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- W2914128274 abstract "In this work, polydimethylsiloxane (PDMS) polymeric membranes were fabricated by incorporating fumed silica nanoparticles which were functionalized with two silane coupling agents—NH 2 (CH 2 ) 3 Si(OC 2 H 5 ) 3 (APTS) and NH 2 (CH 2 ) 2 NH(CH 2 ) 3 Si(OC 2 H 5 ) 3 (TSED)—for selective removal of ethanol from aqueous solutions via pervaporation. It was demonstrated that large agglomerates were not observed indicating the uniform distribution of modified silica throughout the PDMS matrices. It is noted that the ethanol diffusivity and the water contact angles were both increased remarkably, being beneficial to the preferential permeation of ethanol through the membranes. The pervaporation results showed that the addition of the two types of modified silica nanoparticles dramatically enhanced both the permeability and selectivity of hybrid membranes. Compared to APTS, silica modified by TSED at the concentration of 4 wt. % resulted in the optimum pervaporation membranes with the maximum separation factor of 12.09 and the corresponding permeation flux of approximately 234.0 g·m −2 ·h −1 in a binary aqueous mixture at 40°C containing 10 wt. % ethanol. The observation will benefit the choice of coupling agents to improve the compatibility between hydrophilic fillers and hydrophobic polymers in preparing mixed matrix membranes." @default.
- W2914128274 created "2019-02-21" @default.
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- W2914128274 date "2019-02-03" @default.
- W2914128274 modified "2023-10-12" @default.
- W2914128274 title "Modified Silica Incorporating into PDMS Polymeric Membranes for Bioethanol Selection" @default.
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- W2914128274 doi "https://doi.org/10.1155/2019/5610282" @default.
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