Switchable adhesion between oppositely charged polyelectrolytes: dependence of applied load


Tuning the interactions between different surfaces has technological benefits in areas such as adhesion, compatibilisation and nano-actuators. We shall study the interaction between a grafted polybase (brush) on an inorganic substrate and a polyacid hydrogel in the different pH solutions. We have shown that the brush and the gel do not adhere at pH 3. This adhesion is strongly dependent on the load applied to the gel before adhesion. We are interested in measuring the pressure dependence of the adhesion in order to understand the mechanism of the adhesion. In particular, we are interesting in seeing whether there is a regime whereby interdigitation of the brush into the gel contributes to the adhesion, a phenomenon that can only be determined by neutron reflectometry. Previous measurements were with minimal applied load, and showed no such effect.

DOI https://doi.org/10.5286/ISIS.E.24003356
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24003356
Creator Ms Rita La Spina; Dr Mike Michael Tomlinson; Professor Mark Geoghegan
Publisher ISIS Neutron and Muon Source
Publication Year 2010
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2007-11-24T09:31:54Z
Temporal Coverage End 2007-11-26T22:51:57Z