Hyperbranched polyethyleneimine induced polycationic membranes for improved fouling resistance and high RO performance
The study shows a new method for hyperbranched polyethyleneimine (HPEI) induced polycation membranes with an objective of achieving better fouling resistance and high reverse osmosis (RO) performance. Chemically crosslinked composite membrane (CCCM) was prepared with polyvinyl alcohol (PVA), male...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier Ltd.
2016
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/14298/ http://ir.unimas.my/id/eprint/14298/1/Hyperbranched%20polyethyleneimine%20induced%20polycationic%20%28abstract%29.pdf |
| Summary: | The study shows a new method for hyperbranched polyethyleneimine (HPEI) induced
polycation membranes with an objective of achieving better fouling resistance and high
reverse osmosis (RO) performance. Chemically crosslinked composite membrane (CCCM)
was prepared with polyvinyl alcohol (PVA), maleic acid (MA) and Pluronic F127 via chemical
crosslinking methodology. Polycation induced membranes were fabricated by surface
coating of HPEI onto the CCCM (PVA/MA/PluronicF127) RO membranes. Functional group
analysis, morphology and surface roughness of CCCM and HPEI-RO membranes were analyzed
by Fourier transform infrared spectroscopy, scanning electron microscopy and
atomic force microscopy respectively. The hydrophilicity and water permeability of
CCCM and HPEI-RO were examined with water contact angle measurement and RO performance
test. Optimum RO performance was obtained for HPEI-RO3 membrane with NaCl
and MgSO4, as for RNaCl = 96.1%, JNaCl = 58.2 L m�2 h�1 and RMgSO4 = 99.6%,
JMgSO4 = 15.8 L m�2 h�1 (testing with 3.28 wt.% aqueous NaCl and MgSO4 solution at 25 �C
and 55 bar). Moreover, cetyl trimethylammonium bromide (CTAB) as standard foulants
presented a smaller fouling tendency for the modified HPEI-RO3 membrane. HPEI-RO3
compared to the unmodified membrane, was able to decrease the stickiness of charged
bacteria, Gram negative Escherichia coli and Gram positive Staphylococcus epidermidis.
Therefore, the permeation flux, salt rejection and fouling resistant property of membrane
(HPEI-RO3) were significantly improved with polycation induction into the membranes. |
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