Organic solvent and thermal resistant polytriazole membranes with enhanced mechanical properties cast from solutions in non-toxic solvents
Nunes, Suzana Pereira
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Imaging and Characterization Core Lab
King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division (BESE), Advanced Membrane and Porous Materials (AMPM), Thuwal, 23955-6900, Saudi Arabia
Nanostructured Polymeric Membrane Lab
Online Publication Date2019-11-05
Print Publication Date2020-03
Embargo End Date2021-11-05
Permanent link to this recordhttp://hdl.handle.net/10754/661534
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AbstractWe report the synthesis of organic solvent resistant polytriazole membranes using a sustainable process. In the first step, the polymer was dissolved in an ionic liquid for the membrane casting and immersion in water, followed by exposure to two non-toxic diepoxy crosslinkers with different lengths. We investigated the mechanical properties by measuring the creep recovery, and we correlated these data with the physical aging and compaction during filtration. Additionally, by using dynamic mechanical analysis, we studied the polymer relaxations at high temperatures associated with the local mobility of the crosslinker segments and the polytriazole chains, discussing their effect on the membrane performance. The performance in strong polar solvents, such as N, N′-dimethylformamide, was evaluated from 25 °C to 105 °C, with permeance values in the range of 3.7–10.6 L m−2 h−1 bar−1, and molecular weight cut-off around 1000 g mol−1. This confirms that the membranes meet the requirements for organic solvent applications.
CitationChisca, S., Marchesi, T., Falca, G., Musteata, V.-E., Huang, T., Abou-Hamad, E., & Nunes, S. P. (2020). Organic solvent and thermal resistant polytriazole membranes with enhanced mechanical properties cast from solutions in non-toxic solvents. Journal of Membrane Science, 597, 117634. doi:10.1016/j.memsci.2019.117634
SponsorsThe authors thank King Abdullah University of Science and Technology (KAUST) for the financial support, particularly for the grant URF/1/3441-01-01 and the base line BAS/1/1057-01-01.
JournalJournal of Membrane Science