Collaborative Research: Experimental and Computational Nanomechanics of the Load Transfer Mechanisms at the Graphene Polymer Interface

合作研究:石墨烯聚合物界面载荷传递机制的实验和计算纳米力学

基本信息

  • 批准号:
    1537333
  • 负责人:
  • 金额:
    $ 19.7万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2015
  • 资助国家:
    美国
  • 起止时间:
    2015-09-01 至 2019-08-31
  • 项目状态:
    已结题

项目摘要

Polymer nanocomposites show substantial property enhancements at much lower filler component weight as compared to conventional polymer composites. Graphene has been considered an ideal candidate for reinforcing additives in polymers due to its high stiffness and strength. However, there is a lack of fundamental understanding of strength properties of graphene-polymer interfaces. This collaborative research award supports fundamental research to provide mechanistic understanding of the stress-transfer processes across interfaces between selected polymers and graphene. These processes ultimately control the stiffness, strength, and toughness of graphene polymer nanocomposite. This research will contribute towards achieving light, strong, and tough polymer nanocomposite materials. Such advanced materials would impact the aerospace and automotive industries. The research crosses the disciplines of manufacturing, mechanics, materials science, and nanotechnology. Results from this multi-disciplinary research will be incorporated into existing undergraduate courses at both universities. The research results will also form the basis of a new lecture series for K-12 summar camp students introducing these potential future engineers to the topic of polymer nanocomposites as next generation aerospace materials. The strength characteristics of graphene-polymer interfaces play critical roles in the bulk mechanical response of graphene-based nanocomposites. Yet, the complex nanoscale phenomena occurring during shear deformation associated with the pull-out of graphene from the polymer matrix are not well understood. This collaborative research award supports investigations of deformation, load transfer and failure of graphene-polymer interfaces at the nanoscale. A combination of complementary experimental and computational methods is employed. The research team will perform pull-out tests on individual graphene sheets embedded within polymer matrixes using an unique in-situ nanomechanical characterization technique. The nanomechanical pull-out experiments will provide direct and quantitative measurements of the interfacial strength properties. These experiments represent a significant advancement over prior macroscopic measurements of the bulk composite properties where the graphene-polymer interfacial properties can only be inferred indirectly and qualitatively. In parallel, molecular dynamics simulations of the pull-out tests will be conducted at size-scales relevant to the experiments. This complementary approach facilitates comparison between the results of experiments and simulations. The simulations will provide insights into the fine graphene-polymer interfacial details not accessible by experiments, and will guide further experiments. This complementary experimental and computational effort will provide mechanistic understanding of the nanoscale interfacial strengthening processes, and decipher the roles of the size and morphology of the embedded graphene on the mechanical strength of graphene-polymer interfaces.
与常规聚合物复合材料相比,聚合物纳米复合材料在低得多的填料组分重量下显示出显著的性能增强。石墨烯由于其高刚度和强度而被认为是聚合物中增强添加剂的理想候选物。然而,对石墨烯-聚合物界面的强度性质缺乏基本的理解。该合作研究奖支持基础研究,以提供对选定聚合物和石墨烯之间界面的应力传递过程的机械理解。这些过程最终控制石墨烯聚合物纳米复合材料的刚度、强度和韧性。这项研究将有助于实现轻,强,坚韧聚合物纳米复合材料。这种先进的材料将影响航空航天和汽车工业。这项研究跨越了制造、机械、材料科学和纳米技术等学科。这项多学科研究的结果将被纳入两所大学现有的本科课程。研究结果还将成为K-12夏令营学生新系列讲座的基础,向这些潜在的未来工程师介绍聚合物纳米复合材料作为下一代航空航天材料的主题。 石墨烯-聚合物界面的强度特性在石墨烯基纳米复合材料的体相力学响应中起着关键作用。然而,在与石墨烯从聚合物基质中拉出相关的剪切变形期间发生的复杂纳米级现象尚未得到很好的理解。该合作研究奖支持在纳米级石墨烯-聚合物界面的变形,负载转移和失效的研究。互补的实验和计算方法相结合。研究小组将使用独特的原位纳米机械表征技术对嵌入聚合物基质中的单个石墨烯片进行拉拔测试。纳米力学拔出实验将提供直接和定量的界面强度性能的测量。这些实验代表了相对于本体复合材料性质的先前宏观测量的显著进步,其中石墨烯-聚合物界面性质只能间接和定性地推断。与此同时,将在与实验相关的尺寸尺度上进行拔出试验的分子动力学模拟。这种互补的方法有利于实验和模拟结果之间的比较。模拟将提供对实验无法访问的精细石墨烯-聚合物界面细节的见解,并将指导进一步的实验。这种互补的实验和计算工作将提供纳米级界面强化过程的机械理解,并破译嵌入式石墨烯的大小和形态对石墨烯-聚合物界面的机械强度的作用。

项目成果

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Changhong Ke其他文献

Terahertz time-domain spectroscopy of boron nitride nanotube-reinforced PMMA composites
氮化硼纳米管增强聚甲基丙烯酸甲酯复合材料的太赫兹时域光谱
  • DOI:
    10.1016/j.polymertesting.2025.108812
  • 发表时间:
    2025-06-01
  • 期刊:
  • 影响因子:
    6.000
  • 作者:
    Min Zhai;Feilin Gou;Changhong Ke;Wenlong He;Cong Zhai;Alexandre Locquet;D.S. Citrin
  • 通讯作者:
    D.S. Citrin
Sensitizing TRAIL response via differential modulation of anti- and pro-apoptotic factors by AZD5582 combined with ER nanosomal TRAIL in neuroblastoma.
AZD5582 联合 ER 纳米体 TRAIL 在神经母细胞瘤中通过抗凋亡因子和促凋亡因子的差异调节来敏化 TRAIL 反应。
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    2.5
  • 作者:
    Chaohong Huang;Y. He;Jianwu Sun;Qian Yuan;Shuyi Li;Huan Hou;Kui Su;Changhong Ke;Z. Du;Zhengqiang Yuan
  • 通讯作者:
    Zhengqiang Yuan

Changhong Ke的其他文献

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{{ truncateString('Changhong Ke', 18)}}的其他基金

Collaborative Research: Exploiting Nanoscale Interfaces to Enhance Bulk Mechanical Response of Additively Manufactured Boron Nitride Nanotube-Metal Composites
合作研究:利用纳米级界面增强增材制造氮化硼纳米管金属复合材料的整体机械响应
  • 批准号:
    2009134
  • 财政年份:
    2020
  • 资助金额:
    $ 19.7万
  • 项目类别:
    Standard Grant
MRI: Acquisition of an Integrated Scanning Probe - Raman Microscope
MRI:获取集成扫描探头 - 拉曼显微镜
  • 批准号:
    1429176
  • 财政年份:
    2014
  • 资助金额:
    $ 19.7万
  • 项目类别:
    Standard Grant

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