The effect of polymer concentration on flux stability of polysulfone membrane

Ariono, Danu; Aryanti, P.T.P.; Subagjo, S.; Wenten, I Gede

doi:10.1063/1.4968301

Cited by 40 publications

(17 citation statements)

References 34 publications

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“…Flux values decreased significantly due to the increasing concentration of M. oleifera seeds powder to the mixed materials. The same result was obtained in a different study [41], with their work on of high flux polysulfone membranes. Another research was done and reported that high flux membranes were produced, and testing the performance in a constant flux test [42].…”

Section: Effect Of Adding M Oleifera Seeds Powder On Membrane Fluxsupporting

confidence: 85%

High-Throughput Microfiltration Membranes with Natural Biofouling Reducer Agent for Food Processing

et al. 2018

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The effect of natural antibiotics Moringa oleifera seeds powder in cellulose acetate membranes as biofouling reducer agent was investigated. Mixed matrix membranes (MMM) were synthesized by adding 100 mesh M. oleifera seeds powder with variation of three concentrations (1 wt%, 2 wt%, and 3 wt%), into a mix polymer solution of CA (cellulose acetate) and two different solvents, i.e., DMF (dimethylformamide) and DMAc (dimethylacetamide). The synthesized membranes morphology was observed under scanning electron microscopy and from the images can be seen that the membranes made of DMAc formed rather large macrovoid as compared to DMF-based membranes. The microstructure affected the water flux through the membranes, in which the DMAc membranes provided a higher flux value and served as high-throughput microfiltration membranes. Antibacterial properties of MMM were tested using Escherichia coli adhesion onto membrane surfaces. The results showed that M. oleifera has been proven to eradicate E. coli activity on the membrane surfaces due to interaction between bacterial cells and phenolic compounds from M. oleifera, through absorption processes involving hydrogen bonds. two or more different properties of components combined, to achieve a better separation performance. In order to promote antifouling properties, some combination of functionalized fillers and polymer matrixes have been used, such as a combination of nanoparticles of anatase TiO 2 /polysulfone [10] and Ag-loaded graphene oxide/polyethersulfone [11]. Those combination were effective, however the use of metal components as fillers, e.g., silver particles, might be unsafe for membrane that is used for food processing application. The use of plant-based subtances, might provide a more reliable and safe anti-biofoulant, such as the utilization of cardanol [12]. In this study, a natural antibacterial M. oleifera seeds powder is evaluated to be employed as filler to the cellulose acetate polymer matrix to form anti-biofouling MMM.M. oleifera could be utilized against Gram positive and negative bacteria [13]. Recombinant protein inside M. oleifera seeds is able to agglomerate Gram positive and negative bacterial cells [14]. By its properties, Moringa seeds could potentially be used as for environmentally friendly antibiofouling, because these natural ingredients are not harmful, even if used in large quantities when compared with chemicals or metals that are commonly used as agents to reduce biofouling.As for polymeric matrix, cellulose acetate has been chosen due to some beneficial properties. Cellulose acetate has good properties as a membrane polymer for food processing due to renewable, biodegradable, biocompatible, non-toxic, and inexpensive subtances [15,16]. Cellulose acetate has relatively thermal and chemical stability [17], because cellulose has a rich of hydroxyl groups and it is able to form a strong hydrogen bonds that could not be separated easily [18]. Cellulose acetate are also extraordinary hydrophilic, which can be used for minimizing fouling on t...

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Section: Effect Of Adding M Oleifera Seeds Powder On Membrane Fluxsupporting

confidence: 85%

High-Throughput Microfiltration Membranes with Natural Biofouling Reducer Agent for Food Processing

et al. 2018

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“…The selectivity of the membrane is improved by the addition of acetone into the polymer solution, which resulted in higher rejection of humic acid [29]. In other research, The effect of PSf concentration on the UF membrane performances during peat water filtration at various operating pressure [30]. They blended PSf polymer with PEG400 (25%wt) and acetone (4%wt) in DMAC solvent.…”

Section: ''""mentioning

confidence: 99%

“…The experimental procedures refer to our previous work, as shown in Figure 2 [29,30]. A circular UF membrane module was used to measure water flux and rejection of humic acid during 2 (two) hours of peat water filtration.…”

Section: Flux and Selectivity Measurementmentioning

confidence: 99%

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Aryanti

Noviyani

Kurnia

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this research, UF membrane was prepared by blending polysulfone (PSf) in DMAc with the addition of PEG400 and low concentration of acetone as additives. The effect of PSf/PEG400 and polymer/solvent ratio on the performance of PSf membrane was investigated during two hours of peat water filtration. The results showed that the increase of ratio PSF/PEG400 from 1:1 to 1:2.5 improved the membrane hydrophilicity. It was indicated by a decrease of water contact angle from 62 o to 33 o and increased water content in membrane structure from 65 to 74,5%. In addition, the pure water flux also increased up to 200 times. A stable flux is achieved when the ratio PSf/PEG is 1:2 and resulted in 84% rejection of humic acid. The increase of polymer concentration in the membrane solution reduced the pure water flux but increased the rejection of humic acid. Higher polymer concentration in membrane solution reduced fouling tendency towards the membrane surface. It showed that flux decline was reduced from 60% to 40% when the ratio of polymer/solvent concentration was changed from 40/60 to 50/50.

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“…The separation performances of a polymer membrane are determined by its intrinsic properties such as polymer crystallinity, hydrophobicity/hydrophilicity, generated charge, surface roughness, as well as porous structure across the membrane [13][14][15][16]. According to their average pore diameter, membranes can be classified into four classes: (1) conventional filtration (10-100 µm), microfiltration (0.1-10 µm), ultrafiltration (1-100 nm) and reverse osmosis (~0.1 nm) [17,18].…”

Section: Introductionmentioning

confidence: 99%

Recent progress in microfiltration polypropylene membrane fabrication by stretching method

et al. 2018

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Microfiltration polypropylene (MF-PP) membrane has been widely used in many industries due to their excellent combination of good separation performances and low production cost. In addition to membrane configuration, the structure of MF-PP membrane also plays an important role in separation performance. MF-PP membrane is commonly produced by thermal induced phase separation (TIPS) and stretching. TIPS is the simplest one where the polymer is dissolved in a solvent at a decent temperature and then cooled to induce phase separation which leads to the formation of microporous structure. However, this method is limited by the nature of PP that is difficult to dissolve in organic solvents and the solvent-contaminated effluent produced during the fabrication process. Therefore, the stretching method is more favorably used. The Stretching method involves four processing stages in sequence (i.e. melt-extrusion, annealing, stretching, and heat setting). Polymer composition, extrusion draw ratio, as well as stretching rate and temperature, are important parameters that significantly affect the pore structures evolved and thus the properties as well as the performances of MF-PP membrane. In this paper, the recent development of MF-PP fabrication by stretching methods as well as the parameters involved in each method will be reviewed and discussed comprehensively.

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The effect of polymer concentration on flux stability of polysulfone membrane

Cited by 40 publications

References 34 publications

High-Throughput Microfiltration Membranes with Natural Biofouling Reducer Agent for Food Processing

High-Throughput Microfiltration Membranes with Natural Biofouling Reducer Agent for Food Processing

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Recent progress in microfiltration polypropylene membrane fabrication by stretching method

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