而变化,表明机械性能取决于温度.
- 在相同的模拟条件下,双壁碳纳米管的抗拉强度大约是SWCNT的两倍.
结论:
- 在先进的应用中,SWCNT增强提供了一种可行的策略来改善PMMA的机械特性.
- 该研究提供了针对特定环境条件和性能要求优化SWCNT-PMMA复合材料设计的见解.
- 对多壁碳纳米管的进一步研究可能会揭示机械强度的更大增强.
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