Journal
MEMBRANES
Volume 12, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/membranes12090832
Keywords
membrane; poly(2; 6-dimethyl-1; 4-phenylene oxide); polydimethylsiloxane; block copolymer; graphene oxide; pervaporation; ethanol dehydration
Categories
Funding
- Russian Science Foundation [21-73-00043]
Ask authors/readers for more resources
Novel high-performance asymmetric membranes based on a block copolymer synthesized from polydimethylsiloxane and poly(2,6-dimethyl-1,4-phenylene oxide) were developed for enhanced pervaporation dehydration of ethanol. The membranes achieved improved dehydration performance through non-perforated porous structure and graphene oxide modifications.
Purification and concentration of bioalcohols is gaining new status due to their use as a promising alternative liquid biofuel. In this work, novel high-performance asymmetric membranes based on a block copolymer (BCP) synthesized from polydimethylsiloxane (PDMS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) were developed for enhanced pervaporation dehydration of ethanol. Improvement in dehydration performance was achieved by obtaining BCP membranes with a non-perforated porous structure and through surface and bulk modifications with graphene oxide (GO). Formation of the BCP was confirmed by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies. The changes to morphology and physicochemical properties of the developed BCP and BCP/GO membranes were studied by scanning electron (SEM) and atomic force (AFM) microscopies, thermogravimetric analysis (TGA) and contact angle measurements. Transport properties of the developed membranes were evaluated by the pervaporation dehydration of ethanol over a wide concentration range (4.4-70 wt.% water) at 22 degrees C. The BCP (PDMS:PPO:2,4-diisocyanatotoluene = 41:58:1 wt.% composition) membrane modified with 0.7 wt.% GO demonstrated optimal transport characteristics: 80-90 g/(m(2)h) permeation flux with high selectivity (76.8-98.8 wt.% water in the permeate, separation factor of 72-34) and pervaporation separation index (PSI) of 5.5-2.9.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available