Cellulose Acetate Reverse Osmosis Membranes Made by Phase Inversion Method: Effects of a Shear Treatment Applied to the Casting Solution on the Membrane Structure and Performance

Nolte, Mathias C. M.; Simon, Peter F. W.; Toro, M. Aguiar del; Gerstandt, Karen; Calmano, Wolfgang

doi:10.1080/01496395.2010.521231

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…The Cellulose Acetate (CA) used in this study was made from cotton-based cellulose. Referring to literature (Rao and Diwan 1997;Al-Ahmed et al 2004;Son et al 2004;Heinze and Liebert 2004;Meier et al 2004;Saljoughi et al 2009;Zavastin et al 2010;Medina-Gonzalez et al 2011;Nolte et al 2011), different approaches for cellulose acetate solution and membrane preparation have been investigated, considering different types of solvent, substrate, as well as different casting and solvent evaporation methods. A 20% w/w solution of Cellulose Acetate (CA) in ethyl lactate (C 98% purity, purchased from Sigma-Aldrich) was prepared by gradually adding the CA powder to the solvent.…”

Section: Material Experimental Measurements and Analytical Modelmentioning

confidence: 99%

Moisture absorption measurement and modelling of a cellulose acetate

2021

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With a view toward the application of highly hygroscopic polymers as a humidity responsive self-actuator, the evaluation of the real time moisture concentration in the material becomes a priority. In this paper, the moisture diffusion process in a cellulose acetate (53.3% of acetylation) has been studied. Membranes of cellulose acetate (thickness within the range 66–200 µm) have been prepared, and the moisture absorption at room temperature and at a different relative humidity (RH within the range 21–53%) has been monitored. An analytical model has been used to describe the observed non-Fickian sigmoidal behavior of moisture diffusion. A relaxation factor (β) of about 0.026 s−1 and a moisture diffusion coefficient (D) of 3.35 × 10–6 mm2/s have been determined. At constant room temperature, the moisture concentration at saturation (Csat) has shown a linear relation with relative humidity. The identified values β, D and Csat of the analytical model have been used as input for the finite element simulation of the non-Fickian diffusion. The reliability of the finite element simulations has been confirmed with a second set of experiments.

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Section: Material Experimental Measurements and Analytical Modelmentioning

confidence: 99%

Moisture absorption measurement and modelling of a cellulose acetate

2021

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“…The CA membrane was made by using phase inversion method (Nolte et al, 2011). Membrane printing solutions consist of CA membranes with varying concentration of 10, 12, 14, 16 and 18 wt% with CA mass needed are 1.1, 1.4, 1.6, 1.9 and 2.2 g, respectively.…”

Section: Methodsmentioning

confidence: 99%

Determination of Glucose with Cellulose Acetate/Glucose Oxidase Modified Carbon Paste Electrodes

Sanjaya

Sukmawati

Ismillayli

et al. 2021

Molekul

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An amperometric biosensor for glucose determination was developed using a carbon paste electrode (CPE) modified with cellulose acetate (CA)/glucose oxidase (GOx) bilayer membrane through the electrostatic interaction between them. The CA membrane was used as matrix for enzyme immobilization via microencapsulation technique, is enzyme placed between two membranes. CA/GOx membrane was attached to CPE surface containing ferrocene (Fc). By using proposed amperometric biosensor, glucose concentration was determined as well as its characteristic. The modified Fc–graphite electrode with CA/GOx bilayer membrane for glucose had optimum measurement conditions at work emf of 874 mV, CA concentration of 10% and amount Fc of 0.021 mg. The biosensor showed good performance at glucose concentration range of 0.05–3 mM and limit of detection was 0.024 mM. Proposed biosensor has good reproducibility with relative standard deviation (RSD) was less than 5% up to 7 times use (in the defined condition 4 ˚C). Glucose measurement result in human serum of diabetes mellitus patients showed conformity with result of reference method, MediSense Optium glucose test kit.

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“…Its properties are more sensitive to the effects of pressure than membranes made by a 3-stage process involving heat treatment. Nolte et al [293], dissolved a mixture of equal parts of cellulose diacetate and cellulose triacetate in di-propylene glycol and exposed them to shear stresses of different intensities. The asymmetric films of RO were prepared from these materials by dispersive conversion.…”

Section: High Performance Membranesmentioning

confidence: 99%

A Review on Promising Membrane Technology Approaches for Heavy Metal Removal from Water and Wastewater to Solve Water Crisis

Batouti

Al‐Harby

Elewa

2021

Water

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Due to the impacts of water scarcity, the world is looking at all possible solutions for decreasing the over-exploitation of finite freshwater resources. Wastewater is one of the most reliable and accessible water supplies. As the population expands, so do industrial, agricultural, and household operations in order to meet man’s enormous demands. These operations generate huge amounts of wastewater, which may be recovered and used for a variety of reasons. Conventional wastewater treatment techniques have had some success in treating effluents for discharge throughout the years. However, advances in wastewater treatment techniques are required to make treated wastewater suitable for industrial, agricultural, and household use. Diverse techniques for removing heavy metal ions from various water and wastewater sources have been described. These treatments can be categorized as adsorption, membrane, chemical, or electric. Membrane technology has been developed as a popular alternative for recovering and reusing water from various water and wastewater sources. This study integrates useful membrane technology techniques for water and wastewater treatment containing heavy metals, with the objective of establishing a low-cost, high-efficiency method as well as ideal production conditions: low-cost, high-efficiency selective membranes, and maximum flexibility and selectivity. Future studies should concentrate on eco-friendly, cost-effective, and long-term materials and procedures.

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Cellulose Acetate Reverse Osmosis Membranes Made by Phase Inversion Method: Effects of a Shear Treatment Applied to the Casting Solution on the Membrane Structure and Performance

Cited by 6 publications

References 33 publications

Moisture absorption measurement and modelling of a cellulose acetate

Moisture absorption measurement and modelling of a cellulose acetate

Determination of Glucose with Cellulose Acetate/Glucose Oxidase Modified Carbon Paste Electrodes

A Review on Promising Membrane Technology Approaches for Heavy Metal Removal from Water and Wastewater to Solve Water Crisis

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