Strongly Selective Polymer Membranes Modified with Heteroarm Stars for the Ethylene Glycol Dehydration by Pervaporation

Autor: Ludmila Vinogradova, Valeriia Rostovtseva, Galina Polotskaya, Alexandra Pulyalina, Daria Rudakova
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Membranes
Volume 10
Issue 5
Membranes, Vol 10, Iss 86, p 86 (2020)
ISSN: 2077-0375
DOI: 10.3390/membranes10050086
Popis: Hybrid membranes based on poly (2,6-dimethyl-1,4-phenylene oxide) modified with heteroarm stars (HAS) were developed to separate ethylene glycol/water mixtures by pervaporation. The HAS consist of a small branching center fullerene C 60 and twelve arms of different nature, six arms of nonpolar polystyrene and six arms of polar poly-tert-butyl methacrylate. The changes of structure and physical properties with HAS inclusion were systematically studied using SEM, X-ray diffraction analysis, TGA, and contact angle measurements. Mass transfer of ethylene glycol and water through membranes was studied by sorption and pervaporation tests. It was found that the growth of HAS content up to 5 wt% in the membrane leads to an increase in the total flux and a strong increase in the separation factor. To evaluate intrinsic properties of the penetrant–membrane system, permeability and selectivity were calculated. Overall, utilizing star-shaped macromolecules as a filler can be a promising way to improve the separation performance of diffusion membranes.
Databáze: OpenAIRE
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