Hydroxide Conduction Enhancement of Chitosan Membranes by Functionalized MXene
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
2.2. Apparatus
2.3. Methods
3. Results and Discussion
3.1. Experimental Results
3.2. Characterizations of Functionalized MXene
3.3. Microstructure, Physical, and Chemical Properties of Membrane
3.4. Ion Exchange Capacity (IEC), Water Uptake Ratio, and Swelling Ratio
3.5. Hydroxide Conductivity of Membrane
4. Conclusions
- (1)
- QMXene-NH2 and CS had high interfacial compatibility and the former could be homogeneously dispersed in CS matrix.
- (2)
- By constructing continuous OH− conduction channels inside the membrane, QMXene-NH2 increased the number of carrier sites allowing ion jumping and conduction.
- (3)
- Adding QMXene-NH2 significantly augmented the OH− conductivity of the hybrid membrane. At 20 °C, such conductivity of the hybrid membrane (3.98 mS cm−1) was 2.72-fold that of the control CS membrane.
- (4)
- Adding QMXene-NH2 boosted both the thermal and mechanical stabilities and reduced the membrane swelling ratio.
- (5)
- The addition of QMXene-NH2 significantly increased the ion exchange capacity of the hybrid membrane and the water uptake ratio and swelling ratio of the hybrid membrane both dropped. For example, when 7.5% QMXene-NH2 was filled, the two values reduced to 85.4% and 18.4% respectively.
Author Contributions
Funding
Conflicts of Interest
References
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Wang, L.; Shi, B. Hydroxide Conduction Enhancement of Chitosan Membranes by Functionalized MXene. Materials 2018, 11, 2335. https://doi.org/10.3390/ma11112335
Wang L, Shi B. Hydroxide Conduction Enhancement of Chitosan Membranes by Functionalized MXene. Materials. 2018; 11(11):2335. https://doi.org/10.3390/ma11112335
Chicago/Turabian StyleWang, Lina, and Benbing Shi. 2018. "Hydroxide Conduction Enhancement of Chitosan Membranes by Functionalized MXene" Materials 11, no. 11: 2335. https://doi.org/10.3390/ma11112335