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© 2018. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

[...]the versatility of cellulose is even fostered when its nanoscale forms are considered, namely cellulose nanofibrils (CNFs), cellulose nanocrystals (CNCs) and bacterial cellulose (BC), whose interest for the design of innovative and all-purpose nanomaterials has skyrocketed during the last couple of years, including in the nanocomposites domain [4,5,6,7,8,9]. [...]the capacitance of the sample in the in-plane direction is much lower due to the small cross-sectional area determined essentially by the thickness of the membrane (Cin-plane = ε0εrwδL0−1, where ε0 and εr are the vacuum and relative permittivities, respectively, of the membrane material, and w, δ and L0 are the width, thickness and length of the membrane). [...]the protonic conductivity of membrane P(bisMEP)/BC_1 increased 4 orders of magnitude from 35.8 × 10−4 mS cm−1 to 22.4 mS cm−1 after raising the RH from 20% to almost saturated conditions (98%) at a temperature of 94 °C (Figure 8a). The protonic conductivities of the P(bisMEP)-based nanocomposite membranes are lower than those obtained for the cross-linked PMOEP/BC membranes prepared in our previous study (σ > 100 mS cm−1 at 98% RH and 20–94 °C, membrane with 48 wt % polyelectrolyte, IEC = 3.38 mmol g−1) [21]. Since the IEC and the WU values of both membranes are similar, the higher conductivity of the cross-linked version must result from significant differences in the structure and/or distribution of the polyelectrolyte and the hydrated domains within the structure forming the ion transport paths.

Details

Title
Poly(bis[2-(methacryloyloxy)ethyl] phosphate)/Bacterial Cellulose Nanocomposites: Preparation, Characterization and Application as Polymer Electrolyte Membranes
Author
Vilela, Carla; Martins, Ana P C; Sousa, Nuno; Silvestre, Armando J D; Figueiredo, Filipe M L; Freire, Carmen S R
Publication year
2018
Publication date
Jul 2018
Publisher
MDPI AG
e-ISSN
20763417
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2321864312
Copyright
© 2018. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.