IJE TRANSACTIONS B: Applications Vol. 27, No. 8 (August 2014) 1173-1178   

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M. Shirzad Kebria and M. Jahanshahi
( Received: November 24, 2013 – Accepted in Revised Form: March 06, 2014 )

Abstract    A novel work was performed for fabrication and modification of composite nanofiltration (NF) membrane by polymerization reaction between polyethyleneimine (PEI) and triphthaloyldechloride (TPC). the main purpose of this work was water treatment. polysulfone was applied as a main polymer of substrate. The result of reaction between PEI and TPC would be formation of polyamide layer on the membrane surface. SiO2 nanoparticles were used as modification agent. The fabricated membranes were characterized by Scanning Electron Microscope (SEM), Atomic Force Microscope (AFM), contact angle measurement and FTIR analysis. MgSO4 as one of the dissolved salt in water was investigated and these fabricated membranes were utilized to remove MgSO4 from water. Properties of substrate in addition to properties of NF membrane such as steric-hindrance and Donnan exclusion lead to a rejection of 89% for MgSO4.


Keywords    Nanofiltration, Polymerization, Polyethyleneimine, SiO2 nanoparticles.


چکیده    یک کار جدید برای ساخت و اصلاح غشای کامپوزیتی نانوفیلتراسیون به کمک پلی اتیلن ایمین (PEI) و تری فتالویل دی کلرید (TPC) به روش پلیمریزاسیون بین سطحی انجام شد. پلی سولفون (PS) به عنوان پلیمر به کار رفته در زیرلایه در نظر گرفته شد. لایه حاصل از پلیمریزاسیون بین سطحی از جنس پلی آمید می باشد. نانوذره سیلیکا به عنوان عامل اصلاح کننده غشا مورد استفاده قرار گرفت. غشاهای ساخته شده توسط آزمایشات میکروسکوپ الکترونی روبشی، میکروسکوپ الکترونی اتمی، زاویه تماس آب و آنالیز طیف سنجی مورد بررسی قرار گرفتند. منیزیم سولفات به عنوان یکی از نمک های محلول در آب مورد بررسی قرار گرفت و از این غشای ساخته شده در جهت حذف مولکول های نمک منیزیم سولفات از آب استفاده شد. خصوصیات زیرلایه به علاوه خصوصیات غشای نانوفیلتر مانند خاصیت ممانعت فضایی و اثر دونان میزان پس زنی 89% را برای منیزیم سولفات در پی دارد.


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