The Permeability and Mechanical Properties of Cellulose Acetate Membranes Blended with Polyethylene glycol 600 for Treatment of Municipal Sewage

Bai, Haolong; Zhou, Yitong; Wang, Xuan; Zhang, Liping

doi:10.1016/j.proenv.2012.10.049

Cited by 42 publications

(20 citation statements)

References 9 publications

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“…Furthermore, we also note that the elongation at break decreases for membranes E, F, G, having a low PSf/PEG ratio and a higher concentration of acetate cellulose. A similar behavior was observed by Bai et al 54 for membranes prepared from cellulose acetate and PEG 600. They explained that this is due to the intrinsic phase equilibrium relationship of the solution, which has been modified by adding PEG.…”

Section: Mechanical Resistancesupporting

confidence: 87%

“…Several studies have shown that cellulose acetate has very low mechanical properties, a tensile index of the order of 31 Mpa and an elongation that does not exceed 13%. 54 Considering this, we introduced the polysulfone, which has very high mechanical strength in order to improve the mechanical behavior of the membranes prepared from cellulose acetate. 55 Figure 7 illustrates the effect of the membrane composition on the mechanical properties.…”

Section: Mechanical Resistancementioning

confidence: 99%

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Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

Aburideh¹,

Merzouk²,

Naceur³

et al. 2019

Cellulose Chem. Technol.

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The performance of a membrane is a key factor in predicting its reliability. Designing membranes depends on their morphological and molecular characteristics for specific applications. This work focuses on improving the behavior of a cellulose acetate-polysulfone PSf-CA membrane in the presence of PEG 400 additive, in different concentrations, using thermal annealing on the surface of the membrane. The membrane was prepared by the NIPS phase inversion process; the surfaces of the obtained membrane films were subjected to thermal annealing at 75 °C for 15 seconds. The influence of the composition of the polymer mixture, the concentration of the additive and the annealing effect on the performance of the membranes were studied. The membranes were characterized in terms of contact angle and mechanical resistance, as well as by FTIR, DSC, ATG and SEM. Measurements of the contact angle confirmed the hydrophilic character, which increased with a rising level of PEG in the casting solution. The results showed that the permeation flux increased for the highest PSf/PEG ratio. SEM results suggested that the annealing treatment improved the surface of the membrane; the surface layers became denser and smoother, with a porous intermediate layer, as CA concentrations rose in the mixture. The fluoride reject was evaluated for all the membranes, the obtained fluoride retention rates were very satisfactory and met the standards required by WHO.

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Section: Mechanical Resistancesupporting

confidence: 87%

Section: Mechanical Resistancementioning

confidence: 99%

Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

Aburideh¹,

Merzouk²,

Naceur³

et al. 2019

Cellulose Chem. Technol.

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“…Polymer membranes must have the necessary mechanical properties to withstand the pressure gradient which acts as a driving force for the separation process [ 35 ]. Symmetrical or dense membranes have better mechanical properties when compared with asymmetric membranes.…”

Section: Resultsmentioning

confidence: 99%

“…Asymmetrical membranes generally have a skin layer and large cavities which deteriorate the mechanical strength of the membrane. However, symmetrical membranes are compact, do not have fingerlike voids, and provide good mechanical properties [ 35 ]. Both developed and commercial membranes were tested to compare their mechanical properties and the average results are presented in Table 3 and Figure 5 .…”

Section: Resultsmentioning

confidence: 99%

Development of Polymeric Membranes for Oil/Water Separation

Hussain

Al-Yaari

2021

Membranes

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In this work, the treatment of oily wastewater was investigated using developed cellulose acetate (CA) membranes blended with Nylon 66. Membrane characterization and permeation results in terms of oil rejection and flux were compared with a commercial CA membrane. The solution casting method was used to fabricate membranes composed of CA and Nylon 66. Scanning Electron Microscopy (SEM) analysis was done to examine the surface morphology of the membrane as well as the influence of solvent on the overall structure of the developed membranes. Mechanical and thermal properties of developed blended membranes and a commercial membrane were examined by thermogravimetric analysis (TGA) and universal (tensile) testing machine (UTM). Membrane characterizations revealed that the thermal and mechanical properties of the fabricated blended membranes better than those of the commercial membrane. Membrane fluxes and rejection of oil as a function of Nylon 66 compositions and transmembrane pressure were measured. Experimental results revealed that the synthetic membrane (composed of 2% Nylon 66 and Dimethyl Sulfoxide (DMSO) as a solvent) gave a permeate flux of 33 L/m2h and an oil rejection of around 90%, whereas the commercial membrane showed a permeate flux of 22 L/m2h and an oil rejection of 70%.

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“…According to which charges present on the membrane generate Columbic forces leading to exclusion of ions . However, CS–PEG E showed a decline in salt rejection due to the fact that fouling effects salt rejection capacity of membranes …”

Section: Resultsmentioning

confidence: 99%

Synthesis and investigation of desalinating, antibacterial, and mechanical properties of tetraethylorthosilicate crosslinked chitosan/polyethylene glycol (PEG‐300) membranes for reverse osmosis

Raza

Kayani

Sabir³

et al. 2019

J of Applied Polymer Sci

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Solution casting method was used to synthesize chitosan (CS)-based membranes for reverse osmosis (RO) using PEG-300 and tetraethylorthosilicate as a crosslinker. Their salt rejection (%) and permeate flux (mL/h.m 2 ) was measured by using lab scale RO plant. FTIR spectroscopy reveals interactions between CS and PEG by shifting of OH peak from 3237 cm −1 to lower wavenumber in modified membranes. SEM results showed pores in modified membranes while pure CS membranes had uniform nonporous and dense microstructure. DMA results demonstrated that the addition of PEG lowers the T g value up to 6.5%. Water content of membranes increases up to 82.63% as the amount of PEG increases owing to its hydrophilic nature. The bacterial killing ability showed that the modified membranes possess good antibacterial activity against Escherichia coli in comparison to the control film. The permeation results revealed that salt rejection and flux of the modified membranes increased up 60% and 86.36 mL/h.m 2 , respectively.

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The Permeability and Mechanical Properties of Cellulose Acetate Membranes Blended with Polyethylene glycol 600 for Treatment of Municipal Sewage

Cited by 42 publications

References 9 publications

Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

Development of Polymeric Membranes for Oil/Water Separation

Synthesis and investigation of desalinating, antibacterial, and mechanical properties of tetraethylorthosilicate crosslinked chitosan/polyethylene glycol (PEG‐300) membranes for reverse osmosis

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