A new PDMS-b-PPO block copolymer membrane with novel non-perforated structure towards high flux for alcohol permselective pervaporation

Liu, W.; Guo, Hongxia; Ji, Sifan; Niu, Hai-Yan; Li, J. R.

doi:10.3144/expresspolymlett.2015.35

Cited by 9 publications

(4 citation statements)

References 36 publications

(22 reference statements)

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“…For acetone/water and acetic acid/water systems, the separation factors of our membranes are even higher than those of the reported membranes. Only in the case of isopropanol/water pervaporation, the performances of our polymeric membranes are not as good as those of the PDMS-based membranes fabricated in the literature studies [60,64]. From the above analyses, the biodegradable PGS and APS membranes are very promising materials for achieving beneficial pervaporation performance, especially in the separation of ethanol/water and acetic acid/water mixtures.…”

Section: Organic Solvent/water Systemsmentioning

confidence: 67%

“…Table 3 summarizes the data of polymeric membranes applied to organic solvent/water pervaporations in the literature [27,47,[57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73] for a comparison with the as-prepared polymeric membranes in this study. In most cases, our three membranes demonstrated excellent pervaporation efficiencies, especially superior to the literature results in the normalized flux and PSI value.…”

Section: Organic Solvent/water Systemsmentioning

confidence: 99%

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Biodegradable Polymeric Membranes for Organic Solvent/Water Pervaporation Applications

Chang

Wang

et al. 2021

Membranes

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Biodegradable polymers are a green alternative to apply as the base membrane materials in versatile processes. In this study, two dense membranes were made from biodegradable PGS (poly(glycerol sebacate)) and APS (poly(1,3-diamino-2-hydroxypropane-co-polyol sebacate)), respectively. The prepared membranes were characterized by FE-SEM, AFM, ATR-FTIR, TGA, DSC, water contact angle, and degree of swelling, in comparison with the PDMS (polydimethylpolysiloxane) membrane. In the pervaporation process for five organic solvent/water systems at 37 °C, both biodegradable membranes exhibited higher separation factors for ethanol/water and acetic acid/water separations, while the PDMS membrane attained better effectiveness in the other three systems. In particular, a positive relationship between the separation factor and the swelling ratio of organic solvent to water (DSo/DSw) was noticed. In spite of their biodegradability, the stability of both PGS and APS membranes was not deteriorated on ethanol/water pervaporation for one month. Furthermore, these two biodegradable membranes were applied in the pervaporation of simulated ABE (acetone-butanol-ethanol) fermentation solution, and the results were comparable with those reported in the literature.

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Section: Organic Solvent/water Systemsmentioning

confidence: 67%

Section: Organic Solvent/water Systemsmentioning

confidence: 99%

Biodegradable Polymeric Membranes for Organic Solvent/Water Pervaporation Applications

Chang

Wang

et al. 2021

Membranes

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“…Its permeation flux could reach a high of 3817 g·m −2 ·h −1 , along with a separation factor of 8.5 when concentrating a 5 wt. % ethanol aqueous solution [ 116 ]. Guo et al prepared membranes with a novel silicone block copolymer which was synthesized by the condensation of rubbery PDMS with glassy ladder like phenylsilsesquioxane (PSSQ).…”

Section: Membrane Materials For Ethanol Recoverymentioning

confidence: 99%

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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“…–OCH 3 groups from monomer 1 and monomer 2 have the ability to react with the –OH groups from PDMS to form covalent bonds, and thus, methacrylate and epoxy groups can be bridged with PDMS . The bridged methacrylate can realize free radical photopolymerization, and the epoxy group can realize the cationic photopolymerization under the role of the photoinitiator (4-octyloxyphenyl)phenyliodonium hexafluoroantimonate that can generate both free radicals and cations to initiate photopolymerization. − Furthermore, the transport structure of membranes is effectively controlled by the difference in the reactivity between the methacrylate and epoxy groups, which is different from the conventional control method, e.g., the change of the cross-linker amount . In that case, the formed molecular weight and viscosity of the prepolymer and the free volume of membranes will be adjusted, finally affecting the PV performance.…”

Section: Introductionmentioning

confidence: 99%

Photopolymerized Fabrication Method for PDMS Pervaporative Membranes

Li,

Yang,

Zhan

et al. 2023

Ind. Eng. Chem. Res.

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The polydimethylsiloxane (PDMS) membrane can be considered the benchmark of alcohol-selective membranes, and its preparation method by photopolymerization shows a great potential on the industrial scale. However, a single photopolymerization system by a free radical or cation is still a challenge to simultaneously have a high reaction speed and oxygen insensitivity. In this work, we proposed a free radical/cationic hybrid membrane-forming system toward PDMS. Both methacrylate groups and epoxy groups were introduced into the PDMS chain by the covalent bonding of 3-methacryloxypropylmethyldimethoxysilane and 3-glycidyloxypropyl(dimethoxy)methylsilane with PDMS. This hybrid system can be quickly cured by a free radical reaction which weakens the oxygen inhibition by a cationic reaction. Furthermore, the transport structure of membranes is effectively controlled by the difference in the reactivity between methacrylate and epoxy groups, where the formed molecular weight and viscosity of the prepolymer are changed from 62,860 to 108,198 g mol −1 and 1.53 to 2.26 Pa s, respectively, and the free volume of membranes is tuned from 5.567 to 6.253%. By optimization, the pervaporation performance of the membrane includes a 1-butanol separation factor of 37.9 and a total flux of 1179 g m −2 h −1 as evaluating 1.5 wt % 1-butanol/water solutions at 55 °C, which has a high superiority coupled with the fast reaction speed and oxygen insensitivity.

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A new PDMS-b-PPO block copolymer membrane with novel non-perforated structure towards high flux for alcohol permselective pervaporation

Cited by 9 publications

References 36 publications

Biodegradable Polymeric Membranes for Organic Solvent/Water Pervaporation Applications

Biodegradable Polymeric Membranes for Organic Solvent/Water Pervaporation Applications

Membranes for bioethanol production by pervaporation

Photopolymerized Fabrication Method for PDMS Pervaporative Membranes

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