Trade-off issue and membrane fouling remain two major issues in the utilization of technology for water treatment due to reduced permeability lifetime. In our study, we employed 3-aminopropyltriethoxysilane modified bentonite (BNTAPS) as an anti-fouling modifier prepare polyvinylidene fluoride (PVDF)-based membranes via phase inversion method. The effects BNTAPS concentration on physical, mechanical, morphological, filtration performance hybrid have been investigated. It was found that...

Water pollution is a major challenge in the industrial era that gained attention of researchers, especially for dye wastewater. Membrane technology applied to address this issue due its efficient and effective process. MIL-100(Cr) metal-organic framework becomes an interesting material membrane highly porous characteristics (pore sizes 24 Å 29 Å), large surface area, decent stability. In study, polyvinylidene fluoride (PVDF) was modified with fabricate PVDF/MIL-100(Cr) mixed matrix membranes...

This study examines the preparation of PVDF hybrid membranes mixed with natural zeolite mordenite, which are functionalized various organosilanes, i.e., 3-aminopropyl-triethoxysilane (APTES), 3-ethylenediaminopropyl-trimethoxysilane (EDAPTMS), and 3-mercapto-propyl-trimethoxysilane (MPTMS) compounds. The addition mordenite-MPTMS increased β fraction on membrane surfaces improved hydrophilicity. shape macropores in PME tends to be round, largest size among other resulting highest porosity....

Platinum (Pt) nanoparticles have been synthesized from a precursor solution of potassium tetrachloroplatinate (K 2 PtCl 4 ) using matrix bacterial cellulose (BC). The formation Pt occurs at the surface and inside BC membrane by reducing with hydrogen gas reductant. obtained variations concentration, between 3 mM 30 mM, studied X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), thermogravimetry analysis (TGA). Based on patterns, particles sizes 6.3...

Abstract BACKGROUND: Cellulose acetate membranes are frequently used for pressure‐driven membrane processes. The aim of this work was to prepare cellulose from nata‐de‐coco using coconut water as starting material. use lignin‐free material will certainly minimize the chemicals usually needed in traditional pulps and substitute wood, which helps prevent global warming preserves nature well. RESULTS: Coconut fermented by Acetobacter xylinum 6 days produce nata‐de‐coco, then acetylated...

Abstract Fuel cells are being developed to overcome the global energy crisis. The objective of this research is prepare an environmental‐friendly and cheap material as polymer electrolyte membrane. Coconut water was fermented by Acetobacter xylinum produce nata‐de‐coco phosphorylation carried out microwave‐assisted reaction. resulting membranes characterized ion exchange capacity, contact angle, proton conductivity, swelling index, methanol permeability, mechanical properties measurement...

This study aims to the conformation, hydrogen bond network, and stabilities of all possible intermolecular interactions in phosphorylated nata de coco membrane with water (NDCF-(H2O)n, n = 1-5). Analysis natural orbital (NBO) was performed measure relative strength bonding interactions, charge transfer, particularly n-σ * O-H take into account effect on molecular structure. All calculation were using density functional theory (DFT) method, at B3LYP level 6-311 G** basis set. The transfer...

The aim of this study is to investigate the effect natural zeolites characteristics on adsorption capacity Pb 2+ from an aqueous environment. used were originated 3 regions in Indonesia. i.e. Bayah, Banten (coded as ZB) and two samples South Lampung ZL-1 ZL-2) Nanggung, Bogor (ZN). each zeolite evaluated through a series detailed analysis including XRD, FTIR, XRF, SEM N 2 physisorption. It was revealed that ZB, ZL-2 dominated by clinoptilolite (HEU) frameworks while major phase ZN mordenite...

Nowadays, biodiesel has become more attractive in the quest for a novel fuel source due to its environmental benefits and biodegradable properties. Transesterification of Helianthus annuus (sunflower) seeds oil is one methodsacci producing fuel. However, during this process, impurities are frequently found synthesized which degrades quality biodiesel. Therefore, proper catalyst required obtain high-quality In study, series aminated polyethersulfone (PES- $$\mathrm{NH}_2$$ ) membranes was...

Highly dispersed platinum (Pt) nanoparticles / multiwalled carbon nanotubes (MWCNTs) on bacterial cellulose (BC) as anode catalysts for proton exchange membrane fuel cells (PEMFC) were prepared with various precursors and their electro-catalytic activities towards hydrogen oxidation at 70 oC under non-humidified conditions. The composite was by deposition of Pt MWCNTs BC gel impregnation method using a water solution metal followed reducing reaction gas. characterized TEM (transmission...

Polyvinylideneflouride (PVDF) is a good polymeric material for preparing ultrafiltration and microfiltration membranes due to its high mechanical properties chemical resistance. The objective of this work study the effects PVDF concentration on membrane such as strength, permeability water permselectivity T-500 T-2000 dextran solutions. These were also characterized by contact angle determination morphology was observed scanning electron microscopy (SEM). From experimental data, it can be...

Synthesis of acid-base complex membrane is one method to improve the proton conductivity in exchange for fuel cell applications. In this study, was synthesized based on N-succinylchitosan-chitosan complexes. The N-succinylchitosan blended with chitosan acetic acid at various substitution degree weight ratio 80% w/w. membranes were cast from polymer solution and dried by evaporation. properties such as water uptake, ion capacity, conductivity, mechanical strength analyzed. It observed that...

This research aims to calculate energetics parameters, hydrogen bonding, characteristics local hydration, and proton transfer in phosphorylated nata de coco (NDCF) membrane using ab initio method. The minimum energy structure of NDCF membranes the addition n water molecules (n = 1-10) determined at B3LYP/6-311G** level indicates that dissociation requires a four molecules. Dissociated protons stabilize with formation (hydronium, Zundel, Eigen) ions. Calculation interaction an increasingly...

A polymer electrolyte membrane widely used in PEMFCs and DMFCs is a perfluorosulfonated (the Nafion membrane).This material exhibits good chemical stability proton conductivity, but it very expensive difficult to recycle.There high methanol crossover that causes decrease efficiency performance of the fuel cell, so with low needed as substitute for membrane.One materials can be polyblends from sulfonated polystyrene-lignosulfonate (SPS-LS).Such were prepared by casting solution characterized...

A modification of carrageenan with acrylamide has been successfully done using microwave-assisted grafting copolymeration method. The kappa-carrageenan-graft-acrylamide (κC-g-AAm) copolymer was synthesized potassium persulfate (KPS) as initiator and varied microwave power. Copolymer the optimum percentage (%G) intrinsic viscosity obtained at 70% power under 20 s exposure time. Characterization copolymers for enhanced oil recovery application by dynamic rheological measurement. measurement...

Renewable materials derived from vegetable oils are now widely developed for obtaining green polymers. One of the applications those polymers is in field Enhanced Oil Recovery (EOR) where put injection wells to increase water viscosity resulting higher efficiency oil production. Indonesia very rich crude palm and therefore, it was chosen as starting material polymer synthesis. The objective this work prepare monomer first, by doing olefin metathesis reaction between FAME (fatty acid methyl...