Please use this identifier to cite or link to this item:
|Title:||Nanocellulose/poly(methacryloyloxyethyl phosphate) composites as proton separator materials|
Gadim, Tiago D. O.
Silvestre, Armando J. D.
Freire, Carmen S. R.
Figueiredo, Filipe M. L.
|Keywords:||BACTERIAL CELLULOSE MEMBRANES|
|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.|
|Appears in Collections:||CICECO - Artigos|
Files in This Item:
|Nanocellulosepoly(methacryloyloxyethyl phosphate) composites as proton separator materials_10.1007s10570-016-1050-7.pdf||1.41 MB||Adobe PDF|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.