A green approach to modify surface properties of polyamide thin film composite membrane for improved antifouling resistance

Khoo, Ying Siew; Lau, Woei Jye; Liang, Yanyan; Karaman, Mustafa; Gürsoy, Mehmet; Ismail, Ahmad Fauzi

doi:10.1016/j.seppur.2020.116976

Cited by 44 publications

(19 citation statements)

References 35 publications

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“…The impacts of plasma modification on the membrane structure were further investigated and the FESEM images as shown in Figure 8 indicate that there is no significant difference on the surface and cross-sectional morphology of the modified membranes, except a thicker selective layer (at nm-scale) is found on the membranes modified by the highest plasma deposition duration (90 s). Such a finding is interesting but in good agreement with our previous studies in which the PECVD technique was utilized to develop an extremely thin layer on the surface of thin film composite nanofiltration and reverse osmosis membranes [37] and polymeric foams [39].…”

Section: Membrane Morphologysupporting

confidence: 89%

“…This statement is also supported by the high peak intensity of -OH groups at the modified membranes as presented in Figures 3 and 4. This allows the modified membranes to have higher affinity towards water molecules [37]. The membrane with a higher degree of hydrophilicity is important for the water treatment process as it can mitigate fouling caused by protein deposition/adsorption [38].…”

Section: Membrane Surface Hydrophilicitymentioning

confidence: 99%

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Rapid Surface Modification of Ultrafiltration Membranes for Enhanced Antifouling Properties

et al. 2020

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In this work, several ultrafiltration (UF) membranes with enhanced antifouling properties were fabricated using a rapid and green surface modification method that was based on the plasma-enhanced chemical vapor deposition (PECVD). Two types of hydrophilic monomers—acrylic acid (AA) and 2-hydroxyethyl methacrylate (HEMA) were, respectively, deposited on the surface of a commercial UF membrane and the effects of plasma deposition time (i.e., 15 s, 30 s, 60 s, and 90 s) on the surface properties of the membrane were investigated. The modified membranes were then subjected to filtration using 2000 mg/L pepsin and bovine serum albumin (BSA) solutions as feed. Microscopic and spectroscopic analyses confirmed the successful deposition of AA and HEMA on the membrane surface and the decrease in water contact angle with increasing plasma deposition time strongly indicated the increase in surface hydrophilicity due to the considerable enrichment of the hydrophilic segment of AA and HEMA on the membrane surface. However, a prolonged plasma deposition time (>15 s) should be avoided as it led to the formation of a thicker coating layer that significantly reduced the membrane pure water flux with no significant change in the solute rejection rate. Upon 15-s plasma deposition, the AA-modified membrane recorded the pepsin and BSA rejections of 83.9% and 97.5%, respectively, while the HEMA-modified membrane rejected at least 98.5% for both pepsin and BSA. Compared to the control membrane, the AA-modified and HEMA-modified membranes also showed a lower degree of flux decline and better flux recovery rate (>90%), suggesting that the membrane antifouling properties were improved and most of the fouling was reversible and could be removed via simple water cleaning process. We demonstrated in this work that the PECVD technique is a promising surface modification method that could be employed to rapidly improve membrane surface hydrophilicity (15 s) for the enhanced protein purification process without using any organic solvent during the plasma modification process.

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Section: Membrane Morphologysupporting

confidence: 89%

Section: Membrane Surface Hydrophilicitymentioning

confidence: 99%

Rapid Surface Modification of Ultrafiltration Membranes for Enhanced Antifouling Properties

et al. 2020

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“…Polymers are of great demand for various applications, such as encapsulation, hydrophobic, membranes, and so on. [1][2][3][4][5][6][7][8][9][10] Polymeric thin films usually have important advantages over bulk polymers. As compared to the production of bulk polymers, polymeric thin films are produced with faster processing times and lower amounts of chemicals.…”

Section: Introductionmentioning

confidence: 99%

“…Polymers are of great demand for various applications, such as encapsulation, hydrophobic, membranes, and so on 1–10 . Polymeric thin films usually have important advantages over bulk polymers.…”

Section: Introductionmentioning

confidence: 99%

Vapor deposition of stable copolymer thin films in a batchiCVDreactor

Yılmaz

Şakalak

Gürsoy

et al. 2020

J of Applied Polymer Sci

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This study demonstrates the deposition of poly(ethylhexyl acrylate-co-ethylene glycol dimethacrylate) (P(EHA-co-EGDMA)) copolymer thin films in a batch type initiated chemical vapor deposition (iCVD) reactor. Crosslinked copolymers are desired for many applications because of their high stable properties. iCVD polymers derived by monomers bearing only one vinyl bond are usually linearly structured polymers and hence they are not durable, which is unfavorable for many real-world applications. Robust crosslinked iCVD films can be produced with the help of crosslinkers. In a typical iCVD process, copolymer thin film is produced by constantly feeding monomer vapor and crosslinker into the reactor. The monomer/crosslinker ratio should be precisely controlled for fabrication of reproducible thin films. In order to eliminate problems caused by adjusting the flowrates of precursors, a closed-batch type iCVD reactor was used for the first time in this study to produce copolymer thin films. The variation of precursors' partial pressures allowed control over the copolymer thin film structures. As compared with homopolymer, copolymers showed the better chemical and thermal stable properties. Almost 40% of the copolymer thin film remained on the substrate surface at an annealing temperature of 300 C, whereas the homopolymer film was completely removed at an annealing temperature of 280 C.

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“…NH 3 plasma was applied for the treatment of polypropylene (PP) membranes and the results show that 1 min treatment of PP improved the hydrophilicity and fouling resistance [12,13]. It has also been reported that plasma polymerized triglyme on polyamide membranes can improve fouling resistance, closely related to the pore size and surface roughness for the modified membranes [14,15].…”

Section: Introductionmentioning

confidence: 99%

Surface Antifouling Modification on Polyethylene Filtration Membranes by Plasma Polymerization

Hou¹,

Wang

Lin

et al. 2020

Materials

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Surface modification on microporous polyethylene (PE) membranes was facilitated by plasma polymerizing with two hydrophilic precursors: ethylene oxide vinyl ether (EO1V) and diethylene oxide vinyl ether (EO2V) to effectively improve the fouling against mammalian cells (Chinese hamster ovary, CHO cells) and proteins (bovine serum albumin, BSA). The plasma polymerization procedure incorporated uniform and pin-hole free ethylene oxide-containing moieties on the filtration membrane in a dry single-step process. The successful deposition of the plasma polymers was verified by Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) analyses. Water contact angle measurements and permeation experiments using cell and protein solutions were conducted to evaluate the change in hydrophilicity and fouling resistance for filtrating biomolecules. The EO1V and EO2V plasma deposited PE membranes showed about 1.45 fold higher filtration performance than the pristine membrane. Moreover, the flux recovery reached 80% and 90% by using deionized (DI) water and sodium hydroxide (NaOH) solution, indicating the efficacy of the modification and the good reusability of the modified PE membranes.

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A green approach to modify surface properties of polyamide thin film composite membrane for improved antifouling resistance

Cited by 44 publications

References 35 publications

Rapid Surface Modification of Ultrafiltration Membranes for Enhanced Antifouling Properties

Rapid Surface Modification of Ultrafiltration Membranes for Enhanced Antifouling Properties

Vapor deposition of stable copolymer thin films in a batchiCVDreactor

Surface Antifouling Modification on Polyethylene Filtration Membranes by Plasma Polymerization

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