A simple and green preparation of PVA-based cation exchange hybrid membranes for alkali recovery

Hao, Jianwen; Wu, Yonghui; Ran, Jing Yu; Wu, Bin; Xu, Tongwen

doi:10.1016/j.memsci.2013.01.014

Cited by 55 publications

(46 citation statements)

References 37 publications

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“…Compared with previous reports based on PVA matrix [6,7,8], the mass loss of composite membranes in this work was acceptable, which was only 9.2% when the dosage of boronic acid copolymer was 4%.…”

Section: Resultscontrasting

confidence: 75%

Composite Cationic Exchange Membranes Prepared from Polyvinyl Alcohol (PVA) and Boronic Acid Copolymers for Alkaline Diffusion Dialysis

et al. 2018

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Boronic acid copolymers with a large number of functional groups were obtained via a free radical polymerization method. The corresponding composite membranes for alkaline diffusion dialysis (DD) were prepared by a crosslinking reaction between polyvinyl alcohol (PVA) and the as-obtained boronic acid copolymers. The composite membranes possessed water uptake (WR) of 122.1–194.4%, ion exchange capacities (IECs) of 0.79–1.17 mmol/g, as well as both good mechanical stability (tensile strength of 40.7–49.9 MPa and elongation at break of 52.1–121.1%) and thermal stability. The as-prepared membranes were stable in 2 M NaOH solution at 65 °C with a swelling degree and mass loss of as-prepared membranes in the range of 305–368% and 9.2–22%, respectively. A NaOH/Na2WO4 mixture was used to investigate the separation properties of as-prepared membranes via the DD process. Results indicated that the dialysis coefficients of OH− (UOH) were in the range of 0.0079–0.0150 m/h, while the separation factors (S) were in the range of 26.6–53.2. The functional groups from boronic acid copolymer and –OH from PVA were demonstrated to promote the ion transport synergistically.

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Section: Resultscontrasting

confidence: 75%

Composite Cationic Exchange Membranes Prepared from Polyvinyl Alcohol (PVA) and Boronic Acid Copolymers for Alkaline Diffusion Dialysis

et al. 2018

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“…8 and listed in Table 5 accordingly. Although Td and IDT of all sIPN membranes are still somehow lower than those of our previously reported PVA hybrid membrane for diffusion dialysis [9,33], these membranes possess acceptable thermal stability for practical applications. The operation temperature is usually below 100 o C in diffusion dialysis process.…”

Section: Thermal Stabilitymentioning

confidence: 64%

Diffusion dialysis membranes with semi-interpenetrating network for acid recovery

Cheng

Yang

et al. 2015

Journal of Membrane Science

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“…Previous membranes from multisilicon copolymer poly(SSS-co-γ-MPS) and PVA have IEC of 0.72-1.05 mmol/g, though the dosage of poly(SSS-co-γ-MPS) is much higher (4.8 g poly(SSS-co-γ-MPS) (30-35 wt%) for 4 g PVA (5 wt%)) [18]. The higher IEC of the present membranes should be attributed to the use of PSSS with abundant -SO 3 Na groups [30]. The PVA-PSSS-A membrane has the lowest IEC, probably because of the formation of acid-base interaction between the -NH 2 and -SO 3 H groups after the membranes are transformed to H + form for IEC measurement.…”

Section: Iec and W Rmentioning

confidence: 67%

PVA–PSSS membranes for alkali recovery through diffusion dialysis: effect of alkoxysilanes

Liu

Xue

et al. 2015

Desalination and Water Treatment

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A B S T R A C TPoly(sodium-p-styrene-sulfonate) (PSSS) is synthesized by the method of ARGET ATRP, then mixed with polyvinyl alcohol (PVA), and cross-linked with different alkoxysilanes, that is, tetraethoxysilane (TEOS), 3-aminopropyltriethoxysilane (APTS), or γ-glycidoxypropyltrimethoxysilane (GPTS). The obtained flexible cation-exchange membranes have water uptakes (W R ) of 46.8-120.7% and ion-exchange capacities (IEC) of 1.03-1.64 mmol/g. The category of the alkoxysilanes strongly influences the membrane properties. The membrane from GPTS has the highest thermal stability with T d (temperature at 5% weight loss) of 267.4˚C, the highest IEC, and the lowest swelling degree in 65˚C water, which is due to the dual cross-linking of Si-O-Si and C-O-C between GPTS and PVA. When applied for diffusion dialysis (DD) process of NaOH/Na 2 WO 4 mixture, the membranes exhibit excellent alkali flux. The OH − dialysis coefficients (U OH ) are in the range of 0.0072-0.0208 m/h, higher than PVA blank membrane (0.0077 m/h) or commercial poly(2,6-dimethyl-1,4-phenylene oxide)-based membrane (0.004 m/h) (Tianwei Membrane Co., Ltd., Shandong of China). The separation factors (S) are in the range of 16.8-25.7, higher than PVA-PSSS membrane cross-linked with formaldehyde (S = 8.0). Hence, the membranes can be potentially applied in DD process for alkali recovery.

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A simple and green preparation of PVA-based cation exchange hybrid membranes for alkali recovery

Cited by 55 publications

References 37 publications

Composite Cationic Exchange Membranes Prepared from Polyvinyl Alcohol (PVA) and Boronic Acid Copolymers for Alkaline Diffusion Dialysis

Composite Cationic Exchange Membranes Prepared from Polyvinyl Alcohol (PVA) and Boronic Acid Copolymers for Alkaline Diffusion Dialysis

Diffusion dialysis membranes with semi-interpenetrating network for acid recovery

PVA–PSSS membranes for alkali recovery through diffusion dialysis: effect of alkoxysilanes

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