The Open UniversitySkip to content

The adhesive properties of viscoelastic liquid films

Bowen, James; Cheneler, David and Andrews, James W (2015). The adhesive properties of viscoelastic liquid films. In: UK Materials Characterisation Seminar 2015, 15 Oct 2015, Teddington, UK.

Full text available as:
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (561kB) | Preview
Google Scholar: Look up in Google Scholar


The adhesive characteristics of thin films (0.2 - 2 µm) of linear PDMS liquids with a wide range of molecular weights have been measured using an AFM with a colloid probe (diameters 5 and 12 µm) for different separation velocities. The data were consistent with a residual film in the contact region having a thickness of ~ 6 nm following an extended dwell time before separation of the probe. It was possible to estimate the maximum adhesive force as a function of the Capillary number, Ca, by applying existing theoretical models based on capillary interactions and viscous flow except at large values of Ca in the case of viscoelastic fluids, for which it was necessary to develop a nonlinear viscoelastic model. The compliance of the AFM colloid beam was an important factor in governing the retraction velocity of the probe and therefore the value of the adhesive force but the inertia of the beam and viscoelastic stress overshoot effects were not significant in the range of separation velocities investigated.

Item Type: Conference or Workshop Item
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Related URLs:
Item ID: 44818
Depositing User: James Bowen
Date Deposited: 26 Nov 2015 16:15
Last Modified: 12 Jun 2020 02:59
Share this page:

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU