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Formation of dynamic duolayer systems at the air/water interface by using non-ionic hydrophilic polymers
journal contribution
posted on 2013-01-01, 00:00 authored by Emma PrimeEmma Prime, D N H Tran, A H M Leung, D Sunartio, G G Qiao, D H SolomonThe inclusion of a water-soluble polymer, poly(vinyl pyrrolidone) (PVP), into a surface active film composition before application to the water surface leads to the formation of a dynamic duolayer; a novel surface film system. This duolayer shows improved surface viscosity over the monolayer compound alone, while the addition of polymer maintains other film properties such as evaporation control and equilibrium spreading pressure. Brewster Angle Microscopy shows that the duolayer film undergoes a different formation mechanism upon film compression, and the resultant surface pressure/area isotherm is different at lower surface pressures indicating the PVP is present on the water surface at these pressures and squeezed out to the water subphase at higher pressures. The addition of water-soluble polymers to form a dynamic duolayer provides a unique way to produce defect-free and tightly packed films while polymer is associated with the film. This finding provides new knowledge for the design of surface films with improved properties with potential applications in many areas.
History
Journal
Australian journal of chemistryVolume
66Issue
7Pagination
807 - 813Publisher
CSIRO PublishingLocation
Clayton, Vic.Publisher DOI
ISSN
0004-9425eISSN
1445-0038Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2013, CSIROUsage metrics
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