بهبود عملکرد جداسازی غشاهای نانوفیلتراسیون برپایه پلی‌اترایمید توسط نانوذرات عامل‌دار دی اکسید تیتانیوم

نوع مقاله: مقاله پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه اراک، ایران

10.22078/pr.2019.3784.2727

چکیده

در این مطالعه، ابتدا نانوذرات تیتانیوم دی اکسید با استفاده از ترکیب ال-سیستین/گلیسیدیل پاس اصلاح گردیده و سپس نانوذرات ترکیبی تهیه شده جهت ساخت و اصلاح غشاهای نانوفیلتراسیون بر پایه پلی اتر ایمید به‌کار گرفته شد. نتایج ارزیابی طیف سنجی مادون قرمز حاکی از شکل‌گیری موفقیت‌آمیز نانو ذرات ترکیبی می‌باشد. همچنین، جهت ارزیابی ساختار و سطح غشاها از آنالیز عکس‌برداری میکروسکوپ الکترونی و میکروسکوپ نیروی اتمی استفاده شد. میزان ترواش‌پذیری و عملکرد جداسازی غشاهای ساخته شده، توسط شار آب خالص عبوری و پس‌دهی میزان نمک ارزیابی شد. نتایج به‌دست آمده حاکی از افزایش قابل توجه میزان شار آب خالص تا L/m2.h 03/22 در غشای حاوی 1 درصد وزنی نانوذرات ترکیبی می‌باشد که به دلیل حضور گروه‌های آب‌دوست در سطح غشا نسبت داده می‌شود. به‌علاوه، میزان پس‌دهی نمک سدیم سولفات در غشاهای اصلاح شده به 78% رسید که نسبت به غشای پایه پلی اتر- ایمید خالص افزایش یافت. غشای اصلاح شده حاوی نانوذرات ترکیبی کارآیی بالاتری در مقایسه با نمونه غشای حاوی ترکیب ال-سیستین/گلیسیدیل پاس و نیز غشای پایه نشان داد. نتایج به‌دست آمده حاکی از بهبود خواص ضدگرفتگی غشاهای اصلاح شده محتوی نانوذرات ترکیبی در مقایسه با نمونه پایه می‌باشد.
 

کلیدواژه‌ها


عنوان مقاله [English]

mprovement in Separation Performance of PEI-Based Nanofiltration Membrane by Using Functionalized Titanium Dioxide Nanoparticles

نویسندگان [English]

  • Samaneh Bandehali
  • Abdolreza Moghadassi
  • Fahime Parvizian
  • Sayed Mohsen Hosseini
Department of Chemical Engineering, Faculty of Engineering, Arak University, Iran
چکیده [English]

In this study, titanium dioxide nanoparticles were functionalized by L-cysteine/POSS and then utilized in fabrication and modification of PEI-based nanofiltration membranes. The FTIR results confirm the formation of composite nanoparticles decisively. Also, SEM and AFM were used in membrane characterization. The water permeability and separation performance of prepared membranes were studied by pure water flux and salt rejection considering. Obtained results showed that PWF increased up to 22.03 (L/m2.h) by applying 0.1 wt.% composite nanoparticles due to hydrophilic agents on the membrane surface. Moreover, the sodium sulfate rejection reached to 78% in modified membranes in comparison with pristine membrane. The modified membranes which contain composite nanoparticles showed more efficiency compared to the blended membrane with L-cysteine/POSS and pristine membrane. The results also exhibited improved antifouling ability for modified membrane in comparison to pristine membrane.
 

کلیدواژه‌ها [English]

  • Nanofiltration Membrane
  • Poly-Ether-Imide
  • Titanium Dioxide Nanoparticles
  • L-cysteine/POSS
  • Separation Performance
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