分子结构数据和优化氧化石墨烯量子点和环氧接口以及机械性能的建模路线图.
Prathamesh Deshpande1, Robert Chan-Jobe1, Ozgur Keles1
1San Jose State University, 1 Washington Sq., San Jose, CA 95192, United States.
Data in brief
|December 19, 2024
概括
功能化石墨烯量子点 (GQD) 增强了环氧复合材料,提高了强度和刚性. 分子动力学模拟显示,氧化GQD可使机械性能增强56%的强度和18%的刚度.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 聚合物科学 聚合物科学
背景情况:
- 混合环氧复合材料为低密度应用提供了出色的特定强度和刚性.
- 像碳纳米管 (CNT) 和石墨烯 (GNPs) 这样的纳米填充剂增强了环氧矩阵,但面临着诸如聚合和空隙等制造挑战.
- 由于其小尺寸,石墨烯量子点 (GQD) 是一个有前途的替代方案,可以实现密切的矩阵接触,同时提高刚性,强度和性.
研究的目的:
- 使用分子动力学 (MD) 建模嵌入在环氧矩阵中的单个功能化GQD的机械反应.
- 调查不同基于氧的功能组对GQD-环氧纳米复合材料特性的影响.
- 量化功能化GQDs可实现的机械性能改进.
主要方法:
- 开发一个分子动力学 (MD) 工作流程,以模拟一个在环氧矩阵内的功能化GQD.
- 在GQD上创建了十种不同的化学物质,具有不同的基于氧的功能组.
- 单轴应变模拟以评估机械响应和性能增强.
主要成果:
- 用氧基组对GQD的功能化显著改善了与环氧矩阵的界面相互作用.
- 模拟显示氧化GQD-环氧纳米复合材料的最大强度增加为56%.
- 在纳米复合材料与氧化GQD中观察到18%的刚度增加.
结论:
- 功能化石墨烯量子点是有效的纳米填充剂,用于增强环氧复合材料的机械性能.
- 功能化的GQD提供的亲密接触和超分子相互作用,如键,可以缓解常见的制造问题.
- 氧化GQD特别有望在以环氧基纳米复合材料中最大限度地提高强度和刚度.
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