Pervaporation of Methanol–Ethylene Glycol Mixture over Organic–Inorganic Hybrid Membranes

Zhang, Qiu Gen; Han, Guodong; Hu, Wen Wei; Zhu, Ai Mei; Liu, Qing Lin

doi:10.1021/ie400290z

Cited by 16 publications

(12 citation statements)

References 28 publications

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“…Although the performances of membranes produced by RTIPS are better than membranes produced via NIPS and TIPS, but the hydrophobicity of polymer materials leads to easy adsorption of organic compounds in the usage of membranes and need to exchange frequently. Due to naturally hydrophilicity, good permeability, rejection characteristics, and fouling resistant of CA, CA is extensively used in the preparation of MF membranes.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of PES/CA microporous membranes via reverse thermally induced phase separation process

Liu

Wei

et al. 2017

Polymer Engineering & Sci

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The blend polyethersulfone (PES)/cellulose acetate (CA) flat‐sheet microporous membranes were prepared by reverse thermally induced phase separation (RTIPS) process. The effects of CA content and coagulation bath temperature on membrane structures and properties were investigated in terms of membrane morphology, water contact angle, permeation performance, and mechanical properties. The cloud point results indicated that the cloud point decreased with the increasing content of CA. When the coagulation bath temperature was lower than the cloud point, the membrane formation process underwent nonsolvent induced phase separation (NIPS) process and dense skin layer and finger‐like structure were formed in membranes. These membranes had lower pure water flux and poor mechanical properties. But when the coagulation bath temperature was higher than the cloud point, the membrane formation process underwent RTIPS process. The porous top surface as well as porous cross‐section of the membranes were formed. Therefore, high pure water flux and good mechanical properties were obtained. The contact angles results indicated that the hydrophilicity of the prepared membranes improved obviously with the addition of CA. When the content of CA was 0.5 wt% and the membrane formation temperature was 323K, the PES/CA microporous membrane which was prepared via the RTIPS process displayed a optimal permeability of the pure water flux of 816 L m−2 h−1 and the BSA rejection rate of 49.5%, which showed an increase of 48.9% and 23.6% than that of pure PES membrane, respectively. Moreover, the mechanical strengths of the membranes obtained by RTIPS process were better than those membranes prepared by NIPS process. POLYM. ENG. SCI., 58:180–191, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of PES/CA microporous membranes via reverse thermally induced phase separation process

Liu

Wei

et al. 2017

Polymer Engineering & Sci

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“…The copolymer membranes for this purpose have been based on acrylonitrile and hydroxymethyl methacrylate, methacrylic acid or vinylpyrrolidone . Other kinds of membranes composed of chitosan and polyvinylpyrrolidone blend have been prepared using additive stage of chemical modification of chitosan by tetraethoxysilane or 1,2‐bis(triethoxysilyl)ethane …”

Section: Introductionmentioning

confidence: 99%

“…21 Other kinds of membranes composed of chitosan and polyvinylpyrrolidone blend have been prepared using additive stage of chemical modification of chitosan by tetraethoxysilane 22 or 1,2-bis(triethoxysilyl)ethane. 23 Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) is an available membrane material that has been used for pervaporation of methanol-ethylene glycol mixtures in pure form 20 and in modified form. 24 In our previous work, 24 a special approach to physical modification of PPO was implemented by including hybrid star-shaped macromolecules as filler (up to 5 wt%) into the PPO matrix.…”

Section: Introductionmentioning

confidence: 99%

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane

et al. 2016

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Star-shaped macromolecules with six arms of polystyrene grafted onto a fullerene C 60 core, or fullerene-containing polystyrene (FPS), were used for the modification of poly(phenylene oxide) (PPO) and the preparation of a dense thin-film membrane. The membrane structure was studied using scanning electron microscopy. The effect of FPS modifier on membrane density and mass transfer of methanol and ethylene glycol through the membrane was studied. Sorption and pervaporation tests were used to determine degree of sorption, diffusion coefficients, flux through the membrane and separation factor. In the pervaporation of a methanol-ethylene glycol mixture over the concentration range of 10-30 wt% methanol in the feed, all membranes showed high affinity to methanol. The separation factor reached a maximum at 5 wt% FPS in the membrane. The PPO/FPS membranes exhibit the best separation properties when the feed is enriched with ethylene glycol.

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“…The optimal values of PVP content and UV irradiation time were about 9 wt.% and 4 min, respectively, which provided the highest membrane permselectivity. Several studies by Zhang et al [ 84 , 85 ] were devoted to the development of MMMs based on chitosan/PVP blends modified by silica. The hybrid membranes were obtained via a sol–gel process using 2-bis(triethoxysilyl)-ethane (BTEE) as a crosslinker that formed a semi-interpenetrating network in the membrane matrix at the molecular scale [ 84 ].…”

Section: Membranes For Methanol/eg Separationmentioning

confidence: 99%

A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification

2022

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Ethylene glycol (EG) is an essential reagent in the chemical industry including polyester and antifreeze manufacture. In view of the constantly expanding field of EG applications, the search for and implementation of novel economical and environmentally friendly technologies for the separation of organic and aqueous–organic solutions remain an issue. Pervaporation is currently known to significantly reduce the energy and resource consumption of a manufacturer when obtaining high-purity components using automatic, easily scalable, and compact equipment. This review provides an overview of the current research and advances in the pervaporation of EG-containing mixtures (water/EG and methanol/EG), as well as a detailed analysis of the relationship of pervaporation performance with the membrane structure and properties of membrane materials. It is discussed that a controlled change in the structure and transport properties of a membrane is possible using modification methods such as treatment with organic solvents, introduction of nonvolatile additives, polymer blending, crosslinking, and heat treatment. The use of various modifiers is also described, and a particularly positive effect of membrane modification on the separation selectivity is highlighted. Among various polymers, hydrophilic PVA-based membranes stand out for optimal transport properties that they offer for EG dehydrating. Fabricating of TFC membranes with a microporous support layer appears to be a viable approach to the development of productivity without selectivity loss. Special attention is given to the recovery of methanol from EG, including extensive studies of the separation performance of polymer membranes. Membranes based on a CS/PVP blend with inorganic modifiers are specifically promising for methanol removal. With regard to polymer wettability properties, it is worth mentioning that membranes based on hydrophobic polymers (e.g., SPEEK, PBI/PEI, PEC, PPO) are capable of exhibiting much higher selectivity due to diffusion limitations.

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Pervaporation of Methanol–Ethylene Glycol Mixture over Organic–Inorganic Hybrid Membranes

Cited by 16 publications

References 28 publications

Preparation and characterization of PES/CA microporous membranes via reverse thermally induced phase separation process

Preparation and characterization of PES/CA microporous membranes via reverse thermally induced phase separation process

Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane

A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification

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Pervaporation of Methanol–Ethylene Glycol Mixture over Organic–Inorganic Hybrid Membranes

Cited by 16 publications

References 28 publications

Preparation and characterization of PES/CA microporous membranes via reverse thermally induced phase separation process

Preparation and characterization of PES/CA microporous membranes via reverse thermally induced phase separation process

Effect of polystyrene stars with fullerene C60cores on pervaporation properties of poly(phenylene oxide) membrane

A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification

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Effect of polystyrene stars with fullerene C₆₀cores on pervaporation properties of poly(phenylene oxide) membrane