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石墨烯对聚甲基甲酸的关键电,光和磁性质的影响:基于分子建模的研究

Ernesto López-Chávez¹, Alberto Garcia-Quiroz², José Antonio Irán Díaz-Góngora³

¹Universidad Autónoma de La Ciudad de México, Fray Servando Teresa de Mier #92, Col. Obrera, Alc. Cuauhtémoc, C.P. 06080, Ciudad de Mexico, Mexico.

Journal of molecular modeling

|October 14, 2024

概括

这项研究设计了一种新的聚甲基甲烯酸-石墨烯 (PMMA-G) 纳米复合材料,揭示了光学,磁性和电气性质的显著变化. 石墨烯的结合改变了介电常数,增加了折射率,增强了磁性易感性,并提高了PMMA中的电阻.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术

背景情况:

一个新的聚合物结构,聚甲基甲酸-石墨烯 (PMMA-G),是通过将石墨烯 (G) 纳入聚甲基甲酸 (PMMA) 的方式设计的.
研究了PMMA-G的三种聚合度 (单体,二元,三元),以了解结构-性质关系.
该研究解决了对具有定制光学,磁性和电性质的新材料的技术需求.

研究的目的:

为了研究石墨烯结合对PMMA光学,磁性和电性质的影响.
为了评估压电常数,折射率,磁感应力和PMMA-G纳米复合材料的电阻力的变化.
确定PMMA-G作为高级技术应用的功能材料的相关性.

主要方法:

使用材料工作室 (MS) 软件进行计算建模,包括密度函数理论 (DMol3代码).
进行了几何优化,以确定PMMA和PMMA-G (50%石墨烯度) 最稳定的结构.
连接性指数和拓性质被用来计算介电常数,磁敏度,折射率和电阻.

主要成果:

石墨烯的加入降低了PMMA的介电常数.
在添加石墨烯后,PMMA的折射率增加了14.48%.
在PMMA-G中,摩尔磁感应的绝对值显著增加,电电阻率上升了近一个数量级.

结论:

石墨烯融入PMMA的过程从根本上改变了其光学,磁性和电气特性.
与纯PMMA相比,PMMA-G纳米复合材料具有增强的磁性和显著增加的电阻.
设计的PMMA-G材料显示出需要特定光学,磁性和电性能的应用的潜力.

关键词:

计算分子模拟计算模拟电气性质电气性质石墨烯是一种石墨烯.磁性属性磁性属性光学属性光学属性聚合物聚合物聚合物

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