Preparation of sulfonated poly(ethylene terephthalate) submicron fibrous membranes for removal of basic dyes

Abstract

In this investigation, a nanofibrous sulfonated poly(ethylene terephthalate) (SPET) membrane was prepared by electrospinning of the SPET solution in trifluoroaceticacid (TFA)/dichloromethane (DCM) mixture. The produced nanofibers had diameter ranging from 300 nm to 1 lm. The performance of this membrane's separation process was evaluated under different operating conditions. The influence of the electrospinning and filtration process parameters, such as concentration, applied voltage, deposition time, operating pressure, and filtration time on rejection of C.I. Basic Blue 3 were studied. The dead-end recirculation ultrafiltration set-up was employed. Under optimum conditions (concentration of 20% (w/v) of SPET, applied voltage of 20 kV and deposition time of 3 h) the removal of the aforementioned dye was 98%. Operating pressure has posed a significant influence on the membrane's separation performance, whereas the operating time had some effect on the separation performance. Two equilibrium adsorption isotherms: Langmuir and Freundlich were fitted to the dyes' equilibrium sorption data on SPET membrane at different feed concentrations. The Freundlich isotherm was found to well represent the measured adsorption data based on the higher coefficient of determination (r 2 ). V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 124: E190-E198, 2012

Fabrication and Characterization of Electrospun Membranes Based on “Poly(ε-caprolactone)”, “Poly(3-hydroxybutyrate)” and Their Blend for Tunable Drug Delivery of Curcumin

“…Electrospinning process represents an excellent and versatile technique for the fabrication of micro- and nanofibers using almost any type of polymer, either synthetic or natural [ 1 , 2 , 3 , 4 , 5 , 6 ]. The technological applications of electrospun fibers are many and diversified, i.e., filtration, protective clothing, wound healing and biomedical applications [ 1 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Regarding the biomedical applications, the use of electrospun fibers has been demonstrated to be very promising in particular for scaffolds in tissue engineering and drug delivery [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”

Preparation of hydrophilic dimethyl 5‐sodium sulfoisophthalate/poly(ethylene terephthalate) nanofiber composite membranes for improving antifouling properties

“…The sulfur content in SPET was measured with the C–S analyzer (The Organization of Nuclear Energy Isfahan), and this content was on par with the sulfur content of the SSI/PET1 sample. The method of preparing the solution of pristine PET and SPET was described in our previous work …”

“…We also determined the average nanofiber diameters with measurement software by measuring 100 different fibers. The average thickness of the nanofibrous membranes was measured with a thickness indicator at five different locations for each membrane sample . The membrane porosity was determined by the mass loss of the wet membrane after drying.…”

“…The contact angle measurement was performed at different parts of the membrane surface, and the reported data are the average of three measurements. In addition, the pure water flux [ J w (L h −1 m −2 )] values of the membranes were evaluated with a laboratory‐scale dead‐end recirculation system described elsewhere . A scheme of the experimental setup is presented in Figure .…”

Crosslinking assisted fabrication of ultrafine poly(vinyl alcohol)/functionalized graphene electrospun nanofibers for crystal violet adsorption

“…Proper polymer fiber fabrication is, thus, key to fulfilling such a requirement. The fabrication methods commonly used are, for instance, melt spinning, dry spinning, wet spinning, and electrospinning . Among these routes, electrospinning has drawn much interest since it is simple, economical, easy to setup, and able to offer fibers with small diameter sizes at the micro‐ or nanoscale.…”