scholarly journals Preparation of antibacterial and antifouling PSF/ZnO/eugenol membrane for peat water ultrafiltration

2019 ◽  
Vol 19 (8) ◽  
pp. 2248-2255 ◽  
Author(s):  
I Gede Wenten ◽  
Yuda S. Syaifi ◽  
Firmansyah A. Saputra ◽  
Megawati Zunita ◽  
Putu T. P. Aryanti ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Pure Water ◽  
Antibacterial Properties ◽  
Recovery Ratio ◽  
Water Contact ◽  
Hydrophilic Nature ◽  
Phase Inversion Technique ◽  
Blending Method ◽  
Antibacterial Assay ◽  
Inhibition Zones

Abstract In this work, polysulfone (PSF)-based ultrafiltration (UF) membrane with antibacterial and antifouling properties was prepared by the phase inversion technique. ZnO and eugenol were used as additives and introduced into the membrane matrix via the additive blending method. The additives could improve the performance of the PSF membrane due to their hydrophilic nature. The water contact angle (WCA) of the PSF membrane decreased from 67.7° ± 1.2° to 52.8° ± 0.8° when the additive loading was increased from 0 to 5%-wt. The PSF membrane with 5%-wt ZnO and 5%-wt eugenol had pure water permeability and humic substance rejection of 83.8 ± 3.7 L m−2 h−1 bar−1 and 95.6%, respectively. In addition, the additives were able to improve antifouling properties, e.g. a recovery ratio (FRR) of 85.4% and relative flux reduction ratio (RFR) of 30.2%. In the antibacterial assay, the membrane displayed 3 mm and 10 mm inhibition zones against Escherichia coli and peat water microorganisms, respectively, probably due to antibacterial properties of the additives.

scholarly journals Preparation and Characterization of Polysulfone Based Hollow Fibre Composite Membranes for Water Purification

2018 ◽  
Vol 22 (2) ◽  
Author(s):  
A. M. Vijesh ◽  
P. C. Shyma ◽  
V. Prakash ◽  
B. Garudachari
Keyword(s):  
Fibre Composite ◽  
Membrane Surface ◽  
Pure Water ◽  
Water Flux ◽  
Composite Membranes ◽  
Hollow Fibre ◽  
Water Contact ◽  
Cross Flow Filtration ◽  
Phase Inversion Technique ◽  
Pure Water Flux

Nanofiltration membranes are gaining more importance in the field of water treatment especially in desalination plants. Hollow fibre membranes have been preferred over other membrane configurations due to their high membrane surface area to module volume, mechanical property and easy handling. In the present work, we prepared new type of polysulfone (PSf) composite hollow fibre membranes by blending PSf with polyvinylpyrrolidinone-nitrobenzene (PVPD) in different compositions. New membranes were fabricated using wet-jet phase inversion technique. The resultant composite membranes were characterized by various analytical techniques such as water contact angle, SEM, DSC, TG. Pure water flux of the membranes was measured using cross-flow filtration techniques. The study revealed that increased composition of PVPD in casting solution resulted in a highly porous membrane structure and the pure water flux of the membranes increases in the same order.

scholarly journals Design and Construction of Ag@MOFs Immobilized PVDF Ultrafiltration Membranes with Anti-bacterial and Antifouling Properties

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Wentao Xu ◽  
Huaqiang Zhuang ◽  
Zehai Xu ◽  
Mianli Huang ◽  
Shangchan Gao ◽  
...  
Keyword(s):  
Composite Material ◽  
Pure Water ◽  
Water Flux ◽  
Antibacterial Properties ◽  
Analytical Techniques ◽  
High Water ◽  
Fouling Resistance ◽  
Ultrafiltration Membranes ◽  
Water Contact ◽  
Pure Water Flux

In this work, Ag nanoparticle loading Mg(C10H16O4)2(H2O)2(Ag@MOF) composite material was successfully prepared by a facile strategy, and subsequently Ag-MOFs were used to modify the PVDF ultrafiltration membranes to obtain fouling resistance and higher water flux. The as-prepared PVDF membranes were systematically characterized by a series of analytical techniques such as Water Contact Angle (CA), Scanning Electron Microscopy (SEM), and SEM-mapping. Furthermore, the performance of membranes on antibacterial properties, the pure water flux, and fouling resistance was investigated in detail. Those results showed that the membrane modified by Ag@MOFs containing 30% Ag had the higher anti-bacterial performance, and the clear zone could be increased to 10 mm in comparison with that of blank membrane. Meanwhile, the pure water flux of Ag@MOF membranes increased from 85 L/m2 h to 157 L/m2 h, and the maximum membrane flux recovery rate (FRR) of 95.7% was obtained using SA as pollutant, which is attributed to the introduction of Ag@MOF composite material. Based on the above experimental results, it can be found that the Ag-MOF membranes displayed the excellent antibacterial activity, high water flux, and fine fouling resistance. This work provides a facile strategy to fabricate the Ag@MOFs modified membranes, and it shows an excellent anti-bacterial and water flux performance.

Preparation and characterization of positively charged polysulfone nanofiltration membranes

2013 ◽  
Vol 33 (4) ◽  
pp. 369-376 ◽  
Author(s):  
Rajagopalan Mahendran ◽  
Prashant Kumar Bhattacharya
Keyword(s):  
Phase Inversion ◽  
Pure Water ◽  
Weight Ratio ◽  
Feed Solution ◽  
Membrane Resistance ◽  
Proton Nuclear Magnetic Resonance ◽  
Electron Microscopic ◽  
Polymer Backbone ◽  
Inversion Technique ◽  
Phase Inversion Technique

Abstract Charged nanofiltration (NF) membranes were prepared from aminated polysulfone (APSF) via a phase inversion technique, by varying the polymer and solvent weight ratios. A two-step phase inversion technique, adopted for the preparation of NF membranes, involved chloromethylation, and subsequent amination of the polymer, polysulfone (PSF). Fourier-transform infrared (FT-IR) and proton nuclear magnetic resonance (1H-NMR) spectroscopic analyses of the prepared chloromethylated PSF (CPSF) membrane confirmed the incorporation of chloromethylated groups on the polymer backbone. Also, the separation capability of the prepared membranes was evaluated by compaction studies, pure water fluxes (PWF) at different pressures, and hydraulic membrane resistance measurements. Furthermore, scanning electron microscopic (SEM) and atomic force microscopic (AFM) images revealed that the pore size and pore distribution decreased with increase in the polymer weight ratio. In addition, the functionality of the prepared membranes as a nano-filter was analyzed by constructing a stirred batch NF cell and evaluated towards a feed solution containing different concentrations of Cr (III) ions. The performance of the prepared membrane was compared with commercially available (NFT-50) NF membrane.

Preparation and Properties of Poly(ether imide) Ultrafiltration Membrane Modified with Polyether Diamine

2014 ◽  
Vol 931-932 ◽  
pp. 63-67 ◽  
Author(s):  
Pattama Phomdum ◽  
Watchanida Chinpa
Keyword(s):  
Membrane Surface ◽  
Pure Water ◽  
Water Flux ◽  
Skin Layer ◽  
Recovery Ratio ◽  
Water Contact ◽  
Pure Water Flux ◽  
Modified Membrane ◽  
Bsa Rejection ◽  
Scanning Electron

In this study, the morphologies, the hydrophilicity, and the anti-fouling of poly (ether imide) (PEI) membrane modified with an aqueous solution of polyether diamine predominantly PEO backbone (PEO-diamine) were investigated. A decrease in water contact angle and an increase in water absorption ratio indicated the hydrophilicity of modified membrane. Scanning Electron Microscope (SEM) showed a thinner skin layer of membrane and pores on the membrane surface for modified PEI membrane providing an increment of pure water flux and a reduction of BSA rejection of membrane. Under the protein filtration study, it was found that the flux recovery ratio of modified PEI membrane was higher than that of the unmodified PEI membrane.

Fabrication and Characterization of Copper-Chelated Polyethersulfone/Polydopamine Microfiltration Membrane for Antifouling Applications

2021 ◽  
Vol 878 ◽  
pp. 23-27
Author(s):  
Xech Rafael Aldrei U. Dela Paz ◽  
Rhoda B. Leron
Keyword(s):  
Cell Structure ◽  
Pure Water ◽  
Water Flux ◽  
Antibacterial Properties ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Water Contact ◽  
Hydrophilic Character ◽  
Pure Water Flux ◽  
Pes Membrane

In this work, we investigated the applicability of polyethersulfone/polydopamine/copper (II) (PES/PDA/Cu2+) membrane composite in microfiltration. Pristine PES membrane was prepared via non-induced phase separation (NIPS), and the surface was modified by coating with PDA and deposition of Cu (II) to enhance its physical and antibacterial properties. The membrane was characterized using energy-dispersive X-ray spectroscopy, scanning electron microscopy and water contact angle measurement. The hydrophilic character of the PES membrane significantly increased and the mechanical properties were greatly improved. Results showed that the porosity of the membrane was affected by the concentration of the polymer in the casting solution, and the membrane was suitable for filtration application due to its open-cell structure. Pure water flux was enhanced upon surface modification implying that hydrophilicity has more influence on the flux than the shrinking of the pore size. The antibacterial assay suggested that the membranes possess antibacterial property.

scholarly journals Effect of Methanol Concentration on the Performance of Asymmetric Cellulose Acetate Reverse Osmosis Membranes Using Dry/Wet Phase Inversion Technique

2012 ◽  
Author(s):  
Ani Idris ◽  
Ahmad Fauzi Ismail ◽  
S. Iswandi ◽  
Simon J. Shilton
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Phase Inversion ◽  
Pure Water ◽  
Permeation Rate ◽  
Transport Parameter ◽  
Water Permeation ◽  
Inversion Technique ◽  
Phase Inversion Technique ◽  
Wet Phase Inversion

Membran asimetrik telah dihasilkan daripada larutan polimer multikomponen yang terdiri daripada selulosa asetat, aseton formamid dan metanol. Dalam kajian ini, teknik fasa balikan kering/basah telah digunakan dan kehadiran metanol dikaji. Selain itu, kajian ini juga mengemukakan isu asas yang terlibat dalam pengubahsuaian larutan tuangan kepingan rata, bagi menghasilkan larutan yang berpotensi untuk digunakan bagi penyediaan membran gentian geronggang, yang mempunyai lapisan memilih yang bebas daripada kecacatan. Pengubahsuaian komposisi larutan multikomponen telah menghasilkan membran osmosis balikan yang berbeza prestasinya. Prestasi membran ditentukan secara uji kaji oleh pemboleh ubah asas seperti fluks air tulen (PWP), kadar kebolehtelapan air garam (PR) dan kadar buangan. Daripada data tersebut, parameter sekunder seperti pemalar kebolehtelapan air tulen (A), parameter pengangkutan bahan larut (DAM /Kδ) dan pekali pemindahan jisim (k) dapat ditentukan. Parameter tersebut adalah penting dalam meramal prestasi membran osmosis balikan dan pencirian morfologi membran. Keputusan uji kaji menunjukkan bahawa kehadiran metonal dalam formulasi larutan polimer telah meningkatkan kadar buangan dan aliran fluks. Nilai (DAM/Kδ) yang lebih rendah bagi larutan rujukan menunjukkan bahawa purata saiz liang pada permukaan membran secara bandingan adalah lebih kecil. Kata kunci: Asimetrik membran; osmosis balikan; selulosa asetat; fasa balikan. Asymmetric membranes were prepared from a multicomponent dope polymer solution consisting of cellulose acetate, acetone, formamide and methanol. In this work, the dry/wet phase inversion technique is used and the presence of methanol is studied. In addition, this work also presents the fundamental issues involved in altering flat sheet casting solutions to produce solutions, potentially useful for preparing hollow fibers within, defect free selective layers. Variations in the composition of multicomponent casting solution resulted in membranes with drastically different reverse osmosis performance. The membrane performance are determined experimentally by primary parameters such as the pure water permeation rate (PWP), salt permeation rate (PR) and rejection rates. From these data, the secondary parameter such as pure water permeability constant (A), solute transport parameter (DAM/Kδ) and mass transfer coefficient (k) are determined. These parameters are important in the prediction of reverse osmosis performance and also in characterising membrane morphology. The results revealed that the presence of methanol in the dope formulation increases the percentage of salt rejection and flux flow. The relatively lower value of (DAM /Kδ) for a reference solute indicates a relatively a relatively smaller average pore size on the membrane surface. Key words: Asymmetric membrane; reverse osmosis; cellulose acetate; dry/wet phase inversion

scholarly journals Novel High Flux Poly(m-phenylene isophtalamide)/TiO2 Membranes for Ultrafiltration with Enhanced Antifouling Performance

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2804
Author(s):  
Mariia Dmitrenko ◽  
Anna Kuzminova ◽  
Andrey Zolotarev ◽  
Vladislav Liamin ◽  
Tatiana Plisko ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
Optimal Transport ◽  
Membrane Separation ◽  
Pure Water ◽  
Cutting Fluid ◽  
Separation Performance ◽  
Recovery Ratio ◽  
High Flux ◽  
Water Contact ◽  
Tio2 Particles

Wide application of ultrafiltration in different industrial fields requires the development of new membranes with tailored properties and good antifouling stability. This study is devoted to the improvement of ultrafiltration properties of poly(m-phenylene isophtalamide) (PA) membranes by modification with titanium oxide (TiO2) particles. The introduction of TiO2 particles improved membrane separation performance and increased antifouling stability and cleaning ability under UV irradiation. The developed membranes were characterized by scanning electron and atomic force microscopy methods, the measurements of water contact angle, and total porosimetry. The transport properties of the PA and PA/TiO2 membranes were tested in ultrafiltration of industrially important feeds: coolant lubricant (cutting fluid) emulsion (5 wt.% in water) and bovine serum albumin (BSA) solution (0.5 wt.%). The PA/TiO2 (0.3 wt.%) membrane was found to possess optimal transport characteristics in ultrafiltration of coolant lubricant emulsion due to the highest pure water and coolant lubricant fluxes (1146 and 32 L/(m2 h), respectively), rejection coefficient (100%), and flux recovery ratio (84%). Furthermore, this membrane featured improved ability of surface contamination degradation after UV irradiation in prolonged ultrafiltration of BSA, demonstrating a high flux recovery ratio (89–94%).

Long-Term Stable Metal Organic Framework (MOF) Based Mixed Matrix Membranes for Ultrafiltration

2020 ◽  
Author(s):  
Muayad Al-shaeli ◽  
Stefan J. D. Smith ◽  
Shanxue Jiang ◽  
Huanting Wang ◽  
Kaisong Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Mixed Matrix Membranes ◽  
Recovery Ratio ◽  
Mixed Matrix ◽  
Water Contact ◽  
Membrane Performance ◽  
Metal Organic ◽  
Matrix Membranes

<p>In this study, novel <a>mixed matrix polyethersulfone (PES) membranes</a> were synthesized by using two different kinds of metal organic frameworks (MOFs), namely UiO-66 and UiO-66-NH<sub>2</sub>. The composite membranes were characterised by SEM, EDX, FTIR, PXRD, water contact angle, porosity, pore size, etc. Membrane performance was investigated by water permeation flux, flux recovery ratio, fouling resistance and anti-fouling performance. The stability test was also conducted for the prepared mixed matrix membranes. A higher reduction in the water contact angle was observed after adding both MOFs to the PES and sulfonated PES membranes compared to pristine PES membranes. An enhancement in membrane performance was observed by embedding the MOF into PES membrane matrix, which may be attributed to the super-hydrophilic porous structure of UiO-66-NH<sub>2</sub> nanoparticles and hydrophilic structure of UiO-66 nanoparticles that could accelerate the exchange rate between solvent and non-solvent during the phase inversion process. By adding the MOFs into PES matrix, the flux recovery ratio was increased greatly (more than 99% for most mixed matrix membranes). The mixed matrix membranes showed higher resistance to protein adsorption compared to pristine PES membranes. After immersing the membranes in water for 3 months, 6 months and 12 months, both MOFs were stable and retained their structure. This study indicates that UiO-66 and UiO-66-NH<sub>2</sub> are great candidates for designing long-term stable mixed matrix membranes with higher anti-fouling performance.</p>

THE FEASIBILITY OF KAOLIN AS MAIN MATERIAL FOR LOW COST POROUS CERAMIC HOLLOW FIBRE MEMBRANE PREPARED USING COMBINED PHASE INVERSION AND SINTERING TECHNIQUE

2017 ◽  
Vol 79 (1-2) ◽  
Author(s):  
Siti Khadijah Hubadillah ◽  
Mohd Hafiz Dzarfan Othman ◽  
A. F. Ismail ◽  
Mukhlis A. Rahman ◽  
Juhana Jaafar
Keyword(s):  
Phase Inversion ◽  
Low Cost ◽  
Pure Water ◽  
Porous Ceramic ◽  
Water Flux ◽  
Hollow Fibre ◽  
Hollow Fibre Membrane ◽  
Fibre Membrane ◽  
Pure Water Flux ◽  
And Performance

Ceramic hollow fibre membrane (CHFM) demonstrated superior characteristics and performance in any separation application. The only problem associated with this kind of technology is the high cost. In order to effectively fabricate and produce low cost porous CHFM, a series of CHFMs made of kaolin were fabricated via combined phase inversion and sintering technique. The CHFMs from kaolin named as kaolin hollow fibre membranes (KHFMs) were studied at different kaolin contents of 35 wt.%, 37.5 wt.% and 40 wt.% sintered at 1200ºC. The result indicated that by varying kaolin contents, different morphologies were obtained due to changes in the viscosity of ceramic suspension containing kaolin. The optimum kaolin content for KHFM was identified. It was found that KHFM prepared at 37.5 wt% has a mechanical strength and pure water flux of A and B respectively.  

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