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http://hdl.handle.net/10773/20982
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Vilela, Carla | pt |
dc.contributor.author | Gadim, Tiago D. O. | pt |
dc.contributor.author | Silvestre, Armando J. D. | pt |
dc.contributor.author | Freire, Carmen S. R. | pt |
dc.contributor.author | Figueiredo, Filipe M. L. | pt |
dc.date.accessioned | 2017-12-07T20:06:20Z | - |
dc.date.issued | 2016 | pt |
dc.identifier.issn | 0969-0239 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/20982 | - |
dc.description.abstract | The present study discloses a new type of nanocomposite membranes consisting of cross-linked poly(methacryloyloxyethyl phosphate) (PMOEP) and bacterial cellulose (BC) prepared by the in situ free radical polymerization of MOEP within the BC network under green reaction conditions. Homogeneous and translucent PMOEP/BC nanocomposite membranes with 52, 61 and 78 wt% of BC have good thermal and viscoelastic stability up to 180 A degrees C with storage modulus higher than 200 MPa, good mechanical properties (Young's modulus = 7.8-13.5 GPa), and high ion exchange capacity (1.95-3.38 mmol [H+] g(-1)). The protonic conductivity of these nanocomposite membranes increases with increasing PMOEP content and relative humidity (RH), reaching values higher than 0.1 S cm(-1) at 98 % RH, with activation energy close to 15 kJ mol(-1), from room temperature up to 94 A degrees C. These values are comparable to, or higher than, data typically found for a commercial Nafion(A (R)) membrane, further confirming the potential of these proton separator materials as a green alternative for application in fuel cells. | pt |
dc.language.iso | eng | pt |
dc.publisher | SPRINGER | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/126268/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F84168%2F2012/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | BACTERIAL CELLULOSE MEMBRANES | pt |
dc.subject | FUEL-CELL APPLICATIONS | pt |
dc.subject | MICROBIAL CELLULOSE | pt |
dc.subject | CONDUCTIVITY | pt |
dc.subject | TEMPERATURE | pt |
dc.subject | COPOLYMERS | pt |
dc.subject | CHITOSAN | pt |
dc.subject | SORPTION | pt |
dc.subject | PEMFCS | pt |
dc.subject | ACID | pt |
dc.title | Nanocellulose/poly(methacryloyloxyethyl phosphate) composites as proton separator materials | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 3677 | pt |
degois.publication.issue | 6 | pt |
degois.publication.lastPage | 3689 | pt |
degois.publication.title | CELLULOSE | pt |
degois.publication.volume | 23 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1007/s10570-016-1050-7 | pt |
dc.identifier.doi | 10.1007/s10570-016-1050-7 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Nanocellulosepoly(methacryloyloxyethyl phosphate) composites as proton separator materials_10.1007s10570-016-1050-7.pdf | 1.41 MB | Adobe PDF |
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