Connection between Molecular Interactions and Mechanical Work of Adhesion

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...

Full description

Saved in:
Bibliographic Details
Published in:ACS macro letters 2022-11, Vol.11 (11), p.1285-1290
Main Authors: Gaire, Babu, Wilson, Michael C., Singla, Saranshu, Dhinojwala, Ali
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2161-1653
2161-1653
DOI:10.1021/acsmacrolett.2c00499