Development of multifunctional polyacrylonitrile/silver nanocomposite films: Antimicrobial activity, catalytic activity, electrical conductivity, UV protection and SERS-active sensor

Rehan, Mohamed; Nada, Amr A.; Khattab, Tawfik A.; Abdelwahed, Nayera A. M.; El‐Kheir, Amira Abou

doi:10.1016/j.jmrt.2020.05.079

Cited by 67 publications

(26 citation statements)

References 67 publications

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“…A faster initial release and the subsequent slow-release profiles of silver elements are advantageous for different applications. A quick release of silver can be observed within 2 h of immersion, followed by a gradual increase till 24 h. A similar observation was reported in previously published works [ 72 ]. This release amount till 24 h is accounted for ~90% of total silver release, Figure 10 b,b*.…”

Section: Resultssupporting

confidence: 90%

Fabricating Antibacterial and Antioxidant Electrospun Hydrophilic Polyacrylonitrile Nanofibers Loaded with AgNPs by Lignin-Induced In-Situ Method

et al. 2021

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Concerning the environmental hazards owing to the chemical-based synthesis of silver nanoparticles (AgNPs), this study aimed to investigate the possibility of synthesizing AgNPs on the surface polyacrylonitrile (PAN) nanofibers utilizing biomacromolecule lignin. SEM observations revealed that the average diameters of the produced nanofibers were slightly increased from ~512 nm to ~673 nm due to several factors like-swellings that happened during the salt treatment process, surface-bound lignin, and the presence of AgNPs. The presence of AgNPs was validated by transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) analysis. The amount of synthesized AgNPs on PAN nanofibers was found to be dependent on both precursor silver salt and reductant lignin concentration. Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectra confirm the presence of lignin on PAN nanofibers. Although the X-ray diffraction pattern did not show any AgNPs band, the reduced intensity of the stabilized PAN characteristics bands at 2θ = 17.28o and 29.38o demonstrated some misalignment of PAN polymeric chains. The water contact angle (WCA) of hydrophobic PAN nanofibers was reduced from 112.6 ± 4.16o to 21.4 ± 5.03o for the maximum AgNPs coated specimen. The prepared membranes exhibited low thermal stability and good swelling capacity up to 20.1 ± 0.92 g/g and 18.05±0.68 g/g in distilled water and 0.9 wt% NaCl solution, respectively. Coated lignin imparts antioxidant activity up to 78.37 ± 0.12% at 12 h of incubation. The resultant nanofibrous membranes showed a proportional increase in antibacterial efficacy with the rise in AgNPs loading against both Gram-positive S. aureus and Gram-negative E. coli bacterial strains by disc diffusion test (AATCC 147-1998). Halos for maximum AgNPs loading was calculated to 18.89 ± 0.15 mm for S. aureus and 21.38 ± 0.17 mm for E. coli. An initial burst release of silver elements within 24 h was observed in the inductively coupled plasma-atomic emission spectrometry (ICP-AES) test, and the release amounts were proportionally expansive with the increase in Ag contents. Our results demonstrated that such types of composite nanofibers have a strong potential to be used in biomedicine.

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Section: Resultssupporting

confidence: 90%

Fabricating Antibacterial and Antioxidant Electrospun Hydrophilic Polyacrylonitrile Nanofibers Loaded with AgNPs by Lignin-Induced In-Situ Method

et al. 2021

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“…The endothermic peak at 69 °C is attributed to the glass transition temperature ( T g ) of the polymer matrix functionalized with Ag NPs. The initial and final melting temperatures of the material were 277 and 291 °C, respectively, which was due to the occurrence of cyclization reactions of the nitrile group [ 34 , 38 ]. The heat capacity ( C p ) at the initial reaction temperature was 12.94 J g −1 °C −1 .…”

Section: Resultsmentioning

confidence: 99%

“…The peak at 575 cm −1 is due to the Ag-O coordination bond, while peaks within the range of 1168-1381 cm −1 are attributed to the symmetric and asymmetric -COO − stretching of the alginate backbone. The reduced intensity of the peak associated with the nitrile functionality (2246 cm −1 ) is an indication of copolymerization between PAN and Alg rather than evidence of homo-polymerization of acrylonitrile [33,34]. displays the XRD spectra of PAN-g-Alg@Ag and its discrete components, providing information about the nanocomposite's crystalline structure.…”

Section: Characterization Of the Synthesized Nanocompositementioning

confidence: 99%

A Highly Efficient Ag Nanoparticle-Immobilized Alginate-g-Polyacrylonitrile Hybrid Photocatalyst for the Degradation of Nitrophenols

et al. 2020

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Herein, we report PAN-g-Alg@Ag-based nanocatalysts synthesis via in situ oxidative free-radical polymerization of acrylonitrile (AN) using Alg@Ag nanoparticles (Alg@Ag NPs). Various analytical techniques, including FTIR, XRD, SEM, TEM, UV–Vis, and DSC, were employed to determine bonding interactions and chemical characteristics of the nanocatalyst. The optimized response surface methodology coupled central composite design (RSM–CCD) reaction conditions were a 35-min irradiation time in a 70-mg L−1 2,4-dinitrophenol (DNP) solution at pH of 4.68. Here, DNP degradation was 99.46% at a desirability of 1.00. The pseudo-first-order rate constant (K1) values were 0.047, 0.050, 0.054, 0.056, 0.059, and 0.064 min−1 with associated half-life (t1/2) values of 14.74, 13.86, 12.84, 12.38, 11.74, 10.82, and 10.04 min that corresponded to DNP concentrations of 10, 20, 30, 40, 50, 60, and 70 mg L−1, respectively, in the presence of PAN-g-Alg@Ag (0.03 g). The results indicate that the reaction followed the pseudo-first-order kinetic model with an R2 value of 0.99. The combined absorption properties of PAN and Alg@Ag NPs on copolymerization on the surface contributed more charge density to surface plasmon resonance (SPR) in a way to degrade more and more molecules of DNP together with preventing the recombination of electron and hole pairs within the photocatalytic process.

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“…Additionally, 1078 signal due to the CO present in the HPMC structure shows a slight displacement up to 1070 cm − 1 and the CO 1070 /CH 1454 intensity ratio varies from 1.05 in the PAN to 1.17 in the PAN/10%HPMC/1% AgNO 3 membrane. The FTIR analysis of the PAN/1%AgNO 3 membrane, no changes in the spectrum were observed with the presence of silver in the PAN nano bers [32,33]. This suggests an intramolecular homogeneity of the electrospun membranes, where the properties of the bers are enhanced after being modi ed with HPMC and added with AgNO 3 .…”

Section: Porositymentioning

confidence: 87%

Integrated Treatment of Mining Dam Wastewater with Quaternized Chitosan and PAN/HPMC/AgNo3 Nanostructured Hydrophylic Membranes

et al. 2021

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This study was developed a novel nanostructured membrane by electrospinning process, from polyacrylonitrile (PAN) modify by hydroxypropyl methylcellulose (HPMC) polymers containing AgNO 3 , to be used as a lter in an integrated wastewater dam treatment process to reuse it as drinking water. Different formulations (108 samples) were electrospun from PAN and (0, 5, 10%w) HPMC and (0, 0.5, 1%w) solutions to selected a more e cient formulation in water disinfection and higher hydrophilic character of the membrane to ow performance in the wastewater treatment. The PAN and HPMC phases in membranes were characterize by infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The nanostructured membranes (SEM) were characterized by thickness ber between 251 ± 58 and 306 ± 49 nm and lower ber/membrane volume relations. The presence of HPMC and AgNO 3 in membrane formulation endows superhydrophilicity and permeability increase which up to 21,151 ± 445 L.m -2 .h -1 . After ltration process with PAN/HPMC/AgNO 3 , all the tested water potability indexes were achieved. The primary treatment, using quaternized chitosan reduced the turbidity parameter from 19,000 NTU to 14 NTU, and after ltration with nanostructured membrane, to levels was below 1 NTU and pathogenic potential removed (Total Coliform and Escherichia coli). The results of this study indicated that the hydrophilic nanostructured membranes PAN/10%HPMC/1%AgNO 3 have adequate properties to potential wastewater treatment mining for reuse. It´s give a sustainable strategy for managing wastewater which should be reduce the volume of water in the tailing's dams and contributes to increasing the stability of dams and reducing risks with catastrophic environmental impact.

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Development of multifunctional polyacrylonitrile/silver nanocomposite films: Antimicrobial activity, catalytic activity, electrical conductivity, UV protection and SERS-active sensor

Cited by 67 publications

References 67 publications

Fabricating Antibacterial and Antioxidant Electrospun Hydrophilic Polyacrylonitrile Nanofibers Loaded with AgNPs by Lignin-Induced In-Situ Method

Fabricating Antibacterial and Antioxidant Electrospun Hydrophilic Polyacrylonitrile Nanofibers Loaded with AgNPs by Lignin-Induced In-Situ Method

A Highly Efficient Ag Nanoparticle-Immobilized Alginate-g-Polyacrylonitrile Hybrid Photocatalyst for the Degradation of Nitrophenols

Integrated Treatment of Mining Dam Wastewater with Quaternized Chitosan and PAN/HPMC/AgNo3 Nanostructured Hydrophylic Membranes

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