کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
634522 1456069 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polymeric blend nanocomposite membranes for ethanol dehydration—effect of morphology and membrane–solvent interactions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Polymeric blend nanocomposite membranes for ethanol dehydration—effect of morphology and membrane–solvent interactions
چکیده انگلیسی

Nanocomposite membranes (NCMs) of sodium alginate/poly(vinyl pyrrolidone) blend polymers incorporated with varying concentrations of phosphotungstic acid (H3PW12O40) (PWA) nanoparticles have been prepared and used in ethanol dehydration by the pervaporation (PV) technique. Effects of filler concentration, temperature and feed water composition have been investigated to understand the PV performance of the membranes in terms of separation factor and flux. Surface morphology/energy, free volume, collective and complex range of interactions between the permeants and membranes as well as membrane swelling were studied. Arrhenius activation parameters for diffusion and permeation have been estimated. Membranes were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), and environmental emission scanning electron microscopy (ESEM). Size of the PWA nanoparticles was determined by a particle size analyzer. Surface free energies calculated from contact angles as well as free volume and fractional free volume parameters obtained from positron annihilation lifetime spectroscopy (PALS) have been used to understand the membrane transport phenomenon in terms of membrane–permeate interactions.

Figure optionsDownload high-quality image (148 K)Download as PowerPoint slideHighlights
► Nanocomposite membranes of sodium alginate/poly(vinyl pyrrolidone) blend polymers.
► Incorporated with varying concentrations of phosphotungstic acid (H3PW12O40) (PWA).
► Dehydration of ethanol by pervaporation (PV) technique.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 430, 1 March 2013, Pages 321–329
نویسندگان
, , , , , , , ,