Synthesis, characterization and desalination study of polyvinyl chloride-co-vinyl acetate/cellulose acetate membranes integrated with surface modified zeolites

Jamshaid, Fahd; Dilshad, Muhammad Rizwan; Islam, Atif; Khan, Rafi Ullah; Ahmad, Adnan; Adrees, Muhammad; Haider, Bilal

doi:10.1016/j.micromeso.2020.110579

Cited by 44 publications

(8 citation statements)

References 60 publications

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“…The FTIR spectra of cross-linked and uncross-linked PVA/ gelatin hydrogels are shown in Figure 2. In all the spectra, the broad peak found near 3274 cm �1 was due to stretching vibrations of H-bonded -OH 47,48 and H-bonded N-H groups. 49 The stretching peak at 2935 cm �1 was due to C-H groups [50][51][52] of the protein and the peak at 1425 cm �1 was attributed to C-H bending vibration.…”

Section: Ftir Analysismentioning

confidence: 95%

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

Zeeshan¹,

Dilshad

Islam³

et al. 2021

High Performance Polymers

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The objective of this work is to fabricate hydrogel films which are biodegradable and also fit for packaging applications. The hydrogel films were prepared by the reaction of polyvinyl alcohol and gelatin with and without 3-aminopropyltriethoxysilane (APTEOS) cross-linker. The hydrogel films were then characterized by FTIR spectroscopy, degree of swelling, TGA, SEM analysis and mechanical testing. The FTIR spectra of the hydrogel films confirmed the presence of both polymers and hydrogen bonding between them. TGA analysis confirmed the increase in thermal stability with the increase of cross-linker amount. SEM analysis confirmed the increase in uniformity of structure with the increase of cross-linker amount. The increase in cross-linker amount resulted in decrease of degree of swelling and increase of tensile strength. The biodegradability of hydrogel films was evaluated by performing soil burial test and found to be decreased with the increase of cross-linker amount. In order to balance the tensile strength and biodegradability, the optimum amount of cross-linker was determined which resulted in the formation of the best performing film. Finally, our best performing film was compared with other hydrogel films reported in the literature. Hence, the hydrogel films cross-linked with APTEOS are biodegradable, having high tensile strength and suitable for packaging purpose.

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Section: Ftir Analysismentioning

confidence: 95%

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

Zeeshan¹,

Dilshad

Islam³

et al. 2021

High Performance Polymers

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“…The other study was performed to see the effect of temperature on the adsorbent activity and efficiency at different temperatures and constant contact time of 30 min, and the temperatures were 25, 35, 45, and 55°C. In each study, a UV-Vis (Varian, model Cary 1E) spectrophotometer (λmax: 482 nm) was used to measure ERY equilibrium concentrations using a calibration curve of different concentrations (Jamshaid et al, 2020).…”

Section: Adsorption Procedures (Import)mentioning

confidence: 99%

Zeolite/Cellulose Acetate (ZCA) in Blend Fiber for Adsorption of Erythromycin Residue From Pharmaceutical Wastewater: Experimental and Theoretical Study

et al. 2021

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The expanding amount of remaining drug substances in wastewater adversely affects both the climate and human well-being. In the current investigation, we developed new cellulose acetic acid derivation/zeolite fiber as an effective technique to eliminate erythromycin (ERY) from wastewater. The number of interchangeable sites in the adsorbent structures and the ratio of ERY to the three adsorbents were identified as the main reasons for the reduction in adsorption as the initial ERY concentrations increased. Additionally, for all adsorbents, the pseudo–second-order modeling showed better fitting for the adsorption than the pseudo–first-order modeling. However, the findings obtained in the pseudo–first-order model were still enough for explaining the sorption kinetics of ERY, showing that the surface displayed all chemisorption and physi-sorption adsorption processes by both adsorbents. The R2 for the second order was very close to 1 for the three adsorbents in the case of pseudo–second-order. The adsorption capacity reached 17.76 mg/g. The three adsorbents showed negative values of ΔH, and these values were −6,200, −8,500, and −9600 kJ/mol for zeolite, CA, and ZCA, respectively, and this shows that the adsorption is exothermic. The desorption analysis shows no substantial loss of adsorption site after three trials, indicating higher stability and resilience of the three adsorbents, indicating a strong repeatability of their possible use in adsorption without contaminating the environment. In addition, the chemical attitude and possible donor–acceptor interactions of ERY were assessed by the quantum chemical parameters (QCPs) and NBO analysis performed, at the HF/6-311G** calculations.

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“…Recently, various 2D materials, including zeolites, − metal–organic frameworks (MOFs), − graphene, − MXenes, − h-BN, − TMDs, − and other nanosheet materials, − are widely used for high separation performance membranes due to their 2D layered structure, which makes them easy to prepare and modify to separate different molecules. − However, conventional polymer films cannot exist stably in complex environments, such as high temperatures, strong acids/bases, organic solvents, or corrosive environments . While the porous ceramic membrane overcomes the above shortcomings, the preparation process is complicated, the price is very expensive, and the brittleness is large, as it is easily broken during the pressure driving process .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Graphene Oxide Membranes for Nanofiltration

Yang

Xiao

Shen

et al. 2022

ACS Appl. Nano Mater.

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Advanced membrane separation technology plays an important role in achieving excellent water treatment, which can help solve the freshwater crisis. However, there remains a trade-off between membrane permeability and selectivity. An emerging candidate to address this issue is graphene oxide (GO), a two-dimensional (2D) laminated graphene derivative with abundant oxygen functional groups. Furthermore, the transport channels of GO-based membranes can be artificially modified and manipulated, exhibiting great promise for GO in the field of water purification and molecular separation. This review comprehensively summarizes the research advances on 2D GO-based membranes for high-performance nanofiltration (NF). It begins with an elaboration on the preparation methods of GO-based membranes, followed by a detailed summary of the chemical modification and physical manipulation of transport channels. Then we reviewed the current research progress of theoretical calculation and molecular dynamics simulation. Also, the high NF performance of GO-based membranes is presented. Finally, the remaining challenges and future prospects in order to develop advances in membrane technology are provided.

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Synthesis, characterization and desalination study of polyvinyl chloride-co-vinyl acetate/cellulose acetate membranes integrated with surface modified zeolites

Cited by 44 publications

References 60 publications

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

Zeolite/Cellulose Acetate (ZCA) in Blend Fiber for Adsorption of Erythromycin Residue From Pharmaceutical Wastewater: Experimental and Theoretical Study

Recent Advances in Graphene Oxide Membranes for Nanofiltration

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