Preparation and characterization of CMCS/PVA blend membranes and its sorption and pervaporation performance (I)

Shen, Jinwen; Ruan, Hao; Gao, Congjie

doi:10.1002/app.30902

Cited by 16 publications

(5 citation statements)

References 39 publications

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“…Compared to other modification technologies or new preparation materials, blending of polymers is preferred for membrane synthesis [11]. In our previous work, a CMCS/poly (vinyl alcohol) (PVA) blend membrane was prepared for pervaporation [12]. The prepared membrane displayed a good separation performance for ethanol/water mixtures because the membrane possesses many hydroxyl and carboxyl groups.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation

Shen

Ganning

et al. 2013

IJMS

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The miscibility of carboxymethyl chitosan/polyethylenimine (CMCS/PEI) blends was analyzed by FT-IR, TGA and SEM. Defect-free CMCS/PEI blend membranes were prepared with polysulfone (PSf) ultrafiltration membranes as support layer for the separation of CO2/N2 mixtures. The results demonstrate that the CMCS/PEI blend is miscible, due to the hydrogen bonding interaction between the two targeted polymers. For the blended membrane without water, the permeability of CO2 gas is 3.6 × 10−7 cm3 cm−2 s−1 cmHg−1 and the corresponding separation factor for CO2 and N2 gas is about 33 at the pressure of 15.2 cmHg. Meanwhile, the blended membrane with water has the better permselectivity. The blended membrane containing water with PEI content of 30 wt% has the permeance of 6.3 × 10−4 cm3 cm−2 s−1 cmHg−1 for CO2 gas and a separation factor of 325 for CO2/N2 mixtures at the same feed pressure. This indicates that the CO2 separation performance of the CMCS/PEI blend membrane is higher than that of other facilitated transport membranes reported for CO2/N2 mixture separation.

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Section: Introductionmentioning

confidence: 99%

Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation

Shen

Ganning

et al. 2013

IJMS

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“…However, the physical crosslinks are not as strong or stable as chemical crosslinks . PVA can be chemically crosslinked by acetalization with formaldehyde and glutaraldehyde or by esterification with L‐malic acid, citric acid, and fumaric acid . These aldehydes are volatile and need to consume a certain level of catalyst during the process of acetalization treatment.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effects of crosslinking processes on the swelling and hygroscopic performances of a poly(vinyl alcohol) membrane

Gao

Wang

et al. 2016

J of Applied Polymer Sci

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Poly(vinyl alcohol) (PVA) membranes crosslinked with L-malic acid were prepared, and the effects of the heat-treatment temperature and crosslinker concentration on their swelling and hygroscopic performances were investigated. Both the swelling and hygroscopic performances of the PVA membranes decreased with increasing heat-treatment temperature; while the former decreased, the latter increased with increasing crosslinker concentration. The PVA membranes were characterized with differential scanning calorimetry (DSC), acid-base titration, and Fourier transform infrared spectrometry. The DSC results indicated that there was freezing and nonfreezing water in the swollen membranes, whereas there was only nonfreezing water in the moistened membranes. In addition, acid-base titration analysis revealed that both increased heat-treatment temperature and increased crosslinker concentration increased the bilateral ester group levels (crosslinking degree) and decreased the content of freezing water. By contrast, the content of hydrophilic groups decreased and increased with increasing heat-treatment temperature and crosslinker concentration, respectively; this resulted in decreased and increased levels of nonfreezing water, respectively.

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“…Nawawi and Huang [4] however concluded that chitosan has a reasonably poor stability in water and in aqueous mixtures due to the amino group in its structure. Various modification techniques have been applied namely crosslinking [5,6], blending [7] and incorporation of zeolite [8,9] in order to improve overall properties of chitosan as well as its separation performance. Blending is the most common modification method applied as it provides a convenient way of developing materials with novel or selectively enhanced properties which are possibly superior to those of the components, besides offering the possibility in tailoring endproducts' properties [2,5,6,7,8].…”

Section: 10 Introductionmentioning

confidence: 99%

Composite Chitosan Membranes for the Separation of Methanol/methyl tert-butyl Ether Mixtures

Nawawi

Zamrud

2014

Jurnal Teknologi

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Composite membranes from chitosan blended with different ratios of chitosan were developed for the pervaporation of methanol/methyl tert-butyl ether mixtures. The composite membranes were characterized for surface morphology and sorption. Surface morphology showed chitosan and PVA were homogenously blend for all chitosan composition. Swelling characteristics of composites membrane were affected by methanol concentration as well as chitosan composition in the blend. Increasing feed temperatures and methanol concentration in the feed in pervaporation increased the flux and decreased the separation factor. The composite membranes containing 20 to 40 wt% chitosan was chosen as the preferred membrane formulation to yield fluxes ranging from 50 to 70 g/m2hr with separation factors ranging from 55 to 80 at optimum operating conditions of 30 wt% methanol in the feed and feed temperature of 50 0C.

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Preparation and characterization of CMCS/PVA blend membranes and its sorption and pervaporation performance (I)

Cited by 16 publications

References 39 publications

Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation

Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation

Experimental investigation of the effects of crosslinking processes on the swelling and hygroscopic performances of a poly(vinyl alcohol) membrane

Composite Chitosan Membranes for the Separation of Methanol/methyl tert-butyl Ether Mixtures

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