scholarly journals Fabrication and Characterization of Nano Hybrid Cellulose Acetate-nanoTiO2/crosslinked Polyvinyl Alcohol Coated Membrane for Crude Clove Oil Purification

2019 ◽  
Vol 64 (3) ◽  
pp. 304-319
Author(s):  
Tutuk Djoko Kusworo ◽  
Widayat Widayat ◽  
Dani Puji Utomo
Keyword(s):  
Polyvinyl Alcohol ◽  
Cellulose Acetate ◽  
Membrane Surface ◽  
Polymer Concentration ◽  
Nano Particles ◽  
Inversion Method ◽  
Cellulose Acetate Membrane ◽  
Clove Oil ◽  
Oil Purification ◽  
Coated Membrane

The application of membranes for clove oil purification has the potential to improve the efficiency and effectiveness of processing. The main problem that occurs is the polymer-based membranes tend to change in properties such as weakening, dissolving, and swelling when contact with clove oil. In this study, cellulose acetate membrane was developed with TiO2 nano-particles to reduce swelling effect and coating with polyvinyl alcohol (PVA) to modify membrane surface. The membranes were prepared using dry-wet phase inversion method from dope solution with polymer concentration of 14–20 wt% and nano-particles of TiO2 with a concentration of 0–1.5 wt% in total solid. The formed membrane was coated with PVA with a concentration of 2–5 wt% crosslinked using glutaraldehyde. The SEM results show that prepared membrane are asymmetric membranes and show the coated layer of PVA on the surface. The FTIR spectra confirm that the PVA is successfully crosslinked and the addition of nano-particles TiO2 decreases the membrane swelling degree, significantly. In the addition of 0.5 wt% of nano-TiO2 can increase the flux from 0.54 to 0.66 L × m−2 × h−1 × bar−1. The coated membrane surface using PVA increases the selectivity of the membrane to produce clove oil permeates with eugenol content of 82.5 % from 68 %.

COMPARATIVE ASSESSMENT OF CHLORPHENIRAMINE MALEATE PERMEATION THROUGH CELLULOSE ACETATE MEMBRANE AND SHEEP NASAL MUCOSA

INDIAN DRUGS ◽  
2014 ◽  
Vol 51 (04) ◽  
pp. 42-49
Author(s):  
M. I Mouzam ◽  
◽  
M. H. G. Dehghan
Keyword(s):  
Cellulose Acetate ◽  
Nasal Mucosa ◽  
Polymer Concentration ◽  
Research Work ◽  
Permeation Rate ◽  
Cellulose Acetate Membrane ◽  
Chlorpheniramine Maleate ◽  
Drug Permeation ◽  
Dispersion Media ◽  
The Impact

The present research work was aimed to develop nasal mucoadhesive microspheres of chlorpheniramine maleate (CPM) & to compare its permeation rate through sheep nasal mucosa and cellulose acetate membrane. The impact of different concentrations of polymer and the dispersion media were evaluated for drug permeation, mucoadhesion, FT-IR and DSC studies. With the increase in polymer concentration, it was observed that the particle size and wall thickness of the microsphere increased; while the in-vitro drug permeation through sheep nasal mucosa significantly decreased when the volume of dispersion media was increased. Histopathological studies show the absence of epithelial cilia destruction. The permeation rate through sheep nasal mucosa was found to be 7.968 µg/hr/cm2, while through cellulose acetate (artificial) membrane showed 8.572 μg/hr/cm2. In conclusion, our results indicate that CPM released from chitosan microspheres penetrate well through sheep nasal mucosa, indicating suitability for nasal administration.

scholarly journals Preparation and Characterization of TiO2-PVDF/PMMA Blend Membranes Using an Alternative Non-Toxic Solvent for UF/MF and Photocatalytic Application

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 724 ◽  
Author(s):  
Ouassila Benhabiles ◽  
Francesco Galiano ◽  
Tiziana Marino ◽  
Hacene Mahmoudi ◽  
Hakim Lounici ◽  
...  
Keyword(s):  
Phase Separation ◽  
Vinylidene Fluoride ◽  
Membrane Surface ◽  
Polymer Concentration ◽  
Inversion Method ◽  
Membrane Morphology ◽  
Photocatalytic Application ◽  
Poly Vinylidene Fluoride ◽  
Dope Solution ◽  
Phase Inversion Method

The approach of the present work is based on the use of poly (methylmethacrylate) (PMMA) polymer, which is compatible with PVDF and TiO2 nanoparticles in casting solutions, for the preparation of nano-composites membranes using a safer and more compatible solvent. TiO2 embedded poly (vinylidene fluoride) (PVDF)/PMMA photocatalytic membranes were prepared by phase inversion method. A non-solvent induced phase separation (NIPS) coupled with vapor induced phase separation (VIPS) was used to fabricate flat-sheet membranes using a dope solution consisting of PMMA, PVDF, TiO2, and triethyl phosphate (TEP) as an alternative non-toxic solvent. Membrane morphology was examined by scanning electron microscopy (SEM). Backscatter electron detector (BSD) mapping was used to monitor the inter-dispersion of TiO2 in the membrane surface and matrix. The effects of polymer concentration, evaporation time, additives and catalyst amount on the membrane morphology and properties were investigated. Tests on photocatalytic degradation of methylene blue (MB) were also carried out using the membranes entrapped with different concentrations of TiO2. The results of this study showed that nearly 99% MB removal can be easily achieved by photocatalysis using TiO2 immobilized on the membrane matrix. Moreover, it was observed that the quantity of TiO2 plays a significant role in the dye removal.

scholarly journals Crown Ether-Immobilized Cellulose Acetate Membranes for the Retention of Gd (III)

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3978
Author(s):  
Oana Steluta Serbanescu ◽  
Andreea Madalina Pandele ◽  
Madalina Oprea ◽  
Augustin Semenescu ◽  
Vijay Kumar Thakur ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Photoelectron Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Separation Efficiency ◽  
Membrane Surface ◽  
Nitrate Solution ◽  
Cellulose Acetate Membrane ◽  
Retention Performance ◽  
Easy Method ◽  
Cellulose Acetate Membranes

This study presents a new, revolutionary, and easy method of separating Gd (III). For this purpose, a cellulose acetate membrane surface was modified in three steps, as follows: firstly, with aminopropyl triethoxysylene; then with glutaraldehyde; and at the end, by immobilization of crown ethers. The obtained membranes were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), through which the synthesis of membranes with Gd (III) separation properties is demonstrated. In addition, for the Gd (III) separating process, a gadolinium nitrate solution, with applications of moderator poison in nuclear reactors, was used. The membranes retention performance has been demonstrated by inductively coupled plasma mass spectrometry (ICP-MS), showing a separation efficiency of up to 91%, compared with the initial feed solution.

scholarly journals Pengolahan Air Limbah Menjadi Air Minum Dengan Menghilangkan Amonium Dan Bakteri E-Coli Melalui Membran Nanofiltrasi

2018 ◽  
Vol 1 (1) ◽  
pp. 6
Author(s):  
Malikhatul Hidayah
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Cellulose Acetate ◽  
Solid Phase ◽  
Inversion Method ◽  
Cellulose Acetate Membrane ◽  
Cellulose Acetate Membranes ◽  
Treatment Research ◽  
Non Fouling

<p><em>Industrial waste water area that flows in the River Flood Canal Semarang can affect the environment if not done processing. Membrane is one alternative water treatment technologies with the principle of filtration. The presence of fouling is a problem encountered in the use of the membrane. In this study will be made of non-fouling nanofiltration membranes made from cellulose acetate. Manufacture of cellulose acetate membrane is accomplished by phase inversion method, which is changing the shape of the polymer solid phase into the liquid phase rich in solvent into solids (membrane) which is rich in polymer. Therefore, the aim of this study was to create a non-fouling nanofiltration membrane using cellulose acetate polymer as well as assess the effect of PEG additives and pre-treatment with UV light to the surface of the structure and performance of cellulose acetate membranes for produced water treatment. Research using cellulose acetate membranes for wastewater treatment is done by varying the type of PEG 1500 and 4000, variations of PEG of 1, 3 and 5% by weight and a UV irradiation for 10, 20 and 30 seconds. The research followed by testing the performance of the membrane in wastewater treatment using a dead-end filtration with the parameters of flux and rejection. Characterization of the membrane was analyzed with SEM and FTIR. Analysis of the results was conducted to determine the levels of turbidity, TDS, COD, Ca<sup>2+</sup>, S<sup>2-</sup> and oil in waste water before and after passing through the membrane.</em><em></em></p>

scholarly journals Preparation and Characterization of 18-Crown-6 Modified Cellulose Acetate Membrane in Uni-Univalent Aqueous Electrolyte Solutions

2021 ◽  
Vol 33 (6) ◽  
pp. 1229-1235
Author(s):  
A.K. Tiwari ◽  
A. Abrar ◽  
Preeti
Keyword(s):  
Cellulose Acetate ◽  
Water Activity ◽  
Electrolyte Concentration ◽  
Membrane Surface ◽  
Electrolyte Solutions ◽  
Sem Analysis ◽  
Present System ◽  
Cellulose Acetate Membrane ◽  
Time Data ◽  
Physico Chemical

In present study, a cellulose acetate/18-crown-6 blend membrane (selective for K+ ions) was prepared by the solvent vapourization method. The surface morphology of the modified membrane was characterized by scanning electron microscopy (SEM) analysis, which indicate the smooth and homogeneous membrane surface. The effect of water and electrolyte (KCl and NaCl) concentration on the rate of water sorption and porosity was explained on the basis of physico-chemical parameters i.e. water content and water activity of the membrane phase. The variation of ionic transport number with respect to water activity, i.e. [dtmK+/dam w > dtmNa+/dam w] has been observed in the present system. The transport of ions under concentration gradient in term of permeability, flow and flux was estimated by membrane/solution conductance-time data. The variations of permeability, flux and flow values with respect to time for K+ and Na+ ions were found to be different. Membrane water activity (am w) decreases with the increase of external electrolyte concentration. The effective fixed charge density of the membrane increases with increase of external electrolyte concentration. Permselectivity parameter of the membrane in both cases decline with increase of external electrolyte concentration.

scholarly journals WASTEWATER TREATMENT USING A MODIFIED CELLULOSE ACETATE MEMBRANE

2021 ◽  
Vol 55 (5-6) ◽  
pp. 697-704
Author(s):  
HANANE ABURIDEH ◽  
ZAHIA TIGRINE ◽  
DJAMILA ZIOUI ◽  
SARAH HOUT ◽  
DJILALI TASSALIT ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Cellulose Acetate ◽  
Phase Inversion ◽  
Morphological Structure ◽  
Polymeric Membranes ◽  
Inversion Method ◽  
Cellulose Acetate Membrane ◽  
And Performance ◽  
Phase Inversion Method ◽  
Modified Cellulose

The main objective of this work has been to study the performance of membranes developed for treating purified wastewater. Polymeric membranes have been developed from solutions containing cellulose acetate (AC) and polysulfone (PSF), using N,N-dimethylformamide (DMF) as solvent and polyethylene glycol (PEG) as additive. The phase inversion method was chosen as a technique for producing the membrane films. The incorporation of PEG allowed us to study the effect of the additive on the morphological structure, and to predict the performance of the membranes formed. Examining the flux, permeability and selectivity of the membranes allowed studying the efficiency and performance of each membrane. The application results achieved in wastewater treatment at Chenoua/TIPAZA station were very satisfactory and in accordance with the standards required by WHO. The optimal performance, in terms of permeability and selectivity, was obtained for the MC membrane with the composition: PSF/PEG/AC of 25/12/63.

Study on Heparin-Like Surface Based on Nanofibrous Membrane of Cellulose Acetate and its Blood Compatibility

2012 ◽  
Vol 159 ◽  
pp. 317-321 ◽  
Author(s):  
Ping Lan ◽  
Wei Wang ◽  
Jian Da Cao
Keyword(s):  
Cellulose Acetate ◽  
Anticoagulant Activity ◽  
Membrane Surface ◽  
Water Soluble ◽  
Nanofibrous Membrane ◽  
Membrane Properties ◽  
Degree Of Hydrolysis ◽  
Research Approach ◽  
Cellulose Acetate Membrane ◽  
Cellulose Acetate Membranes

Heparin-like anticoagulant materials have been intensively studied over the past several years, many of effective works focus on the preparation of homogeneous sulfonated polymer and further anticoagulation and filtration properties.1 Due to high water-soluble properties of homogeneous materials, its applied scope is limited. In this study, nanofibrous membrane of cellulose acetate is chosen. By controlling degree of hydrolysis on the membrane surface and its further surface sulfonation, heparin-like surface has been built on cellulose derivative membranes where there are plenty of sulfonic acid group. In this paper, some testing means such as surface contact angle, ATR-FTIR, XPS and platelet adhesion are used to characterize membrane properties. The results show that our research approach is feasible, effects of hydrolysis and sulfonation are obvious on cellulose acetate membranes. In the meantime, the surface hydrophilicity of membrane is increased significantly; In addition, patelet adhesion experiments show that platelets adsorption decrease obviously after heparin-like treatment on the cellulose acetate membrane, showing an excellent anticoagulant activity.

Preparation of Polyethersulfone Ultrafiltration Membrane Surface Coated with TiO2 Nanoparticles and Irradiated under UV Light

2013 ◽  
Vol 594-595 ◽  
pp. 877-881 ◽  
Author(s):  
Siti Hawa Mohamad ◽  
M.I. Idris ◽  
Hasan Zuhudi Abdullah
Keyword(s):  
Humic Acid ◽  
Uv Light ◽  
Membrane Surface ◽  
Pure Water ◽  
Water Flux ◽  
Dip Coating ◽  
Ultrafiltration Membrane ◽  
Inversion Method ◽  
Pes Membrane ◽  
Coated Membrane

This paper focuses on performance of polyethersulfone (PES) ultrafiltration membrane coated with titanium dioxide (TiO2) nanoparticles and irradiated with UV light. The flat sheet membrane was prepared via phase inversion method, with two types of membrane; TiO2 coated PES membrane and UV irradiated TiO2 coated PES membrane. TiO2 suspension with concentration of 0.01, 0.03 and 0.05 wt.% were prepared and coated on the PES surface via dip coating. Membrane was immersed in all suspension for 15 minutes and 30 minutes. Then, prepared coated membranes were irradiated by 184 Watts UV lamp for 15 minutes. The performance of membranes was examined by permeation of humic acid. The morphology of membranes was analyzed by scanning electron microscopy (SEM). It was revealed that the pure water flux and humic acid permeation of UV irradiated TiO2 coated membrane was higher than TiO2 coated membrane. It can be concluded that TiO2 coated with 0.03 wt.% of suspension, 30 minutes and 15 minutes UV irradiation with 184 Watt light were determined as the optimum conditions for preparation ultrafiltration PES membrane.

scholarly journals Synthesis and Characterization of Cellulose Acetate Membranes with Self-Indicating Properties by Changing the Membrane Surface Color for Separation of Gd(III)

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 468 ◽  
Author(s):  
Oana Steluta Serbanescu ◽  
Andreea Madalina Pandele ◽  
Florin Miculescu ◽  
Stefan Ioan Voicu
Keyword(s):  
Cellulose Acetate ◽  
Photoelectron Spectroscopy ◽  
Membrane Surface ◽  
Feed Solution ◽  
Separation Process ◽  
Process Efficiency ◽  
Cellulose Acetate Membrane ◽  
Easy Method ◽  
Gadolinium Nitrate ◽  
Cellulose Acetate Membranes

This study presents a new, revolutionary, and easy method for evaluating the separation process through a membrane that is based on changing the color of the membrane surface during the separation process. For this purpose, a cellulose acetate membrane surface was modified in several steps: initially with amino propyl triethoxysilane, followed by glutaraldehyde reaction and calmagite immobilization. Calmagite was chosen for its dual role as a molecule that will complex and retain Gd(III) and also as an indicator for Gd(III). At the contact with the membrane surface, calmagite will actively complex and retain Gd(III), and it will change the color of the membrane surface during the complexation process, showing that the separation occurred. The synthesized materials were characterized by Fourier transform infrared spectroscopy (FT-IR), thermal analysis (TGA-DTA), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy, demonstrating the synthesis of membrane material with self-indicating properties. In addition, in the separation of the Gd(III) process, in which a solution of gadolinium nitrate was used as a source and as a moderator in nuclear reactors, the membrane changed its color from blue to pink. The membrane performances were tested by Induced Coupled Plasma–Mass Spectrometry (ICP-MS) analyses showing a separation process efficiency of 86% relative to the initial feed solution.

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