English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/57815
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
DC FieldValueLanguage
dc.contributor.authorGuzman, Eduardo-
dc.contributor.authorSan Miguel, Veronica-
dc.contributor.authorPeinado, Carmen-
dc.contributor.authorOrtega, Francisco-
dc.contributor.authorRubio, Ramon G-
dc.identifier.citationLangmuir 26 (13) : 11494–11502 (2010)es_ES
dc.description.abstractMultilayers formed by the sodium salt of poly(4-styrenesulfonate), PSS, and triblock copolymers of the form PDMAEMA-PCL-PDMAEMA (PDMAEMA corresponding to poly[2-(N,N-dimethylamino)ethyl methacrylate), and PCL, to poly(epsilon-caprolactone) have been built by layer-by-layer self-assembly from the aqueous polyelectrolyte solutions. Two types of block copolymers have been used which differ on the type of the amino groups, either hydrochloride or quaternized. This leads to changes in the charge density of the chains for the same content of amino groups. The growth of the multilayers has been followed using dissipative quartz crystal microbalance and ellipsometry techniques. The results show that, independently of the conditions used in the assembling, the film thickness grows linearly with the number of layers. The comparison of the thickness values obtained from D-QCM and ellipsometry has allowed us to calculate the water content of the polymer film. The analysis of the D-QCM data also provides the shear modulus, whose values are typical of a rubber-like polymer system. The analysis of the mass adsorbed calculated by the ellipsometric measurements indicated that the nature of the charge compensation mechanism is extrinsic for all the studied systems, although the degree of extrinsic compensation is strongly dependent on the copolymer used and the concentration in solution. Finally, it was found that the adsorption kinetic of the layers is bimodal for all the films built. Even though the characteristic adsorption times depend on the specific copolymer used, no dependence on the number of layers has been found for a given multilayeres_ES
dc.description.sponsorshipThis work was supported in part by MICINN under grants FIS2009-14008-C02-01, by CAM under grant INTERFASESS05-MAT-227, and byESAunder grantMAPAO- 00-052. E.G. was supported by a FPU fellowship from MICINN. The authors are grateful to theUIRC of the CAI of Spectroscopy of Complutense University for the use of the ellipsometeres_ES
dc.publisherAmerican Chemical Societyes_ES
dc.titlePolyelectrolyte Multilayers Containing Triblock Copolymers of Different Charge Ratioes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
Appears in Collections:(ICTP) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show simple item record

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.