Connection between Molecular Interactions and Mechanical Work of Adhesion,ACS Macro Letters

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Connection between Molecular Interactions and Mechanical Work of Adhesion
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-10-25 , DOI: 10.1021/acsmacrolett.2c00499
Babu Gaire ₁ , Michael C Wilson ₁ , Saranshu Singla ₁ , Ali Dhinojwala ₁

Affiliation

We correlate the strength of interfacial interactions with the adhesive force necessary to separate a polymer from a surface. It is intuitive that interactions would influence adhesion and friction; however, challenges in the direct measurement of the interaction strength at interfaces have obscured the connection between these interactions and such phenomena. We overcome this by using interface-sensitive sum frequency generation spectroscopy to determine the strength of interfacial interactions between polymers and sapphire through a shift in vibrational frequency and compare this with mechanical adhesion tests. Our results indicate that spectroscopic shifts can be used to directly estimate adhesion, especially for polar materials. This work provides a framework to connect molecular interactions to interfacial properties, enabling the design and rapid screening of molecular architectures.

中文翻译：

分子相互作用与粘附机械功之间的联系

我们将界面相互作用的强度与将聚合物与表面分离所需的粘附力相关联。相互作用会影响粘附力和摩擦力是很直观的；然而，直接测量界面相互作用强度的挑战掩盖了这些相互作用与此类现象之间的联系。我们通过使用界面敏感的和频发生光谱来确定聚合物和蓝宝石之间界面相互作用的强度，通过振动频率的变化来克服这个问题，并将其与机械附着力测试进行比较。我们的结果表明，光谱位移可用于直接估计粘附力，尤其是对于极性材料。这项工作提供了一个将分子相互作用与界面特性联系起来的框架，

更新日期：2022-10-25

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