PVDF based Nanocomposite Membranes: Application towards Wastewater treatment

Salim, Nida; Siddiqa, Asima; Shahida, Shabnam; Qaisar, Sara

doi:10.18689/mjnn-1000128

Cited by 8 publications

(5 citation statements)

References 56 publications

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“…The mean pore sizes of the membranes range from 19.6 ± 0.9 to 21.7 ± 0.9 nm, which is included in the pore size range of UF membranes. 78 Mean pore size decreased with the incorporation of HNT into the membranes. The lower mean pore size of the PAN-HNT-1 membrane compared to other membranes can be explained by the fact that high amounts of HNT cause blockage in the pores of the membrane.…”

Section: Resultsmentioning

confidence: 96%

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Halloysite Nanotube-Enhanced Polyacrylonitrile Ultrafiltration Membranes: Fabrication, Characterization, and Performance Evaluation

Acarer,

Pir,

Tüfekci

et al. 2023

ACS Omega

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This research focuses on the production and characterization of pristine polyacrylonitrile (PAN) as well as halloysite nanotube (HNT)-doped PAN ultrafiltration (UF) membranes via the phase inversion technique. Membranes containing 0.1, 0.5, and 1% wt HNT in 16% wt PAN are fabricated, and their chemical compositions are examined using Fourier transform infrared (FTIR) spectroscopy. Scanning electron microscopy (SEM) is utilized to characterize the membranes’ surface and cross-sectional morphologies. Atomic force microscopy (AFM) is employed to assess the roughness of the PAN/HNT membrane. Thermal characterization is conducted using thermal gravimetric analysis (TGA) and differential thermal analysis (DTA), while contact angle and water content measurements reveal the hydrophilic/hydrophobic properties. The pure water flux (PWF) performance of the porous UF water filtration membranes is evaluated at 3 bar, with porosity and mean pore size calculations. The iron (Fe), manganese (Mn), and total organic carbon (TOC) removal efficiencies of PAN/HNT membranes from dam water are examined, and the surfaces of fouled membranes are investigated by using SEM post-treatment. Mechanical characterization encompasses tensile testing, the Mori–Tanaka homogenization approach, and finite element analysis. The findings offer valuable insights into the impact of HNT doping on PAN membrane characteristics and performance, which will inform future membrane development initiatives.

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Section: Resultsmentioning

confidence: 96%

“…The mean pore sizes of the membranes range from 19.6 ± 0.9 to 21.7 ± 0.9 nm, which is included in the pore size range of UF membranes . Mean pore size decreased with the incorporation of HNT into the membranes.…”

Section: Resultsmentioning

confidence: 99%

Halloysite Nanotube-Enhanced Polyacrylonitrile Ultrafiltration Membranes: Fabrication, Characterization, and Performance Evaluation

Acarer,

Pir,

Tüfekci

et al. 2023

ACS Omega

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“…PVDF and PVP were dissolved separately in DMF with weight percentages of 12.5 and 2.5 wt.%, respectively [ 29 ]. After the complete dissolving of the two polymers, they were blended together and stirred for 2 h to ensure the homogeneity of the mixture.…”

Section: Methodsmentioning

confidence: 99%

Enhancing the Antifouling Properties of Alumina Nanoporous Membranes by GO/MOF Impregnated Polymer Coatings: In Vitro Studies

Moaness,

El-Sayed,

Beherei

et al. 2024

JFB

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Nanoporous membranes (NPMBs) have been the focus of interest of many scientists in the last decade. However, the fouling phenomenon that takes place during the implantation period blocks pores and causes failure in the local implant. In this study, alumina NPMBs were developed using electrochemical anodization through two steps. Furthermore, graphene oxide (GO), free and impregnated with ZIF-8 MOF, was synthesized and loaded in a mixture of PVDF/PVP polymer matrix at different ratios, and was applied to the produced NPMBs using spin-coater. The NPMBs were characterized before and after coating by SEM/EDX, TEM, FTIR, XRD, contact angle and AFM. The antifouling features of the NPMBs were analyzed against two different bacterial species. The prepared alumina NPMBs demonstrated homogeneous porous structures with pore sizes ranging from 36 to 39 nm. The coated layers were proven to possess microporous coatings on the surfaces of the NPMBs. The numbers of released ions (Al and Zn) from the coated NPMBs were below the allowed limits. Bovine serum albumin (BSA) uptake in artificial cerebrospinal fluid (ACSF) was impressively reduced with the presence of coating materials. In addition, the antifouling behavior of the coated NPMBs against the selected strains of bacteria was greatly enhanced compared with the pure alumina NPMBs. Finally, NPMBs’ uncoated and polymer-coated membranes were tested for their ability to deliver donepezil HCl. The results reveal the downregulation of donepezil release, especially from NPMBs coated with PVDF/PVP 0.5GO. It is advised to use the current antifouling materials and techniques to overcome the limitations of the inorganic NPMBs implants.

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“…Access to safe and clean water is crucial for maintaining good health as it plays a vital role in our life cycle [1]. Even though 97% of the earth's surface is covered with seawater [2], which is unsuitable for human consumption due to its high salt content, only 2.5% of the world's water is freshwater, with the remaining 2% being stored in glaciers and ice caps [3].…”

Section: Introductionmentioning

confidence: 99%

Beta-Cyclodextrin Molecules (β‐CD) Modified PVDF Membranes to Remove Multi-Ionic Dye Solutions using Steric, Inclusion, and Dielectric Exclusion

Alrashedi,

KOCHKAR,

Ercan

2024

Preprint

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In this study, we aim to evaluate how cyclodextrin molecules affect the hydrophilicity and selec-tivity of PVDF membrane. Herein, we prepared PVDF-PVP(1-x) β-CDx membranes, with x rang-ing from 0 to 1 wt%. The membranes were deeply characterized by means of X-ray diffraction (XRD), attenuated total reflectance infrared (ATR-IR), Raman spectroscopies, Thermal gravimet-ric analysis (TGA), Contact angle measurement (CA), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The study unequivocally demonstrates the effectiveness of the addition of β-CD molecules on membranes' structural, morphological, and dielectric properties. Adding 0.25wt% β-CD enhanced hydrophilicity, with CA decreasing from 72.6° to 56° and roughness decreasing from 81 to 29 nm. The PVDF-PVP(1-x) β-CDx membranes were then fully characterized using electrochemical impedance spectroscopy (EIS) to determine their dielectric properties, which clearly showed that the presence of β-CD induced polarization of the mem-brane. The separation of various dyes with different sizes and charges was utilized. These dyes included methylene blue (MB, positive, 0.504 nm), methyl red (MR, neutral, 0.487 nm), rose Bengal (RB, negative, 0.588 nm), and brilliant blue (BB, negative, 0.798 nm). Based on our re-search, we found that the membrane's selectivity is determined by both exclusion factors (such as size and dielectric properties) and inclusion inside the β-CD cage. We found that using alpha-CD instead of beta-CD led to the disappearance of dye inclusion. These findings strongly sug-gest that β-CD molecules can be a viable solution for dye removal from wastewater.

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PVDF based Nanocomposite Membranes: Application towards Wastewater treatment

Cited by 8 publications

References 56 publications

Halloysite Nanotube-Enhanced Polyacrylonitrile Ultrafiltration Membranes: Fabrication, Characterization, and Performance Evaluation

Halloysite Nanotube-Enhanced Polyacrylonitrile Ultrafiltration Membranes: Fabrication, Characterization, and Performance Evaluation

Enhancing the Antifouling Properties of Alumina Nanoporous Membranes by GO/MOF Impregnated Polymer Coatings: In Vitro Studies

Beta-Cyclodextrin Molecules (β‐CD) Modified PVDF Membranes to Remove Multi-Ionic Dye Solutions using Steric, Inclusion, and Dielectric Exclusion

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