Effect of PE-g-MA compatibilizer on the structure and performance of HDPE/EVA blend membranes fabricated via TIPS method

Shokri, Elham; Yegani, Reza; Heidari, Setareh; Shoeyb, Zahra

doi:10.1016/j.cherd.2015.05.025

Cited by 43 publications

(10 citation statements)

References 35 publications

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“…Besides, this behavior may be attributed to an increase in the membrane porosity. As we reported in our previous study, 21,43 in lower weight fractions of EVA (less than 15 wt%), decreasing the crystalline sections leads to an increase in the porosity, bearing in mind that EVA has lower crystallinity than that of HDPE 43 . The increase in the membrane porosity provides evidence that water molecules can pass through the membrane resulting in an increase in the flux of the membrane.…”

Section: Resultssupporting

confidence: 71%

A comprehensive analysis of membrane fouling in microfiltration of complex linear macromolecules based on theoretical modeling and FESEM images

Heidari

Etemadi

Yegani

2020

J of Chemical Tech & Biotech

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BACKGROUNDMembrane technology is an attractive alternative to conventional water/wastewater treatment technologies as it is sustainable and can be used as an independent process as well as being a part of integrated systems with other treatment technologies. Notwithstanding the abundant benefits that membrane‐based systems offer, their commercial application is overshadowed by the ubiquitous fouling. However, accurate prediction and identification of membrane fouling mechanisms can help to open new doors in recognition of appropriate arrangements for developing more effective membrane synthesis methods and fundamental strategies to achieve better performance, especially in large‐scale production.RESULTSIn this study, three fouling models, namely resistance‐in‐series (RIS), Hermia's and combined cake filtration–pore blockage models, were applied to precisely analyze fouling behavior in dead‐end microfiltration (MF) of collagen solution, as model foulant, using pure high‐density polyethylene and modified high‐density polyethylene membranes. The RIS model was shown to be not representative of the real fouling mechanism in MF membrane units. Similarly, none of the classical models were able to accurately predict fouling in the entire MF process. However, the combined cake–intermediate blockage model provided excellent fits for the membranes.CONCLUSIONSObtained results also demonstrated that physical cleaning was not enough for organic fouling elimination in MF processes. Finally, computational results were validated with experimental observations of collagen rejection and field emission scanning electron microscopy analyses as well. © 2020 Society of Chemical Industry

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Section: Resultssupporting

confidence: 71%

A comprehensive analysis of membrane fouling in microfiltration of complex linear macromolecules based on theoretical modeling and FESEM images

Heidari

Etemadi

Yegani

2020

J of Chemical Tech & Biotech

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“…The intensity of both the peaks (2850 and 2910 cm -1 ) decreased with an increase of graphene-like content and the decrease of ethylene groups. The lower intensity confirms the bulk value of the graphene-like filler in the membrane of the polymer has increased [50,52,53].…”

Section: Ft-ir Resultsmentioning

confidence: 63%

“…The FTIR spectra of the graphene containing composites showed the same absorption bands than the neat polymers (LDPE and EVA). EVA spectrum exhibited two sharp peaks at 1720-1745 cm -1 and 1100-1200 cm -1 , which are attributed to the stretching vibration of C=O and C ̶ O bonds, respectively [3,50,51]. The FT-IR spectra revealed two intensive peaks at 2850 and 2910 cm -1 for all samples, which are assigned to the ethylene groups existing in both the LDPE and EVA components.…”

Section: Ft-ir Resultsmentioning

confidence: 99%

Electrical, thermal and rheological properties of low-density polyethylene/ethylene vinyl acetate/graphene-like composite

Azizi

Ouellet-Plamondon

Nguyen‐Tri

et al. 2019

Composites Part B: Engineering

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Composites of low-density polyethylene (LDPE), ethylene vinyl acetate (EVA), and a graphene-like material were explored for their electrical properties for use in high-volume lowcost conductive applications. A graphene-like material, obtained from hybrid clay-sucrose carbonization, was investigated as an alternative filler with advantages over conventional graphene technology. The electrical properties of the composites as synthesized by the solvent-casting technique were studied using broadband dielectric spectroscopy. The percolation threshold was identified for both as synthesized and annealed composite samples. Due to charge transport and electrode polarization, the sub-percolating composites exhibited low frequency dispersion particularly at elevated temperatures. Composites of LDPE/EVA/graphene-like above the percolation threshold exhibited a higher rheological storage modulus and thermal stability which indicates an alignment between the electrical, thermal and rheological properties.

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“…27,28 The solvent factor also determines the performance of HDPE membranes. Shokri et al 29 reported that HDPE had poor compatibility with several types of solvents and additives, which would impact the performance of the resulting membrane.…”

Section: Introductionmentioning

confidence: 99%

Performance of a membrane fabricated from high-density polyethylene waste for dye separation in water

et al. 2023

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Effect of PE-g-MA compatibilizer on the structure and performance of HDPE/EVA blend membranes fabricated via TIPS method

Cited by 43 publications

References 35 publications

A comprehensive analysis of membrane fouling in microfiltration of complex linear macromolecules based on theoretical modeling and FESEM images

A comprehensive analysis of membrane fouling in microfiltration of complex linear macromolecules based on theoretical modeling and FESEM images

Electrical, thermal and rheological properties of low-density polyethylene/ethylene vinyl acetate/graphene-like composite

Performance of a membrane fabricated from high-density polyethylene waste for dye separation in water

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