28 شهریور 1400
سيدعبداللطيف هاشمي فرد

سیدعبداللطیف هاشمی فرد

مرتبه علمی: دانشیار
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 09177755574
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان
اثر افزودن نرمال الکان بر روی پارامترهای ساختار غشا الترافیلتراسیون پلی سولفان
نوع پژوهش مقالات در همایش ها
کلیدواژه‌ها
polyethersufone, membrane, alkanes additive, permeation
پژوهشگران سیدعبداللطیف هاشمی فرد (نفر اول) ، محسن عباسی (نفر دوم) ، مصطفی تیموری (نفر سوم)

چکیده

This study focuses on the effect of two normal alkanes as additive on the structural parameters and pure water permeate of ultrafiltration (UF) flat sheet polyethersulfone (PES) membranes. Asymmetric PES membrane was fabricated by phase inversion method and n-hexane and n-decane was used as additive and water as the coagulation bath. The effects of different concentration of these additives on the structural parameters were investigated and the prepared membranes were characterized in terms of gas permeation test, pure water permeation (PWP) and bulk porosity measurement. It was expected that two distinct phase inversions to be observed since both the polymer and the additives were insoluble in the coagulation bath and act in different ways. Experimental results revealed that by adding these additives the casting solution was still thermodynamically stable and by influencing the rate of the polymer precipitation resultant membrane were more porous compared to the neat membrane. The results demonstrated that with increasing concentration of additives in dope solution, pure water permeation, gas permeation, pore size and porosity simultaneously increased. However in the case of n-hexane, there was a maximum point at the concentration of 0.4%. In conclusion, the finding of this work showed the high influence of the n-alkanes on the structural parameters of the PES UF membranes.