التفاصيل البيبلوغرافية
| العنوان: |
Increasing the performance of asymmetric pervaporation membranes for the separation of methanol/methyl‐tert‐butyl ether mixtures by the introduction of sulfonated polyimide into the poly(amide‐imide) matrix. |
| المؤلفون: |
Sapegin, Denis Andzheevich, Gubanova, Galina Nikolaevna, Popova, Elena Nikolaevna, Kononova, Svetlana Viktorovna |
| المصدر: |
Journal of Applied Polymer Science; 3/10/2021, Vol. 138 Issue 10, p1-11, 11p |
| مصطلحات موضوعية: |
POLYIMIDES, MEMBRANE separation, PERVAPORATION, ETHERS, SEPARATION (Technology), PHASE separation |
| مستخلص: |
A series of novel asymmetric membranes from polymer composites of poly(amide‐imide) with various content of sulfonated polyimide (1–6 wt%) was obtained through the nonsolvent‐induced phase separation process. Selective transport properties of the obtained materials were investigated in terms of pervaporation separation of methanol/methyl‐tert‐butyl ether mixtures at different temperatures. The introduction of the sulfonated polyimide to the poly(amide‐imide) matrix leads to a significant increase in membrane flux and an overall decrease in the process selectivity. Composite membranes having 1 wt% sulfonated polyimide in the matrix showed increased values of membrane flux (0.960 kg m−2 h−1 in comparison with 0.682 kg m−2 h−1 for unmodified membranes at 40°C, 10 wt% methanol), while having similar selectivity values (79.2 wt% methanol in permeate in comparison with 82 wt% for unmodified membranes at 40°C, 10 wt% methanol). Modified membrane showed the highest separation factor of 147 while separating methanol from its 3 wt% mixture with methyl‐tert butyl ether at 52°C with the overall flux of 1.01 kg m−2 h−1. A semiempirical mathematical model was developed and applied to test the efficiency of obtained membranes in the hybrid process of methanol/methyl‐tert‐butyl ether mixtures separation. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |