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BibTeX
Spin coating cellulose derivatives on quartz crystal microbalance plates to obtain hydrogel-based fast sensors and actuators
Journal of applied polymer science, 2007-12, Vol.106 (5), p.3040-3050
Sannino, A
Pappadà, S
Giotta, L
Valli, L
Maffezzoli, A
2007
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Sannino, A
Pappadà, S
Giotta, L
Valli, L
Maffezzoli, A
Titel
Spin coating cellulose derivatives on quartz crystal microbalance plates to obtain hydrogel-based fast sensors and actuators
Ist Teil von
Journal of applied polymer science, 2007-12, Vol.106 (5), p.3040-3050
Ort / Verlag
Hoboken: Wiley Subscription Services, Inc., A Wiley Company
Erscheinungsjahr
2007
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
Cellulose based superabsorbent hydrogels were spin coated and chemically crosslinked on Quartz Crystal Microbalance plates to obtain a thin superabsorbent layer. The hydrogel network was obtained by crosslinking hydroxiethylcellulose (HEC) and Carboxymethylcellulose (CMC) by the difunctional Divinylsulfone (DVS). The presence of the polyelectrolyte CMC was found to be responsible for the material high sorption sensitivity to changes in ionic strength and pH of the external solution, due to the Donnan type equilibrium established between the internal of the gel and the external solution. Since the hydrogel was synthesized in the form of a thin layer, there is negligible barrier to water diffusion through the material, which results in a fast swelling response to changes in the external solution properties. The device was immersed in a flux of water solution, where the ionic strength was continuously changed. The fast change in the equilibrium sorption capacity of the spin coated hydrogel were converted to an electrical signal by the apparatus. The time lag of the response was comparable to the inverse of the quartz oscillation frequency (approximately 10⁻⁷ s), and the accuracy in the weight change measurement was of the order of the nanogram. FTIR microscope analysis was used to determine the presence of hydrogel and its distribution on the QCM plate. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
Sprache
Englisch
Identifikatoren
ISSN: 0021-8995
eISSN: 1097-4628
DOI: 10.1002/app.25899
Titel-ID: cdi_proquest_miscellaneous_30130096
Format
–
Schlagworte
Applied sciences
,
Cellulose
,
Cellulose and derivatives
,
Coating
,
Crosslinking
,
Exact sciences and technology
,
hydrogel
,
Hydrogels
,
ionic strength
,
Microbalances
,
Natural polymers
,
Organic polymers
,
Physicochemistry of polymers
,
Plates
,
Properties and characterization
,
sensors
,
Solution and gel properties
,
Sorption
,
swelling
,
Thin films
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