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Preparation of poly(AAm-co-HEMA)/ZnO nanocomposites via in situ polymerization/hydrothermal method and determination of their properties. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04343-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Removal of Safranin-T and Toluidine from Water through Gum Arabic/Acrylamide Hydrogel. ADSORPT SCI TECHNOL 2022. [DOI: 10.1155/2022/6100791] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Hydrogels as “smart sorbents” for wastewater treatment have attracted much attention due to their facile fabrication, rapid regeneration, environment friendly nature, and strong interaction with pollutants. In this study, gum arabic/acrylamide (GA/AM) hydrogel was developed via the free radical polymerization method by employing acrylamide (AM) (monomer), gum arabic (GA) (grafting backbone), N,N-methylenebisacrylamide (MBA) (chemical crosslinker), and tetramethylethylenediamine (TEMED) (accelerator). The fabricated adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and surface area analyzer. The adsorption properties of the subject hydrogel were explored against cationic safranin and toluidine dyes in aqueous media. The point of zero charge (PZC) for the GA/AM sorbent was found to be
whereas maximum sorption occurred at pH 11. Different kinetic and isotherm models were applied to evaluate the adsorption mechanism and estimate values of different adsorption parameters. The adsorption isotherm and kinetics were better explained by the Langmuir isotherm and pseudo-second-order kinetic model whereas the adsorption thermodynamics depicted the endothermic, spontaneous, and favorable nature of the process. The adsorbent was regenerated with acetone and reused for the selected dyes for many cycles. After the 5th cycle, the hydrogel retained safranin/toluidine removal
which pointed toward the reusability of the prepared adsorbent for cycles without appreciable reduction in its adsorption capacity. Hence, the GA/AM sorbent can be applied as an alternative of activated carbon to treat dye-contaminated waters.
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Naz M, Rizwan M, Jabeen S, Ghaffar A, Islam A, Gull N, Rasool A, Khan RU, Alshawwa SZ, Iqbal M. Cephradine drug release using electrospun chitosan nanofibers incorporated with halloysite nanoclay. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
The chitosan/polyvinyl alcohol/halloysite nanoclay (CS/PVA/HNC) loaded with cephradine drug electrospun nanofibers (NFs) were fabricated and characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) techniques. FTIR analysis confirmed the hydrogen bonding between the polymer chain and the developed siloxane linkages. SEM analysis revealed the formation of uniform NFs having beads free and smooth surface with an average diameter in 50–200 nm range. The thermal stability of the NFs was increased by increasing the HNC concentration. The antimicrobial activity was examined against Escherichia
coli and staphylococcus strains and the NFs revealed auspicious antimicrobial potential. The drug release was studied at pH 7.4 (in PBS) at 37 °C. The drug release analysis showed that 90% of the drug was released from NFs in 2 h and 40 min. Hence, the prepared NFs could be used as a potential drug carrier and release in a control manner for biomedical application.
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Affiliation(s)
- Mahwish Naz
- Department of Chemistry , University of Engineering and Technology , Lahore , Pakistan
| | - Muhammad Rizwan
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
| | - Sehrish Jabeen
- Institute of Polymer and Textile Engineering , University of the Punjab , Lahore , Pakistan
| | - Abdul Ghaffar
- Department of Chemistry , University of Engineering and Technology , Lahore , Pakistan
| | - Atif Islam
- Institute of Polymer and Textile Engineering , University of the Punjab , Lahore , Pakistan
| | - Nafisa Gull
- Institute of Polymer and Textile Engineering , University of the Punjab , Lahore , Pakistan
| | - Atta Rasool
- School of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Rafi Ullah Khan
- Institute of Polymer and Textile Engineering , University of the Punjab , Lahore , Pakistan
| | - Samar Z. Alshawwa
- Department of Pharmaceutical Sciences , College of Pharmacy, Princess Nourah bint Abdulrahman University , Riyadh , Saudi Arabia
| | - Munawar Iqbal
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
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Uzma, Alam S, Subhan H, Shah LA, Khattak NS. Swelling and kinetic investigations of basic blue-3 sorption by polyacrylamide/Gum Arabic hybrid hydrogel in aqueous medium. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Removal of noxious dyes from waste water is highly desirable for the safety of humans, aquatic life and natural environment. The issue was addressed in the present work by one pot fabrication of polyacrylamide/Gum Arabic (pAAm/GA) composite hydrogel which was applied as sorbent for basic blue-3 (BB3) eradication. The synthesis of the material was confirmed by scanning electron microscopy (SEM), Fourier Transformed Infrared (FTIR) spectroscopy and thermo gravimetric analysis (TGA). Besides, the same techniques also evidenced BB3 uptake by the hydrogel. In distilled water, the swelling capacities of the hydrogel was investigated at pH 7 and the nature of water diffusion into the hydrogel was probed from the resultant data. The composite hydrogel reached equilibrium point in 24 h after which no appreciable water absorption occurred. The adsorption of BB3 by the hybrid material was comprehensively investigated which involved the effect of contact time, temperature and pH on the sorption capacity of the hybrid sorbent. The obtained data fitted well into pseudo second order kinetic model and the adsorption took place in three consecutive kinetic phases. Moreover, sorption thermodynamics revealed non spontaneous and endothermic nature of BB3 sorption accompanied with increase in degree of order.
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Affiliation(s)
- Uzma
- Polymer Laboratory , National Centre of Excellence in Physical Chemistry, University of Peshawar , Peshawar 25120 , Pakistan
- Department of Chemistry , University of Malakand , KPK , Pakistan
| | - Sultan Alam
- Department of Chemistry , University of Malakand , KPK , Pakistan
| | - Hanif Subhan
- Polymer Laboratory , National Centre of Excellence in Physical Chemistry, University of Peshawar , Peshawar 25120 , Pakistan
- Department of Chemistry , University of Malakand , KPK , Pakistan
| | - Luqman Ali Shah
- Polymer Laboratory , National Centre of Excellence in Physical Chemistry, University of Peshawar , Peshawar 25120 , Pakistan
| | - Noor Saeed Khattak
- Center for Materials Science , Islamia College University , Peshawar 25120 , Pakistan
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Synthesis and physiochemical performances of PVC-sodium polyacrylate and PVC-sodium polyacrylate-graphite composite polymer membrane. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1763] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
Three types (type-A, B, and C) of composite polymeric membranes (CPMs) based on poly vinyl chloride (PVC) and different fillers (sodium polyacrylate and sodium polyacrylate-graphite) soaked in water and 0.5 N HCl were prepared using solvent casting method. Different physicochemical parameters such as microscopic surface study, water uptake, perpendicular swelling, density, porosity (ε), ion exchange capacity, and conductivity of the as the prepared CPMs were evaluated. Interestingly, type-A CPM cast with filler-A has greater values of the above parameters except density and ionic conductivity than those of type-B and C CPMs. The water uptake of type-A, B and C composite membranes was respectively in the range of 220.42–534.70, 59.64–41.65, and 15.94–2.62%. Ion exchange capacity of type-A, B and C CPMs was in the range of 3.669 × 107–2.156 × 107, 5.948 × 107–1.258 × 107, and 1.454 × 107–1.201 × 107 m.eq.g−1 respectively while the conductivity order was type-A < B < C. These types of CPMs may be helpful in many applications including proton exchange membranes, fuel cell like devices, as sensors for different metals, gas purification, water treatment, and battery separators.
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