Next Article in Journal
Controlled Arrangement of Gold Nanoparticles on Planar Surfaces via Constrained Dewetting of Surface-Grafted RAFT Polymer
Next Article in Special Issue
CO2 Separation with Polymer/Aniline Composite Membranes
Previous Article in Journal
Life-Cycle Assessment in the Polymeric Sector: A Comprehensive Review of Application Experiences on the Italian Scale
Previous Article in Special Issue
Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol
Open AccessArticle

High Selective Composite Polyalkylmethylsiloxane Membranes for Pervaporative Removal of MTBE from Water: Effect of Polymer Side-chain

A.V. Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(6), 1213; https://doi.org/10.3390/polym12061213
Received: 8 May 2020 / Revised: 25 May 2020 / Accepted: 25 May 2020 / Published: 26 May 2020
(This article belongs to the Special Issue Polymeric Membrane Materials for Separation Liquid and Gas Mixtures)
For the first time, the effect of the side-chain in polyalkylmethylsiloxane towards pervaporative removal of methyl tert-butyl ether (MTBE) from water was studied. The noticeable enhancement of separation factor during the pervaporation of 1 wt.% MTBE solution in water through the dense film (40–50 µm) can be achieved by substitution of a methyl group (separation factor 111) for heptyl (161), octyl (169) or decyl (180) one in polyalkylmethylsiloxane. Composite membrane with the selective layer (~8 µm) made of polydecylmethylsiloxane (M10) on top of microfiltration support (MFFK membrane) demonstrated MTBE/water separation factor of 310, which was 72% greater than for the dense film (180). A high separation factor together with an overall flux of 0.82 kg·m−2·h−1 allowed this M10/MFFK composite membrane to outperform the commercial composite membranes. The analysis of the concentration polarization modulus and the boundary layer thickness revealed that the feed flow velocity should be gradually increased from 5 cm·s−1 for an initial solution (1 wt.% of MTBE in water) to 13 cm·s−1 for a depleted solution (0.2 wt.% of MTBE in water) to overcome the concentration polarization phenomena in case of composite membrane M10/MFFK (Texp = 50 °C). View Full-Text
Keywords: polyalkylmethylsiloxane; polymer side-chain; composite membranes; high selectivity; pervaporation; MTBE; water treatment polyalkylmethylsiloxane; polymer side-chain; composite membranes; high selectivity; pervaporation; MTBE; water treatment
Show Figures

Graphical abstract

MDPI and ACS Style

Borisov, I.; Podtynnikov, I.; Grushevenko, E.; Scharova, O.; Anokhina, T.; Makaev, S.; Volkov, A.; Volkov, V. High Selective Composite Polyalkylmethylsiloxane Membranes for Pervaporative Removal of MTBE from Water: Effect of Polymer Side-chain. Polymers 2020, 12, 1213.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop