4.7 Article

Novel Mixed Matrix Membranes Based on Polyphenylene Oxide Modified with Graphene Oxide for Enhanced Pervaporation Dehydration of Ethylene Glycol

期刊

POLYMERS
卷 14, 期 4, 页码 -

出版社

MDPI
DOI: 10.3390/polym14040691

关键词

polyphenylene oxide; mixed matrix membrane; graphene oxide; pervaporation; ethylene glycol dehydration

资金

  1. Russian Science Foundation [21-73-00043]
  2. Russian Science Foundation [21-73-00043] Funding Source: Russian Science Foundation

向作者/读者索取更多资源

In this study, graphene oxide (GO) nanoparticles were introduced into a poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) membrane to improve its pervaporation performance in the dehydration of ethylene glycol (EG). Through a series of experiments and tests, researchers successfully developed a PPO/GO composite membrane and found that the supported PPO/GO/MFFC membrane exhibited the best permeation properties in the dehydration of ethylene glycol.
Ethylene glycol (EG) is widely used in various economic and industrial fields. The demand for its efficient separation and recovery from water is constantly growing. To improve the pervaporation characteristics of a poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) membrane in dehydration of ethylene glycol, the modification with graphene oxide (GO) nanoparticles was used. The effects of the introduction of various GO quantities into the PPO matrix on the structure and physicochemical properties were studied by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies, scanning electron (SEM) and atomic force (AFM) microscopies, thermogravimetric analysis (TGA), swelling experiments, and contact angle measurements. Two types of membranes based on PPO and PPO/GO composite were developed: dense membranes and supported membranes on a fluoroplast substrate (MFFC). Transport properties of the developed membranes were evaluated in the pervaporation dehydration of EG in a wide concentration range (10-90 wt.% and 10-30 wt.% water for the dense and supported membranes, respectively). The supported PPO/GO(0.7%)/MFFC membrane demonstrated the best transport properties in pervaporation dehydration of EG (10-30 wt.% water) at 22 degrees C: permeation flux ca. 15 times higher compared to dense PPO membrane-180-230 g/(m(2)center dot h)), 99.8-99.6 wt.% water in the permeate. The membrane is suitable for the promising industrial application.

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