• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Modeling Friction, Wear and Lubrication of Sliding Polyurethane and Polycarbonate Surfaces Representing Printer Components with Molecular Dynamics.
【24h】

Modeling Friction, Wear and Lubrication of Sliding Polyurethane and Polycarbonate Surfaces Representing Printer Components with Molecular Dynamics.

机译：用分子动力学模拟代表打印机组件的滑动聚氨酯和聚碳酸酯表面的摩擦，磨损和润滑。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Xerox Research Centre of Canada has noted that elastomeric cleaning blades in laser printers have a relatively short life expectancy, as they experience high levels of friction and wear while wiping excess toner from commercial photoconducting drums. As such, there has been interest in examining the behaviour related to friction, wear and lubrication of components in laser printers. Molecular dynamics simulations were employed to gain molecular-level insight into the mechanism of wear of the cleaning blade and the effectiveness of lubricants in reducing friction forces. The Dreiding force field was chosen to simulate representations of the photoconducting drum, cleaning blade and the lubricant. They were modeled in bulk and layered forms, and compressed and sheared to examine slip mechanisms and evaluate shear stresses and friction coefficients. It was found that the polycarbonate (PC) component was significantly stronger than either the polyurethane (PU) or octadecane (C18) components, and that the introduction of an interface and/or C18 lubricating material lowered the measured shear strengths to various degrees. The simulations indicated three different slip mechanisms depending on the nature of system. We have observed that shearing may induce structural changes within the PU component (such as ordering) even without a local slip event, which likely contributes to the eventual mechanical failure of the PU cleaning blade. From the models used in this study, it appears that more lubricating material is required than is currently used in practice in order to prevent wear of the PU cleaning blade. As well, the shear strengths and friction coefficients are not significantly reduced with the addition of lubricant for models containing PU. This is, of course, subject to the limitations of the simulations performed.
机译：加拿大施乐研究中心指出，激光打印机中的弹性清洁刮板的预期寿命相对较短，因为它们在擦拭商业光导鼓中多余的碳粉时会经历高水平的摩擦和磨损。因此，人们对检查与激光打印机中的部件的摩擦，磨损和润滑有关的行为感兴趣。分子动力学模拟被用来获得清洁刮板磨损机理和润滑剂在减少摩擦力方面的有效性的分子水平的见解。选择Dreiding力场来模拟光电导鼓，清洁刮板和润滑剂的表示。它们以散装和分层的形式建模，然后压缩和剪切以检查滑移机理并评估剪切应力和摩擦系数。发现聚碳酸酯（PC）组分明显比聚氨酯（PU）或十八烷（C18）组分强，并且界面和/或C18润滑材料的引入将测得的剪切强度降低了不同程度。仿真表明了三种不同的滑移机制，具体取决于系统的性质。我们已经观察到，即使没有局部打滑事件，剪切作用也可能导致PU组件内部发生结构变化（例如排序），这很可能会导致PU清洁刀片最终发生机械故障。从本研究中使用的模型来看，为了防止PU清洁刮板的磨损，似乎需要比目前实际使用更多的润滑材料。同样，对于包含PU的模型，添加润滑剂不会显着降低抗剪强度和摩擦系数。当然，这受到所执行模拟的限制。

著录项

  • 作者

    Carkner, Carolyn Joy.;

  • 作者单位

    Queen's University (Canada).;

  • 授予单位 Queen's University (Canada).;
  • 学科 Chemistry Physical.
  • 学位 M.S.
  • 年度 2013
  • 页码 139 p.
  • 总页数 139
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号