Enhanced pervaporation performance of PDMS membranes based on nano-sized Octa[(trimethoxysilyl)ethyl]-POSS as macro-crosslinker

Zhan, Xia; Lü, Juan; Xu, Hengli; Liu, Jihui; Liu, Xiaoshuang; Cao, Xingzhong; Li, Jiding

doi:10.1016/j.apsusc.2018.12.093

Cited by 43 publications

(21 citation statements)

References 51 publications

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“…Although it is known that PDMS is benchmark material in the preparation of ethanol perm-selective membranes, pure PDMS membranes show low fluxes and little ethanol selectivity. However, by modifying the composition of the PDMS membrane (mixed-matrix membranes (MMMs) or hybrid membranes) it is possible to improve the ethanol separation efficiency, increasing both permeability and selectivity [ 59 , 62 , 63 , 64 ].…”

Section: Resultsmentioning

confidence: 99%

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

et al. 2020

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High energy demand, competitive fuel prices and the need for environmentally friendly processes have led to the constant development of the alcohol industry. Pervaporation is seen as a separation process, with low energy consumption, which has a high potential for application in the fermentation and dehydration of ethanol. This work presents the experimental ethanol recovery by pervaporation and the semi-empirical model of partial fluxes. Total permeate fluxes between 15.6–68.6 mol m−2 h−1 (289–1565 g m−2 h−1), separation factor between 3.4–6.4 and ethanol molar fraction between 16–171 mM (4–35 wt%) were obtained using ethanol feed concentrations between 4–37 mM (1–9 wt%), temperature between 34–50 ∘C and commercial polydimethylsiloxane (PDMS) membrane. From the experimental data a semi-empirical model describing the behavior of partial-permeate fluxes was developed considering the effect of both the temperature and the composition of the feed, and the behavior of the apparent activation energy. Therefore, the model obtained shows a modified Arrhenius-type behavior that calculates with high precision the partial-permeate fluxes. Furthermore, the versatility of the model was demonstrated in process such as ethanol recovery and both ethanol and butanol dehydration.

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Section: Resultsmentioning

confidence: 99%

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

et al. 2020

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“…Its source including components and composition is important in determining the performance of MMMs [ 244 ]. Most PDMS used for ethanol-selective MMMs are two-component vinyl-terminated General Electric RTV 615 [ 76 , 77 , 82 , 245 ] and hydroxyl-terminated PDMS produced in China [ 21 , 72 , 126 , 246 ]. Generally, it seems that vinyl end-capped PDMS MMMs are capable of delivering higher ethanol selectivity.…”

Section: Membrane Materials For Ethanol Recoverymentioning

confidence: 99%

“…%) 10 50 17.7 536 [ 269 ] PDMS/PVDF Octa[(trimethoxysilyl)ethyl]-POSS (7.5 wt. %) 10 40 16.4 253 [ 246 ] PDMS PSS-2 (20 wt. %) 6 40 13 710 [ 270 ] PDMS/PA PZSNT (10 wt.…”

Section: Membrane Materials For Ethanol Recoveryunclassified

“…The most commonly used fillers are zeolites including silicalite-1 [ 19 , 73 , 75 , 245 ] and ZSM-5 [ 82 , 92 , 248 , 249 ]. Other fillers reported are MOFs [ 97 , 250 ] and its subclass ZIFs [ 87 , 251 , 252 ], fumed silica [ 55 , 88 , 93 ], carbon nanotubes [ 98 , 175 ], carbon blacks [ 99 , 100 ], POSSs [ 103 , 246 ], etc. Taking into account the filler particles, filler type, particle size, and particle dispersion status in MMMs are crucial for the PV separation properties.…”

Section: Membrane Materials For Ethanol Recoverymentioning

confidence: 99%

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Membranes for bioethanol production by pervaporation

Peng

Lan

Liang

et al. 2021

Biotechnol Biofuels

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Background Bioethanol as a renewable energy resource plays an important role in alleviating energy crisis and environmental protection. Pervaporation has achieved increasing attention because of its potential to be a useful way to separate ethanol from the biomass fermentation process. Results This overview of ethanol separation via pervaporation primarily concentrates on transport mechanisms, fabrication methods, and membrane materials. The research and development of polymeric, inorganic, and mixed matrix membranes are reviewed from the perspective of membrane materials as well as modification methods. The recovery performance of the existing pervaporation membranes for ethanol solutions is compared, and the approaches to further improve the pervaporation performance are also discussed. Conclusions Overall, exploring the possibility and limitation of the separation performance of PV membranes for ethanol extraction is a long-standing topic. Collectively, the quest is to break the trade-off between membrane permeability and selectivity. Based on the facilitated transport mechanism, further exploration of ethanol-selective membranes may focus on constructing a well-designed microstructure, providing active sites for facilitating the fast transport of ethanol molecules, hence achieving both high selectivity and permeability simultaneously. Finally, it is expected that more and more successful research could be realized into commercial products and this separation process will be deployed in industrial practices in the near future. Graphical abstract

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“…It should be emphasized that the reports on the modification of polysiloxanes with silsesquioxanes are limited. These papers concern mostly octa-functionalized T 8 silsesquioxanes that are used in the modification of polysiloxanes in cross-linking processes resulting in the formation of aerogels, membranes, ceramic precursors or silicone rubbers [88][89][90][91][92][93]. There are also few examples of exploitation of other types of silsesquioxanes.…”

Section: Introductionmentioning

confidence: 99%

Polysiloxanes Grafted with Mono(alkenyl)Silsesquioxanes—Particular Concept for Their Connection

et al. 2020

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Herein, a facile and efficient synthetic route to unique hybrid materials containing polysiloxanes and mono(alkyl)silsesquioxanes as their pendant modifiers (T8@PS) was demonstrated. The idea of this work was to apply the hydrosilylation reaction as a tool for the efficient and selective attachment of mono(alkenyl)substituted silsesquioxanes (differing in the alkenyl chain length, from -vinyl to -dec-9-enyl and types of inert groups iBu, Ph at the inorganic core) onto two polysiloxanes containing various amount of Si-H units. The synthetic protocol, determined and confirmed by FT-IR in situ and NMR analyses, was optimized to ensure complete Si-H consumption along with the avoidance of side-products. A series of 20 new compounds with high yields and complete β-addition selectivity was obtained and characterized by spectroscopic methods.

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Enhanced pervaporation performance of PDMS membranes based on nano-sized Octa[(trimethoxysilyl)ethyl]-POSS as macro-crosslinker

Cited by 43 publications

References 51 publications

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

Membranes for bioethanol production by pervaporation

Polysiloxanes Grafted with Mono(alkenyl)Silsesquioxanes—Particular Concept for Their Connection

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