Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5043
DC FieldValueLanguage
dc.contributor.authorValente, A. J. M.-
dc.contributor.authorJiménez, A.-
dc.contributor.authorSimões, A. C.-
dc.contributor.authorBurrows, H. D.-
dc.contributor.authorPolishchuk, A. Ya.-
dc.contributor.authorLobo, V. M. M.-
dc.date.accessioned2008-09-01T15:02:58Z-
dc.date.available2008-09-01T15:02:58Z-
dc.date.issued2007en_US
dc.identifier.citationEuropean Polymer Journal. 43:6 (2007) 2433-2442en_US
dc.identifier.urihttp://hdl.handle.net/10316/5043-
dc.description.abstractFilms of cellulose acetate containing different concentrations of meso-octamethyl-porphyrinogen (calix[4]pyrrole) were prepared and characterized using UV-vis and FTIR spectroscopy, DSC and SEM. Incorporation of calix[4]pyrrole into cellulose acetate leads to a decrease in the degree of hydrophilicity of the polymeric matrix. However, a slight increase in the percentage of water uptake of the polymer is found with an increase of the initial amount of calix[4]pyrrole in the composite composition. This effect can be related to the plasticizing effect that the calix[4]pyrrole provokes in the cellulose acetate. A comparative study of transport parameters of oxygen and some non-associated electrolytes (sodium, copper(II) and nickel chlorides) was carried out. The diffusion coefficients of molecular oxygen through cellulose acetate films decrease with an increase of the concentration of calix[4]pyrrole in the composite films. The transport (diffusion and permeation) of the above mentioned electrolytes through a set of composite films shows a decrease of permeability and diffusion coefficients with an increase of calix[4]pyrrole concentration. Such behaviour is typical of systems where interactions between the polymer and diffusing species occur. However, from the analysis of the distribution coefficient, it was found that those interactions are only dependent on the calix[4]pyrrole content for 2:1 electrolytes.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TWW-4NFR5CN-3/1/c8e93beea778c4b90e5b2ead92581bb6en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectCellulose acetateen_US
dc.subjectCalix[4]pyrroleen_US
dc.subjectTransport propertiesen_US
dc.subjectElectrolytesen_US
dc.titleTransport of solutes through calix[4]pyrrole-containing cellulose acetate filmsen_US
dc.typearticleen_US
dc.identifier.doi10.1016/j.eurpolymj.2007.03.047-
uc.controloAutoridadeSim-
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0002-4612-7686-
crisitem.author.orcid0000-0003-3127-2298-
crisitem.author.orcid0000-0002-5318-3280-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
fileacb3f80cb9864b8796118915a4b4ce3a.pdf675.73 kBAdobe PDFView/Open
Show simple item record

WEB OF SCIENCETM
Citations

15
checked on Nov 2, 2021

Page view(s)

206
checked on Nov 25, 2021

Download(s)

221
checked on Nov 25, 2021

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.