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RISS 인기검색어
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- 저자 : Boon Seng Ooi (검색결과 3 건)
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Tunmise Ayode Otitoju,ABDUL LATIF AHMAD,Boon Seng Ooi 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.10
The relationships among varying bore fluid compositions containing ethanol/water were studied. The ethanol composition was varied in the ratio of 0%, 25%, 50%, 75% and 100%. The membrane dope solutions were prepared from 17.25 wt% polyethersulfone (PES), 0.75 wt% polyethylene glycol (PEG), 3 wt% silicon dioxide sol and 78.25 wt% of 1-methyl-2-pyrrolidone (NMP) via dry-jet spinning process. The membranes’ morphology as a result of varying ethanol ratio in the bore fluid composition was characterized and their effects on crude oil/water emulsion separation were evaluated. Results show that the membrane pore size and porosity decreased with increasing ethanol content in the bore fluid mixture, whereas the inner wall thickness of fibers increased. Furthermore, an increase in ethanol concentration also resulted in a slight increase in water contact angle. The use of 100/0 of ethanol/water resulted in UF membranes with the lowest performance. On the other hand, bore fluid mixture containing 25/75 ethanol/water produced membrane with the best performance for crude oil/water separation. Overall, the use of bore fluid mixture containing 25/75 ethanol/water mixture was found to be a powerful way to tune the morphological properties and performance of HF membrane.
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ABDUL LATIF AHMAD,Abdullah Adnan Abdulkarim,Suzylawati Ismail,Ooi Boon Seng 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.3
The application of response surface methodology (RSM) in preparation and optimization of membranes is important in order to reduce the effort and time needed to achieving an optimum performance. RSM was used to develop an optimum polyethersulfone (PES)/ZnO mixed matrix (MM) membrane for humic acid removal. The MMs were synthesized by dispersing various amounts of hydrophilic ZnO nanoparticles (NPs) into a solution containing PES, polyvinylpyrrolidone (PVP) and dimethylacetamide (DMAc). Flat sheet MM membranes were prepared via the phase inversion method using the central composite design (CCD). The effects of four preparation parameters, such as PES, ZnO, PVP weight percentages and solvent evaporation time, were investigated. Pure water flux (PWF), humic acid flux (HAF) and humic acid rejection (HAR) were selected as a model responses. It was shown that PES and PVP were mainly affected on both PWF and HAF. Furthermore, the interaction effect between PES and ZnO-NPs shows a significant effect on PWF, while the quadratic effects of both solvent’s evaporation time and ZnO-NPs weight percentage coupled with the interaction effect between PES and PVP weight percentage shows the most significant parameters that affects HAR. The optimization method was subjected to maximize all of the PWF, HAF and HAR. It was also determined that the optimized membrane can be synthesized from a solution containing 17.25 wt% PES, 3.62 wt% ZnO and 3.75 wt% PVP with 15 s of solvent evaporation time. The optimum values of PWF, HAF and HAR were 222.3 (L/m2 h), 94.7 (L/m2 h), and 96.34%, respectively. Thus, it can be concluded that the CCD technique is capable of optimizing PES-ZnO membrane performance.
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Wan Aisyah Fadilah Wae AbdulKadir,ABDUL LATIF AHMAD,Ooi Boon Seng,Nuur Fahanis Che Lah 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.91 No.-
The development of superhydrophobic membranes had inspired by superhydrophobic surfaces ofbiomimetic nature. Among the superhydrophobic nature surface, ‘lotus effect’ with a contact angle of150 has been widely explored for membrane distillation. In a recent development, membranedistillation highlighting the new interest of different separation approaches such as removal of metals,antibiotics, and ammonia from wastewater. This development has attracted researchers to produce adesired superhydrophobic membrane with excellent anti-wetting properties to ensure the efficiency ofthe membrane distillation process. In this review, the authors emphasize a few studies from variousresearchers regarding the superhydrophobic membrane surfaces by the different approaches ofmaterials, methods, and membrane configurations in achieving desired anti-wetting properties. Theliterature showed that the incorporation of the modified nanoparticle byfluoroalkyl silane (FAS) andelectrospinning membrane configuration has high potential properties to produce a novel anti-wettingmembrane for a unique requirement of the membrane distillation process. Factors of the significantimprovement in membrane performances have also proposed for large-scale demand. The versatility ofthe desired anti-wetting membrane has proved to use in the vast areas of applications.
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