In situ generation of silver and silver oxide nanoparticles on cotton fabrics using Tinospora cordifolia as bio reductant

Gollapudi, Venkata Ramanamurthy; Mallavarapu, Umamahesh; Jaswanth, Seetha; Akepogu, Prasad; Amara, Venkateswara Rao; Hariram, N.; Anumakonda, Varadarajulu

doi:10.1007/s42452-020-2331-1

Cited by 16 publications

(5 citation statements)

References 39 publications

(42 reference statements)

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“…However, a slight deviation in thermal stability is noticed for AgNPs-treated test specimens compared to the control kraft paper materials, although nanosilver loading increased the mechanical properties and UV-shielding capabilities. This phenomenon also conforms with other studies for Tinospora cordifolia extract-mediated cotton fibers functionalization with AgNPs ( Gollapudi et al, 2020 ). In DTG analysis, peaks around 300°C demonstrate hemicellulose degradation, and the peaks around 370°C correspond to cellulose from kraft fiber materials.…”

Section: Resultssupporting

confidence: 93%

Biosynthesis of novel metallic silvers on kraft papers using cephalotaxus harringtonia fruit extract as a sustainable stabilizing agent (KP@AgNP)

Wei

Liu

Xie

et al. 2022

Front. Bioeng. Biotechnol.

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Greenly synthesized silver nanoparticles (AgNPs) on different cellulosic materials show tremendous potential for colorful, biocidal, and reasonably strong products by replacing the traditional chemical-based synthesis protocols. This study reports on a novel in situ synthesis protocol for synthesizing green and sustainable AgNPs over cellulosic kraft paper substrates using a bio-based stabilizing agent (Cephalotaxus harringtonia fruit extract). The protocol could play a significant role in packaging industries. The aqueous extracts of Cephalotaxus harringtonia fruits have been used to synthesize the metallic silver. The deposited AgNPs values were investigated through XRF (X-ray fluorescence) analysis. The number of deposited nanoparticles (NPs) was 268 ± 7, 805 ± 14, and 1,045 ± 16 PPM, respectively for 0.5, 1.5, and 2.5 mm silver precursors. The developed products were tested with SEM (scanning electron microscopy), SEM-mediated elemental mapping, EDX (energy disruptive X-ray), FTIR (Fourier transform infrared spectroscopy), and XRD (X-Ray diffraction). XRD analysis further confirmed the presence of peaks for elemental AgNP on the deposited papers. Colorimetric values were measured to confirm the colorful appearances of the developed metallic silvers. Mechanical properties were tested in terms of the tensile index and bursting index. Moreover, the statistical analysis of coefficient of variations (R2) and a post-hoc ANOVA test that adopted the Newman-Keul methodology also confirm the significance of developed nanoparticles in the papers. The shielding capacity against UV light was also investigated; all the AgNPs-treated products provided values higher than 40, demonstrating the strong UV resistance capability of the kraft paper material. Overall, the study confirms a successful development of green AgNPs on paper materials.

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Section: Resultssupporting

confidence: 93%

Biosynthesis of novel metallic silvers on kraft papers using cephalotaxus harringtonia fruit extract as a sustainable stabilizing agent (KP@AgNP)

Wei

Liu

Xie

et al. 2022

Front. Bioeng. Biotechnol.

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“…However, the use of graft polymers as a binding agent not only involved the use of additional chemicals but also resulted in nonuniform deposition of AgNP on fabrics and a reduction in antimicrobial activity of the AgNP [ 13 , 18 ]. In situ synthesis of AgNP on fabrics by both chemical [ 19 ], as well as green routes [ 20 ], resulted in a more uniform deposition of AgNP and an increase in durability of treatment but not sufficient enough to eliminate loss of AgNP on washing [ 13 , 19 ]. The use of AgNP-treated fabrics is increasing and so is the growing concern about the negative impact of AgNP leached during washing/usage on the aquatic life [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Wash-Durable Antimicrobial Cotton Fabrics by In Situ Green Synthesis of Silver Nanoparticles and Investigation of Their Antimicrobial Efficacy against Drug-Resistant Bacteria

et al. 2022

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An environment friendly and wash-durable silver nanoparticle treatment of cotton fabrics was carried out by in situ reduction of silver nitrate using Azadirachta indica leaf extract. The wash durability of the silver nanoparticles treatment on the cotton fabric was improved by pretreating the fabrics by mercerization and by adopting hydrothermal conditions of 120 °C temperature and 15 psi pressure for the in situ synthesis. The silver nanoparticle treated fabrics were characterized using scanning electron microscopy, colorimetric analysis and inductively coupled plasma mass spectroscopy. The coating of silver nanoparticles was seen to be dense and uniform in the scanning electron micrographs of the treated fabrics. An evaluation of the antibacterial efficacy of the silver nanoparticle treated fabric against antibiotic-resistant Gram-positive and Gram-negative strains was carried out. The antibacterial efficacy was found to be the highest against Bacillus licheniformis, showing 93.3% inhibition, whereas it was moderate against Klebsiella pneumoniae (20%) and Escherichia coli (10%). The transmittance data of a UV spectrophotometer (290–400nm) was used for measuring the UV protection factor of the silver nanoparticle treated fabrics. All the silver nanoparticle treated fabrics showed good antimicrobial and UV protection activity. The treatment was also seen to be durable against repeated laundering. This paper contributes the first report on a novel green synthesis approach integrating mercerization of cotton fabrics and in situ synthesis of nanoparticles under hydrothermal conditions using Azadirachta indica leaf extract for improved wash durability of the multifunctional fabric.

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“…For example, Raghavendra et al (2013) prepared gum acacia or guar-gum-loaded cotton fibers with and without AgNPs and found that the presence of AgNPs in the fibers enhanced their tensile strength and elastic modulus (Raghavendra et al 2013). Gollapudi et al (2020) also reported the effects of AgNP synthesis on the properties of cotton fabrics (Gollapudi et al 2020). With the increase in the AgNO3 concentration, the tensile strength and elastic modulus of the cotton fabric with AgNPs also increased.…”

Section: Resultsmentioning

confidence: 99%

Wet-spinning of TEMPO-oxidized lignocellulose nanofibrils and functionalization of the filament with Ag nanoparticles

Park

Bandi

Dadigala

et al. 2022

BioRes

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Wet spinning was studied for lignocellulose nanofibrils (TOLCNF) obtained by TEMPO oxidation and mechanical defibrillation of deep eutectic-like solvent-treated lignocellulose. First, the morphological characteristics, water retention value, and specific surface area of the TOLCNF were studied. The effects of the TOLCNF concentration (1.5, 2.0, and 2.5 wt%) and spinning rate (0.1, 1.0, and 10 mL/min) on the wet-spun filament diameter, orientation index, and tensile properties were studied. With an increase in the TOLCNF concentration, the average diameter increased, whereas the orientation index and tensile strength decreased. An increased spinning rate resulted in an increased orientation index and tensile strength but a decrease in the average diameter. To further extend their applicability, Ag nanoparticles (AgNPs) were grown in situ on the filament surface using UV irradiation. Spherical AgNPs with diameters of 30 to 90 nm were observed using scanning electron microscopy. An increased AgNP content improved the tensile strength and elastic modulus of the filaments.

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In situ generation of silver and silver oxide nanoparticles on cotton fabrics using Tinospora cordifolia as bio reductant

Cited by 16 publications

References 39 publications

Biosynthesis of novel metallic silvers on kraft papers using cephalotaxus harringtonia fruit extract as a sustainable stabilizing agent (KP@AgNP)

Biosynthesis of novel metallic silvers on kraft papers using cephalotaxus harringtonia fruit extract as a sustainable stabilizing agent (KP@AgNP)

Development of Wash-Durable Antimicrobial Cotton Fabrics by In Situ Green Synthesis of Silver Nanoparticles and Investigation of Their Antimicrobial Efficacy against Drug-Resistant Bacteria

Wet-spinning of TEMPO-oxidized lignocellulose nanofibrils and functionalization of the filament with Ag nanoparticles

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