Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/20982
Título: | Nanocellulose/poly(methacryloyloxyethyl phosphate) composites as proton separator materials |
Autor: | Vilela, Carla Gadim, Tiago D. O. Silvestre, Armando J. D. Freire, Carmen S. R. Figueiredo, Filipe M. L. |
Palavras-chave: | BACTERIAL CELLULOSE MEMBRANES FUEL-CELL APPLICATIONS MICROBIAL CELLULOSE CONDUCTIVITY TEMPERATURE COPOLYMERS CHITOSAN SORPTION PEMFCS ACID |
Data: | 2016 |
Editora: | SPRINGER |
Resumo: | 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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20982 |
DOI: | 10.1007/s10570-016-1050-7 |
ISSN: | 0969-0239 |
Versão do Editor: | 10.1007/s10570-016-1050-7 |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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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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