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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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基于聚乙烯基的机械色象包装

Bratati Das1, Yu Uchikura1, Naoji Matsuhisa1

  • 1Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba Meguro-ku, Tokyo 153-8505, Japan.

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|December 10, 2024
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概括

这项研究引入了机械色调的黑包装,该包装改变颜色以显示损坏. 一个移动应用程序量化压力,使电子产品和疫苗等敏感物品的运输更安全.

关键词:
强力传感器是一种强力传感器.摩擦力显微镜 摩擦力显微镜机色聚合物的机色聚合物.聚乙乙烯是一种多乙烯.有关定量校准的定量校准.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 机色材料提供视觉损伤指示.
  • 聚乙烯 (PDA) 在应对机械应力时表现出颜色转变.
  • 包装中的定量压力传感仍然是一个挑战.

研究的目的:

  • 开发一种机械色色的黑包装系统,用于定量损害可视化.
  • 为了使用移动应用程序进行压力测量.
  • 提高敏感货物运输的安全性和可靠性.

主要方法:

  • 使用的聚乙烯 (PDA) 嵌入机色特性矩阵中.
  • 通过结合客分子来调整PDA灵敏度.
  • 校准了定量压力读数的颜色转换.
  • 开发了一个用于RGB图像分析的移动应用程序 ("压力分析应用").
  • 使用双重摩擦力/光显微镜和摩擦测试仪来表征力灵敏度.
  • 研究了扫描速度对力敏感性的影响.

主要成果:

  • 在基于PDA的包装中展示了蓝色到红色的色彩转变,与施加的压力相关.
  • 达到30-100nN (纳米尺度) 和0.7-2.2N (宏观尺度) 的强力灵敏度.
  • 识别了扫描速度作为一个关键参数,更高的速度 (超过50mm/s) 产生6.45倍的强力灵敏度.
  • 通过移动应用程序从RGB图像中验证了定量压力读数.

结论:

  • 开发的机色包装为可视化和量化机械损坏提供了可靠的方法.
  • 通过调整PDA矩阵组合,可以调整系统的灵敏度.
  • 移动应用程序集成允许方便地在现场进行压力评估.
  • 这项技术在改善电子产品,医疗用品和食品安全运输方面具有重大潜力.