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Surface-wetting characterization using contact-angle measurements.

Tommi Huhtamäki1, Xuelin Tian1,2, Juuso T Korhonen1,3

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|July 11, 2018
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Summary
This summary is machine-generated.

This study details a reliable protocol for measuring surface wetting using sessile-drop goniometry. It provides a method for accurate advancing contact angle (ACA) and receding contact angle (RCA) measurements for various materials.

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Area of Science:

  • Surface Science
  • Materials Science
  • Physical Chemistry

Background:

  • Wetting describes water-surface interactions, crucial for biological and technological applications.
  • The contact angle quantifies surface wettability, with low angles indicating spreading and high angles indicating repulsion.
  • Sessile-drop goniometry is a common technique for measuring contact angles due to its simplicity.

Purpose of the Study:

  • To provide a detailed protocol for reliable and reproducible contact angle measurements.
  • To address the challenges of minimizing errors in sessile-drop goniometry.
  • To enable accurate determination of advancing contact angle (ACA) and receding contact angle (RCA).

Main Methods:

  • Utilizing sessile-drop goniometry with a focus on probe drop volume manipulation.
  • Implementing a protocol for measuring both advancing contact angle (ACA) and receding contact angle (RCA).
  • Describing modifications for using various probe liquids beyond water.

Main Results:

  • A standardized protocol for performing reliable ACA and RCA measurements.
  • Demonstration of how to minimize systematic and random errors in contact angle determination.
  • Established timeframes for single and repeat measurements (15-20 min per pair, 1-2 h for protocol).

Conclusions:

  • The presented protocol enhances the accuracy and reproducibility of surface wetting characterization.
  • Sessile-drop goniometry, when performed with care, is a powerful tool for diverse material analysis.
  • The protocol is adaptable for different probe liquids, broadening its applicability.