Novel Maleic Acid, Crosslinked, Nanofibrous Chitosan/Poly (Vinylpyrrolidone) Membranes for Reverse Osmosis Desalination

Ali, Israr; Raza, Muhammad Asim; Mehmood, Rashid; Islam, Atif; Sabir, Aneela; Gull, Nafisa; Haider, Bilal; Park, Sang Hyun; Khan, Rafi Ullah

doi:10.3390/ijms21197338

Cited by 16 publications

(12 citation statements)

References 44 publications

(37 reference statements)

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“…The hydrogel composites presented improved WCA by increasing TEOS quantities, which changed the wettability of the sample from hydrophilicity to hydrophobicity. At the same time, Ali et al [ 59 ] prepared a thin film based on the composites CS and polyvinylpyrrolidone (PVP) cross-linked with maleic acid for membrane desalination application. The WCA improved with increase in maleic acid concentration from 0.5% to 2.5%.…”

Section: Discussionmentioning

confidence: 99%

Modification of Physio-Mechanical Properties of Chitosan-Based Films via Physical Treatment Approach

et al. 2022

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The premise of this work is the modification of the properties of chitosan-based film for possible use in food packaging applications. The biofilm was prepared via thermal and mechanical treatment through blending polymers with chitosan using Polyvinyl Alcohol (PVA) and loading different types of chemical agents, i.e., citric acid (CA), succinic acid (SA), and tetraethoxysilane (TEOS). The modification was carried out under high-speed homogenization at elevated temperature to induce physical cross-linkage of chitosan polymer chains without a catalyst. The findings showed that PVA improved the chitosan films’ Tensile strength (TS) and elongation at break (Eb). The presence of chemicals caused an increase in the film strength for all samples prepared, in which a 5% w/w of chemical in the optimum composition CS/PVA (75/25) provided the maximum strength, namely, 33.9 MPa, 44.0 MPa, and 41.9 MPa, for CA-5, SA-5, and TEOS-5, respectively. The chemical agents also increased the water contact angles for all tested films, indicating that they promoted hydrophobicity. The chemical structure analysis showed that, by incorporating three types of chemical agents into the CS/PVA blend films, no additional spectral bands were found, indicating that no covalent bonds were formed. The thermal properties showed enhancement in melting peak and degradation temperature of the blend films, compared to those without chemical agents at the optimum composition. The X-ray diffraction patterns exhibited that PVA led to an increasing crystallization tendency in the blend films. The morphological observation proved that no irregularities were detected in CS/PVA blend films, representing high compatibility with both polymers.

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Section: Discussionmentioning

confidence: 99%

Modification of Physio-Mechanical Properties of Chitosan-Based Films via Physical Treatment Approach

et al. 2022

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“…Therefore, RO can be used to purify saltwater to produce fresh water on the low-pressure side of the membrane. RO technology has been increasing globally and has gradually replaced the conventional distillation method [ 89 , 90 , 91 ].…”

Section: Technology For Routine Water Purification Based On Nanofiber...mentioning

confidence: 99%

“…In this system, the permeation flux could reach 34.6 L·m −2 ·h −1 and the desalination rate was 97% [ 94 ]. Additionally, the active layer of the RO membrane could also be created by an ENM including CS and maleic acid-crosslinked PVP [ 91 ]. By combining the active layer with the 3-triethoxysilane-functionalized CA membrane substrate, another RO membrane was created.…”

Section: Technology For Routine Water Purification Based On Nanofiber...mentioning

confidence: 99%

Research Progress of Water Treatment Technology Based on Nanofiber Membranes

Liu

et al. 2023

Polymers

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In the field of water purification, membrane separation technology plays a significant role. Electrospinning has emerged as a primary method to produce nanofiber membranes due to its straightforward, low cost, functional diversity, and process controllability. It is possible to flexibly control the structural characteristics of electrospun nanofiber membranes as well as carry out various membrane material combinations to make full use of their various properties, including high porosity, high selectivity, and microporous permeability to obtain high-performance water treatment membranes. These water separation membranes can satisfy the fast and efficient purification requirements in different water purification applications due to their high filtration efficiency. The current research on water treatment membranes is still focused on creating high-permeability membranes with outstanding selectivity, remarkable antifouling performance, superior physical and chemical performance, and long-term stability. This paper reviewed the preparation methods and properties of electrospun nanofiber membranes for water treatment in various fields, including microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis, and other special applications. Lastly, various antifouling technologies and research progress of water treatment membranes were discussed, and the future development direction of electrospun nanofiber membranes for water treatment was also presented.

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“…Even though the phase inversion method of fabricating MMMs is simple, achieving the best membrane performance is often difficult. Several strategies have been adopted to enhance the performance of MMMs by annealing post-treatment, polymer composition adjustment (e.g., polymer type, polymer concentration, additive inclusion), and casting/spinning conditions (e.g., composition, temperature, humidity) [ 87 ]. After casting the MMMs, a residual solvent can be removed by drying post-treated in an oven at a specific temperature allowable by the polymer glass transition temperature.…”

Section: Development Of Antiviral Mmmsmentioning

confidence: 99%

Antiviral Nanomaterials for Designing Mixed Matrix Membranes

et al. 2021

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Membranes are helpful tools to prevent airborne and waterborne pathogenic microorganisms, including viruses and bacteria. A membrane filter can physically separate pathogens from air or water. Moreover, incorporating antiviral and antibacterial nanoparticles into the matrix of membrane filters can render composite structures capable of killing pathogenic viruses and bacteria. Such membranes incorporated with antiviral and antibacterial nanoparticles have a great potential for being applied in various application scenarios. Therefore, in this perspective article, we attempt to explore the fundamental mechanisms and recent progress of designing antiviral membrane filters, challenges to be addressed, and outlook.

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Novel Maleic Acid, Crosslinked, Nanofibrous Chitosan/Poly (Vinylpyrrolidone) Membranes for Reverse Osmosis Desalination

Cited by 16 publications

References 44 publications

Modification of Physio-Mechanical Properties of Chitosan-Based Films via Physical Treatment Approach

Modification of Physio-Mechanical Properties of Chitosan-Based Films via Physical Treatment Approach

Research Progress of Water Treatment Technology Based on Nanofiber Membranes

Antiviral Nanomaterials for Designing Mixed Matrix Membranes

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