Plasma deposition of vinyl acetate onto Nylon-4 membrane for pervaporation and evapomeation separation of aqueous alcohol mixtures

Lee, Kueir‐Rarn; Chen, Rong-Yuh; Lai, Juin‐Yih

doi:10.1016/0376-7388(92)80015-c

Cited by 80 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A conventional PV apparatus was used in this study, the description of which can be found in [17]. The effective membrane area (A) was about 5 cm 2 .…”

Section: Pv Separation Of Ethanol-water Solutionmentioning

confidence: 99%

Pervaporative dehydration of ethanol-water solution through asymmetric PC membrane surface modified via residual air plasma-induced graft polymerization of HEMA

Guzman

Lee

Lai

2010

Desalination and Water Treatment

Self Cite

View full text Add to dashboard Cite

This study investigated on the surface modification of an asymmetric polycarbonate (PC) membrane by means of exposure to residual air plasma followed by graft polymerization with 2-hydroxyethyl methacrylate (HEMA) monomer. A tubular type of an evacuated reactor was used in the plasma-induced surface pretreatment. Surface grafting was conducted in a temperaturecontrolled shaking water bath. The degree of grafting was calculated by gravimetric means. Membrane characterizations were done with Fourier transform infrared spectroscopy, water contact angle measuring device, and scanning electron microscopy. The grafted PC membrane was tested for its pervaporation (PV) performance for dehydrating an aqueous ethyl alcohol solution by determining the permeation rate and the separation factor. We considered the monomer concentration, the plasma conditions, and the grafting time as the different parameters affecting the PV performance. In separating a 90 wt% ethanol in water at 25 C by PV, our findings showed that the PC membrane grafted with 30 wt% HEMA solution (PC-g-HEMA) attained the highest permeation flux of 380 g/m 2 h and separation factor of 410 (equivalent to 98 wt% water in the permeate). The conditions applied to produce such surface-modified PC film were 50 W and 90 s for the plasma treatment and 90 min and 80 C for the graft polymerization. The PV performance of the PC-g-HEMA membrane obtained from this study compared well with that of previously investigated flat-sheet membranes.

show abstract

“…A conventional PV apparatus was used in this study, the description of which can be found in [17]. The effective membrane area (A) was about 5 cm 2 .…”

Section: Pv Separation Of Ethanol-water Solutionmentioning

confidence: 99%

Pervaporative dehydration of ethanol-water solution through asymmetric PC membrane surface modified via residual air plasma-induced graft polymerization of HEMA

Guzman

Lee

Lai

2010

Desalination and Water Treatment

Self Cite

View full text Add to dashboard Cite

show abstract

“…There is a possibility to modulate the properties of the membranes using volume and surface modifications. The most commonly used membrane polymer materials for pervaporation dehydration are polyvinyl alcohol [ 13 , 14 ], polyamides and polyimides [ 15 , 16 , 17 , 18 , 19 ], polysulfone [ 20 , 21 , 22 ], polyacrylonitrile [ 23 , 24 ], chitosan [ 25 , 26 , 27 ], and aromatic polymers (e.g., polybenzoxazole and polybenzimidazole) [ 28 , 29 ], etc. These membranes are often modified by blending with other polymers [ 30 , 31 ], modifying with various reagents [ 32 ], and cross-linking by different methods [ 2 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Membranes Based on Hydroxyethyl Cellulose/Sodium Alginate for Pervaporation Dehydration of Isopropanol

et al. 2021

View full text Add to dashboard Cite

Membrane methods, especially pervaporation, are quickly growing up. In line with that, effective membrane materials based on biopolymers are required for the industrially significant mixtures separation. To essentially improve membrane transport characteristics, the application of the surface or/and bulk modifications can be carried out. In the present study, novel dense and supported membranes based on hydroxyethyl cellulose (HEC)/sodium alginate (SA) were developed for pervaporation dehydration of isopropanol using several approaches: (1) the selection of the optimal ratio of polymers, (2) the introduction of fullerenol in blend polymer matrix, (3) the selection of the optimal cross-linking agent for the membranes, (4) the application of layer-by-layer deposition of polyelectrolytes on supported membrane surface (poly(sodium 4-styrenesulfonate) (PSS)/poly(allylamine hydrochloride) (PAH) and PSS/SA). Structural and physicochemical characteristics of the membranes were analyzed by different methods. A cross-linked supported membrane based on HEC/SA/fullerenol (5%) composite possessed the following transport characteristics in pervaporation dehydration of isopropanol (12–50 wt.% water): 0.42–1.72 kg/(m2h) permeation flux, and 77.8–99.99 wt.% water content in the permeate. The surface modification of this membrane with 5 bilayers of PSS/PAH and PSS/SA resulted in the increase of permeation flux up to 0.47–3.0 and 0.46–1.9 kg/(m2h), respectively, with lower selectivity.

show abstract

“…[2][3][4][5][6][7] The performance of these modified polyamide membranes is better In a pervaporation process, it is desirable to use a than that of the original polyamide membranes. polymeric membrane with the combined characterSince polyamide materials have high crystallinistics of high permeation rate and good selectivity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of N-methylol nylon-6 membranes for pervaporation of ethanol-water mixtures

Shieh

Huang

1997

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

N-methylol nylon 6 membranes were prepared by reacting nylon-6 with formaldehyde. Elemental analysis, used to analyze the composition of modified membranes, showed that the degree of substitution increased with formaldehyde content in the reaction solution. The modified nylon-6 membranes exhibited a high affinity to ethanol. Pervaporation results for the separation of ethanol-water mixtures showed that these membranes were water-selective, indicating that the diffusion property is the dominant factor. An N-methylol nylon-6 membrane with 33% degree of substitution showed the best membrane performance. In order to control the swelling of N-methylol nylon-6 membranes in the feed solutions of high ethanol content, thermal crosslinking was applied at 180ЊC for different times. It was found that heat treatment of 10 minutes gave the optimal permselectivity.

show abstract

Plasma deposition of vinyl acetate onto Nylon-4 membrane for pervaporation and evapomeation separation of aqueous alcohol mixtures

Cited by 80 publications

References 18 publications

Pervaporative dehydration of ethanol-water solution through asymmetric PC membrane surface modified via residual air plasma-induced graft polymerization of HEMA

Pervaporative dehydration of ethanol-water solution through asymmetric PC membrane surface modified via residual air plasma-induced graft polymerization of HEMA

Novel Membranes Based on Hydroxyethyl Cellulose/Sodium Alginate for Pervaporation Dehydration of Isopropanol

Preparation of N-methylol nylon-6 membranes for pervaporation of ethanol-water mixtures

Contact Info

Product

Resources

About