Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/36735
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dc.contributor.authorGamelas, J. A. F.-
dc.contributor.authorSalvador, A.-
dc.contributor.authorHidalgo, J.-
dc.contributor.authorFerreira, P. J.-
dc.contributor.authorTejado, A.-
dc.date.accessioned2017-02-15T22:44:33Z-
dc.date.available2018-02-16T01:00:09Z-
dc.date.issued2016-12-29-
dc.identifier.urihttp://hdl.handle.net/10316/36735-
dc.description.abstractCellulose fibers were first functionalized on their surface by silanization with trichloromethylsilane in an optimized gas-solid reaction, and the occurrence of the reaction was assessed using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. Then, the changes in the physicochemical surface properties of the material were thoroughly assessed using inverse gas chromatography (IGC) and X-ray photoelectron spectroscopy as surface specific tools. A very surprising combination of results was obtained: (i) the dispersive component of the surface energy was found to decrease from 42 to 14 mJ m(-2) (at 40 °C), the latter figure representing one of the lowest values ever reported (by IGC) for cellulose-based materials, and (ii) both Lewis acidic and Lewis basic characters of the fiber surface, as measured by the injection into the IGC columns of 15 different vapor probes, significantly increased with silanization. Moreover, those remarkable changes in the surface properties of the material were obtained at a low degree of silanization (as shown by ATR-FTIR). The present results may have a great impact in what concerns the application of the described type of superhydrophobic cellulose fibers for the production of new biocomposites: an unusual enhanced compatibility both with low-surface energy polymeric matrices, such as polyolefins, as well as with other types of matrices through Lewis acid-base interactions, can be predicted.por
dc.language.isoengpor
dc.publisherAmerican Chemical Societypor
dc.rightsembargoedAccess-
dc.titleUnique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fiberspor
dc.typearticle-
degois.publication.firstPage927por
degois.publication.lastPage935por
degois.publication.issue4por
degois.publication.titleLangmuirpor
dc.relation.publisherversionhttp://pubs.acs.org/doi/abs/10.1021/acs.langmuir.6b03970por
dc.peerreviewedyespor
dc.identifier.doi10.1021/acs.langmuir.6b03970por
dc.identifier.doi10.1021/acs.langmuir.6b03970-
degois.publication.volume33por
item.fulltextCom Texto completo-
item.languageiso639-1en-
item.grantfulltextopen-
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.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.orcid0000-0002-1474-767X-
crisitem.author.orcid0000-0002-4503-6811-
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais
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