Polymer evolution of a sulfonated polysulfone membrane as a function of ion beam irradiation fluence

Chennamsetty, Rama; Escobar, Isabel C.; Xu, Xinglong

doi:10.1016/j.memsci.2006.01.033

Cited by 22 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several techniques have been employed to impart specific properties to membranes 5. These include (1) a radiation technique,6–11 (2) glow‐discharge, low‐temperature plasma treatments,12–16 (3) redox reactions,17–20 and (4) a light‐induced technique 21, 22. Among the techniques, the light‐induced technique has many advantages, including a low activation energy, rapid reaction rate, high monomer conversion and low monomer residue, and low‐ or room‐temperature operation.…”

Section: Introductionmentioning

confidence: 99%

Development of light‐induced functionalized asymmetric polysulfone membranes

Yogesh

Paul

Basu

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

The introduction of functionality into asymmetric polysulfone membranes has widened their applicability. They are modified with acrylic acid with a light‐induced technique. Fourier transform infrared, contact‐angle, porometry, and atomic force microscopy studies have been carried out to characterize the membranes. The performance of the modified membranes has been investigated with permeation measurements. The salt rejection (NaCl and Na2SO4) performance of the modified membranes shows evidence of functionalization on them. The modification of the membranes also develops the retention of small organic molecules (glucose and 2,4‐dichlorophenol). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007

show abstract

Section: Introductionmentioning

confidence: 99%

Development of light‐induced functionalized asymmetric polysulfone membranes

Yogesh

Paul

Basu

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…FTIR spectra of the virgin and irradiated polysulfone membranes have shown increase in the peak heights at 690 cm À1 wavenumber and decrease in peak heights at 920 cm À1 and 1041 cm À1 wavenumbers, which correspond to the C-S-C bond, C-H bond out of plane vibrations and SO 3 bond, respectively (19). Ion beam irradiation resulted in breaking of SO 3 and C-H bonds along with the formation of C-S-C bonds.…”

Section: Resultsmentioning

confidence: 97%

Effect of Ion Beam Irradiation on Two Nanofiltration Water Treatment Membranes

Chennamsetty

Escobar

2008

Separation Science and Technology

Self Cite

View full text Add to dashboard Cite

Ion beam irradiation has long been recognized as an effective method for the synthesis and modification of diverse materials, including polymers. Ion beam irradiation is the bombardment of a substance with energetic ions. When the ions penetrate through the surface of a membrane, they may eliminate tall peaks and deep valleys, resulting in an overall reduction in surface roughness. Two nanofiltration membranes, one with a sulfonated polysulfone selective layer and the other with an aromatic polyamide selective layer, were used to study the effects of ion beam irradiation on surface morphology, microstructure, and performance. A beam of 25 keV H þ ions with four irradiation fluences (1 Â 10 13 ions=cm 2 , 5 Â 10 13 ions=cm 2 , 1 Â 10 14 ions=cm 2 and 5 Â 10 14 ions=cm 2 ) was used for ion beam irradiation of the membrane. Atomic face microscopy (AFM) analysis show that the roughness of the membranes decreased after irradiation. An increase in flux after ion beam irradiation was also observed. Hydrophobicity, pore size distribution, and selectivity of the membrane were not affected by ion beam irradiation.

show abstract

“…noncorro ¼ non-corrosive. Ion beam irradiation is mostly used to modify/ reduce the roughness of the membrane surface in which ions bombard the membrane surface which smooth out the peaks on the membrane surface [30]. Lower flux decline and less cake layer accumulation was experienced on membranes that had been tested using ion bean irradiation.…”

Section: Literature Review In Membranementioning

confidence: 99%

Design of ILEDR for brackish groundwater: A literature review approach

Myint¹,

Ghassemi²,

Nirmalakhandan³

2010

Desalination and Water Treatment

View full text Add to dashboard Cite

A literature review was done in details in desalination by using electrodialysis reversal (EDR). All available data -source of water entered into pretreatment and/or directly into EDR, physicochemical characteristics of water, targeted pollutants, methods and the reasons for the pretreatments, specifications used of EDRs, developments/improvements in EDR, fouling causing compounds and methods to control fouling, membrane types, membrane assembly, spacer, and concentrate management, method, and recovering of ions were searched and summarized in Tables 1-3. From the tables, the concentrations profiles of the targeted pollutants were observed in different sub-processes (i.e., pretreatment, ERD dilute and concentrate streams). The percentage removals of individual ion from different literatures were compared. The concentrations of fouling causing compounds (for examples, CaSO 4 and MgSO 4 ) in concentrated streams were eliminated by individual separation process with the specific different types of permselective membranes in four different stages. All these summarized data were used as tools, references, and comparisons to design and select the sub-processes in ILEDR project to treat the brackish groundwater into the drinking water. Design includes designs I (using a single type of membrane pair) and II (using four different types of mono-and di-valent permselective membrane). Permselective membrane design shows 7% cost saving while comparing to the single type of membrane design with the same water recovery rate, the same demineralization rate, and the same membrane life. The saving increases up to 15-18% if membrane life is considered in the design.self-cleaning by reversal the chemical reactions, electricity driving force, and the flows. The effectiveness of current-reversal process of EDR are shattering and detaching polarization films four times/hour to prevent polarization scale; contravention up freshly precipitated scale or seeds of scale and flushing them back into waste stream before they can cause scratch to membrane; reducing slime formations on membrane surface; reducing problems associated with the use of chemicals; cleaning electrodes with acid automatically during alternative anodic operation [4] in reversal. There is a period (1-2 min [4]) instantaneously following the polarity reversal, the waters from both dilute and concentrate are required to send back to the feed stream or diverted to waste because these waters are ''off specification''.EDR efficiency depends on method to prevent membrane from fouling; ion's charge and mobility, solution conductivity, relative concentrations, applied voltage, and the characteristics of the ion-exchange membranes, especially its permselectivity [5]; system design [6,1]; materials used in membrane [7].EDR is not cost effective at plant capacity lower the 40 m 3 /h while comparing with R.O; Elyanow and Persechino recommended that high recovery (94%), elevated SDI (6-12), potential for biofouling, hard-totreat, high hardness, lower salinity waters (from 200 to 5,000...

show abstract

Polymer evolution of a sulfonated polysulfone membrane as a function of ion beam irradiation fluence

Cited by 22 publications

References 17 publications

Development of light‐induced functionalized asymmetric polysulfone membranes

Development of light‐induced functionalized asymmetric polysulfone membranes

Effect of Ion Beam Irradiation on Two Nanofiltration Water Treatment Membranes

Design of ILEDR for brackish groundwater: A literature review approach

Contact Info

Product

Resources

About