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IJE TRANSACTIONS B: Applications - Special Issue - Sustainable Technologies for Water and Environment; Guest Editor Prof. Dr. Ahmad Fauzi Ismail and Associate Guest Editor Dr. Lau Woei Jye, Universiti Teknologi Malaysia (UTM), Malaysia
Vol. 31, No. 8 (August 2018) 1446-1454    Article in Press

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  NANOCOMPOSITE ULTRAFILTRATION MEMBRANES INCORPORATED WITH ZEOLITE AND CARBON NANOTUBES FOR ENHANCED WATER SEPARATION
 
Nurul H. W. Hazmo, R. Naim, A. F. Ismail, W. J. Lau, I. Wan Azelee and Mohd Khairul Naim Ramli
 
( Received: December 15, 2017 – Accepted: March 28, 2018 )
 
 

Abstract    The objective of this work is to develop a new class of nanocomposite ultrafiltration (UF) membranes with excellent solute rejection rate and superior water flux using zeolitic imidazolate framework-8 (ZIF-8) and multi-walled carbon nanotubes (MWCNTs). The effect of ZIF-8 and MWCNTs loadings on the properties of polyvinyldifluoride (PVDF)-based membrane were investigated by introducing respective nanomaterial into the polymer dope solution. Prior to filtration tests, all the membranes were characterized using several important analytical instruments, i.e., SEM-EDX and contact angle analyzer. The addition of the nanoparticles into the membrane matrix has found to increase the membrane pore size and improve its hydrophilicity compared to the pristine membrane. The separation performance of membranes was determined with respect to pure water flux and rejections against bovine serum albumin (BSA) and humic acid (HA).The experimental findings indicated that the nanocomposite membranes in general demonstrated higher permeation flux and solute rejection compared to the pristine membrane and the use of ZIF-8 was reported to be better than that of MWCNTs in preparing nanocomposite UF membranes owing to its better flux and high percentage of solute rejection.

 

Keywords    Multi-walled carbon nanotubes, Nanoparticles, Ultrafiltration, Zeolitic imidazolate framework-8

 

چکیده   

هدف از انجام این پژوهش، توسعه یک نوع جدید از غشاهای اولترافیلتراسیون(UF) نانوکامپوزیتی است که دارای میزان پسزدگی مطلوب املاح و نیز شار بالای آب میباشد. این غشاها با استفاده از پایه ایمیدازول زئولیتی (ZIF-8) و نانولوله های کربنی چنددیواره (MWCNTs) تهیه شدند. تأثیر بارگذاری ZIF-8 و MWCNTs بر خصوصیات غشای پلی وینیل دی فلوئورید با افزودن نانومواد مربوطه به محلول پلیمری مورد بررسی قرار گرفت. قبل از آزمایش های فیلتراسیون، ویژگیهای تمام غشاهای ساخته شده با استفاده از چندین تکنیک، مانند SEM-EDX و آنالیز زاویه تماس، مشخص شد. افزودن نانو ذرات به ماتریس غشایی، سبب افزایش اندازه روزنه های غشا شد و آبدوستی آن را نسبت به غشاء اولیه بهبود بخشید. عملکرد غشاهای ساخته شده در مورد آلبومین سرم گاوی و اسید هیومیک با توجه به شار آب خالص و املاح برگشتی تعیین شد. یافته های آزمایشی نشان داد که غشاهای نانوکامپوزیتی به طور کلی دارای شارنفوذی و برگشتی بیشتری نسبت به غشاء اولیه است و استفاده از ZIF-8 در تهیه غشاهای اولترافیلتراسیون نانوکامپوزیتی به دلیل شار مطلوب و درصد بالای املاح برگشتی، بهتر از MWCNTs است.

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