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Morphology modification of polyethersulfone (pes) membrane through water vapour induced phase inversion

Morphology modification of polyethersulfone (pes) membrane through water vapour induced phase inversion / Mohammad Nizam Anuar
Wap disebabkan penyongsangan fasa melibatkan proses tuangan kering-basah di mana larutan cecair membran yang terdedah kepada wap bukan pelarut, seperti udara lembap, kepekatan polimer yang berbeza dan selang masa yang berbeza sebelum di rendam dalam air. Dengan mengawal kepekatan polimer dan masa pendedahan terhadap udara lembap, fasa proses penyongsangan wap teraruh boleh digunakan untuk mendapatkan membran dengan morfologi yang unik. Dalam projek ini, air / n-metil pyrrolidon (NMP) / poli eter sulfon (PES) / trietil glikol (TEG) sistem digunakan untuk sintesis membran PES melalui wap yang disebabkan secara fasa penyongsangan. Membran PES dikawal oleh kepekatan polimer, iaitu 10wt% - 12wt%, dan masa pendedahan udara lembap, iaitu 0 min, 10 min, dan 20 min. Berdasarkan kajian ini, peningkatan dalam kepekatan polimer menyumbang kepada keliangan yang lebih rendah pada membran dan seterusnya fluks air yang lebih rendah. Sementara itu, saiz liang purata berkurangan dan ia boleh membawa kepada penyerapan membran rendah dengan peningkatan dalam lembap masa pendedahan udara. Tujuan membran PES adalah untuk menapis asid humik. Masalah alam sekitar adalah disebabkan oleh kehadiran asid humik. Oleh kerana itu, prestasi membran yang terbaik boleh dikomersialkan. _______________________________________________________________________________________________________ Vapor-induced phase inversion involves a dry–wet casting process in which the dope polymer solution is exposed to a non-solvent vapor, i.e. humid air, for a different polymer concentration and a different time interval prior to immersion in a coagulation bath. By controlling the polymer concentration and humid air exposure time, the vapor-induced phase inversion process can be used to obtain membranes with unique morphologies. In this project, water/N-methyl pyrrolidone (NMP)/polyethersulfone (PES)/triethyl glycol (TEG) system is used to synthesis the PES membrane through vapor-induced phase inversion. The PES membrane is controlled by the polymer concentration, i.e. 10wt% - 12wt%, and the humid air exposure time, i.e. 0 min, 10 min, and 20 min. Based on the work, an increase in the polymer concentration leads to a lower porosity of the membrane and hence to a lower water flux. Meanwhile, the average pore size decreased and it may lead to low membrane permeation with an increase in humid air exposure time. The purpose of PES membrane is to filter out the humic acid. The environmental problem is caused by presence of humic acid. Therefore, the best of membrane performance may be commercialized.
Contributor(s):
Mohammad Nizam Anuar - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005669
Language:
English
Subject Keywords:
Vapor; dry–wet; non-solvent
First presented to the public:
6/1/2015
Original Publication Date:
7/29/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 68
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-07-29 12:25:16.281
Submitter:
Mohd Jasnizam Mohd Salleh

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