Change of surface morphology, permeate flux, surface roughness and water contact angle for membranes with similar physicochemical characteristics (except surface roughness) during microfiltration

Woo, Sahng Hyuck; Min, Byoung Ryul; Lee, Ju Sung

doi:10.1016/j.seppur.2017.06.030

Cited by 31 publications

(15 citation statements)

References 32 publications

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“…However, the further detailed study is necessary to clarify the reason for the decrease in surface roughness. A similar result was also reported by Woo and research team 20 in their recently published work. The hydrophilicity of prepared membranes with various content of SiO2 was also investigated by water contact angle as presented in Figure 4.…”

Section: Resultssupporting

confidence: 90%

Fabrication of Hydrophilic and Strong Pet-Based Membrane From Wasted Plastic Bottle

Mulyati¹,

Armando²,

Mawardi³

et al. 2018

RJC

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In this study, the wasted plastic bottle has been recycled as a polymeric material to fabricate PET-based membrane by adding cellulose acetate and silica to enhance the performance. Cellulose acetate was added as a sub-polymer to increase mechanical property of the PET membrane. Meanwhile, silica which derived from rice husk was used as a membrane pore-forming agent. PET/CA/SiO2 membrane was fabricated using the phase inversion technique via thermal induced phase separation method. The permeation and selectivity performances of the prepared membrane were tested. Other fundamental characterizations of the membrane such as morphological, functional groups, tensile strength, contact angle, roughness, and thickness were also analyzed. From the result, it was found that the addition of silica successfully improved the hydrophilicity as well as the filtration performance of the membrane.

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Section: Resultssupporting

confidence: 90%

Fabrication of Hydrophilic and Strong Pet-Based Membrane From Wasted Plastic Bottle

Mulyati¹,

Armando²,

Mawardi³

et al. 2018

RJC

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“…However, seen from Figures 10 and 11 again, when 5% PEG was blended with the PES casting solution, the CA of the PES/PEG5% hybrid membrane surface reduced to 68.3° (74.8° of PES membrane), but FRR 1st (74.3%) was significantly lower than that of PES/PA-OH5% (85.2%) hybrid membrane and even lower than that of PES/PA-OH3% (82.1%) hybrid membrane, which was explained that PEG molecules acting as pore-forming agents were easily soluble in water and had the weaker force with the membrane matrix during Non solvent induced phase separation (NIPS) process, which caused almost all of PEG molecules to migrate from the membrane matrix to the coagulation bath, resulting in the so-called oversegregation 20 ; in addition, the PES/PEG5% hybrid membrane had the largest roughness in all the prepared membranes (Table 3), which was also detrimental to the cleaning of the membrane. 34 In summary, it was a matter of course that the addition of PEG did not significantly improve the antifouling performance of the PES UF membrane. Thus, although the PWF of PES/PEG5% hybrid membrane in the first cycle was the highest in all the prepared PES hybrid membranes, after the second cycle, the PWF ( J w3 ) of PES/PEG5% hybrid membrane was significantly lower than that of the PES/PA-OH3% and PES/PA-OH 5% hybrid membranes (seen from the flux-time curves of Figure 6).…”

Section: Resultsmentioning

confidence: 97%

“…Yet, the water CA was determined not only by the chemical composition of the membrane surface but also by the morphology of the membrane surface (including roughness, porosity, pore size and pore size distribution), meanwhile, the latter was also another factor that affected the antifouling performance of membranes. 34…”

Section: Resultsmentioning

confidence: 99%

“…Yet, the change in the antifouling performance of the PES/PA-OH hybrid membranes was evidently inconsistent with the changes in the CA, that is, although the water CA of the PES/PA-OH5% hybrid membrane was higher than that of PES/PA-OH3% hybrid membrane, the antifouling performance of the PES/PA-OH5% hybrid membrane was superior to that of PES/PA-OH3% hybrid membrane, which can be attributed to the PES/PA-OH3% hybrid membrane with the rougher surface that was conducive to the spread of water droplets, resulting in the lower water CA. In fact, when the surface was smoother or had more hydrophilic groups, the protein molecules were more difficult to attach on and were easier to clean out, 34 –36 consequently, the PES/PA-OH5% hybrid membrane had the highest FRR 1st and R r1 , that is, the best antifouling performance.…”

Section: Resultsmentioning

confidence: 99%

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Influence of 1:4;3:6-dianhydro-d- mannitol-based polyamide as an additive on morphology, permeability and antifouling performance of PES ultrafiltration membrane

Liu

Meng

et al. 2017

High Performance Polymers

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A novel hydrophilic polyamide, PA-OH containing 1:4;3:6-dianhydro-d-mannitol (isomannide) fragment was synthesized and used as an additive to prepare a series of polyethersulfone (PES)/PA-OH hybrid membranes with different content of PA-OH by phase separation method. And the addition of PA-OH was expected to improve the hydrophilicity, permeability, and antifouling performance of the PES ultrafiltration (UF) membrane. The scanning electron microscopic and atomic force microscopic images showed that the addition of PA-OH greatly changed the morphology of membranes by increasing the porosity, pore size and pore density, and the hydrophilicity was also improved with the increased PA-OH content. Based on the UF experiment, when the PA-OH content was 3%, the fluxes of pure water and bovine serum albumin solution reached 213.1 and 92.6 L m−2 h−1, which were close to 1.5 times and 2 times those of the bare PES membrane, respectively. When the PA-OH content was 5%, the FRR1st reached 85.2%, which was distinctly higher than that of the compared PES/polyethylene glycol5% hybrid membrane of 74.3%. And the FRR2st of the PES/PA-OH5% hybrid membrane was still over 80%, which indicated its long-term antifouling performance. Thus, the PA-OH can be a candidate for the hydrophilic additives.

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“…Some membrane properties influenced the filtration performance, including hydrophilicity, roughness, porosity, and charge. Those properties dictate the interaction between the molecules in the feed and membrane surface [34,35].…”

Section: Membrane Performance In α-La Solution Filtrationmentioning

confidence: 99%

Ultrafiltration of α-Lactalbumin Protein: Acquaintance of the Filtration Performance by Membrane Structure and Surface Alteration

et al. 2021

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α-Lactalbumin is an essential protein with multiple roles in physiological and the nutritional functionalities, such as diabetic prevention, blood pressure stabilization, and cancer cell inhibition. In the present work, polyethersulfone (PES)-based membranes were developed by incorporating Pluronic F127 and carbon nanotubes with single- and multi-walled dimensions (Sw-Cnts and Mw-Cnts) as additives. The resulting membranes were evaluated for use in the filtration of α-lactalbumin protein solution. Four series of membranes, including PES pristine membrane, were fabricated via the phase inversion process. The characteristics of the membrane samples were analyzed in terms of morphology, membrane surface hydrophilicity and roughness, and surface chemistry. The characterization results show that the incorporation of additive increased the surface wettability by reducing the surface water contact angle from 80.4° to 64.1° by adding F127 and Mw-Cnt additives. The highest pure water permeability of 135 L/(m2·h·bar) was also exhibited by the PES/F127/Mw-Cnt membrane. The performance of the modified membranes was clearly better than the pristine PSF for α-lactalbumin solution filtration. The permeability of α-lactalbumin solution increased from 9.0 L/(m2·h·bar) for the pristine PES membrane to 10.5, 11.0 and 11.5 L/(m2·h·bar) for membranes loaded with Pluronic F127, Sw-Cnts, and Mw-Cnts, respectively. Those increments corresponded to 17, 22, and 28%. Such increments could be achieved without altering the α-lactalbumin rejections of 80%. Remarkably, the rejection for the membrane loaded with Sw-Cnts even increased to 89%.

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Change of surface morphology, permeate flux, surface roughness and water contact angle for membranes with similar physicochemical characteristics (except surface roughness) during microfiltration

Cited by 31 publications

References 32 publications

Fabrication of Hydrophilic and Strong Pet-Based Membrane From Wasted Plastic Bottle

Fabrication of Hydrophilic and Strong Pet-Based Membrane From Wasted Plastic Bottle

Influence of 1:4;3:6-dianhydro-d- mannitol-based polyamide as an additive on morphology, permeability and antifouling performance of PES ultrafiltration membrane

Ultrafiltration of α-Lactalbumin Protein: Acquaintance of the Filtration Performance by Membrane Structure and Surface Alteration

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