نتایج جستجو برای: pes membranes
تعداد نتایج: 97505 فیلتر نتایج به سال:
A practical method is reported to enhance water permeability of thin film composite (TFC) polyamide (PA) membranes by decreasing the thickness of the selective PA layer. The composite membranes were prepared by interfacial polymerization (IP) reaction between meta-phenylene diamine (MPD)-aqueous and trimesoyl chloride (TMC)-organic solvents at the surface of polyethersulfone (PES) microporous s...
Polyethersulfone-sulfonated polyethersulfone (PES-SPES)/NaY zeolite/nylon sandwich structure membranes were prepared and used to adsorb Cu2+ from water. The adsorption kinetics, isotherm, dynamic experiment, reusability discussed. experimental data showed that the Langmuir isotherm model, Dubinin–Radushkevich (D-R) pseudo-first-order kinetic model can well represent of on membrane, indicating a...
Until now, the application of a combination biological, physical, and chemical methods to eliminate contaminants from rubber industry wastewater has not been reported. The purpose our investigation is analyze use membrane techniques effect pre-treatment industrial wastewater—pre-treatment by ozone on performance modified PES-nano ZnO membrane. Modified membranes were made with phase inversion b...
abstract the current investigation was aimed toward standardization of learning environment perceptions survey (pes-hs). method: four-hundred students (204 female and 196 male) were selected through multi-stage stratified sampling method. students completed the farsi version of pes-hs. the exploratory factor analysis and confirmatory factor analysis and internal consistency were used to compute...
We aimed to investigate the relationship between membrane material and the development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polye...
در این تحقیق، پارچه پلیاستری با پوششی از نانوذرات پلی (3- آلکیلتیوفن) به روش پلیمرشدن شیمیایی و لایه نشانی بخار شیمیایی تهیه شده است. پوششدهی منسوج در محفظه پلیمرشدن در مدت زمان مشخص و دمای مورد نیاز (°c40 و h 8 در پلیمرشدن همزمان و°c65 و h2 در روش لایه نشانی بخار شیمیایی) انجام شده است. مقاومت سطحی نمونههای پوششدهی شده توسط ولت متر دیجیتال اندازهگیری شده است که درروش لایه نشانی بخار شیم...
BACKGROUND Most drug-eluting stents currently in use are coated with a polymer carrying the drug that is released for several weeks. However, a durable polymer may provoke hypersensitive reaction, delayed artery healing, and eventually stent thrombosis. The aim of this study was to investigate the safety and efficacy of a polymer-free paclitaxel-eluting stent (PF-PES) versus a polymer-based PES...
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