Preparation and properties of cellulose nanocomposite films with in situ generated copper nanoparticles using Terminalia catappa leaf extract

Muthulakshmi, Lakshmanan; Rajini, N.; Nellaiah, H.; Kathiresan, T.; Jawaid, Mohammad; Rajulu, A. Varada

doi:10.1016/j.ijbiomac.2016.09.114

Cited by 76 publications

(23 citation statements)

References 12 publications

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“…They showed that the obtained Cu nanoparticles found outside the cellulose was in spherical shape with the size ranging from 21 to 30 nm. The obtained CuNP/cellulose functional materials exhibited excellent antimicrobial activity and tensile strength . Similar research was performed employing Azadirachta indica leaf extract for the functionalization of cellulose with Ag nanoparticles by Kishnji et al .…”

Section: Phytochemical Fabrication Of Functional Nanostructuressupporting

confidence: 65%

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Phytochemical Process for the Functionalization of Materials with Metal Nanoparticles: Current Trends and Future Perspectives

Hariram

Vivekanandhan²

2018

ChemistrySelect

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The bioreduction process, that utilizes the plant extracts, have been explored extensively as a green chemical route for the synthesis of metal nanoparticles due to their eco-friendly protocol as well as versatility in the selection of various plant resources. Recent advances in this plant extract mediated biological process are the fabrication of functional nanostructures. Bioreduction mechanism catalyzes the combining process of metal nanoparticles with other kind of materials including metal, metal oxides, cellulosic, zeolite and carbon nanomaterials. Integrating metal nanoparticles with various materials offers new functional properties and improves their performance comparing to their pristine counterpart. In this review, plant-based biochemical substances, which influence the metal ion into metal and their controlled nucleation on the surface of other kinds of materials are highlighted, and the future prospect of this bio-based synthesis of functional nanostructures are discussed.[a] M. Hariram, Dr. S. Vivekanandhan

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Section: Phytochemical Fabrication Of Functional Nanostructuressupporting

confidence: 65%

“…Recently, they were also used Terminalia catappa leaf extract to incorporate Cu nanoparticles on the cellulose matrix . They showed that the obtained Cu nanoparticles found outside the cellulose was in spherical shape with the size ranging from 21 to 30 nm.…”

Section: Phytochemical Fabrication Of Functional Nanostructuresmentioning

confidence: 99%

Phytochemical Process for the Functionalization of Materials with Metal Nanoparticles: Current Trends and Future Perspectives

Hariram

Vivekanandhan²

2018

ChemistrySelect

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“…This could be explained by the properties of the filler (CuNPs) and a decrease in the size of composite crystals, but the authors did not report moisture content of the samples. The authors of one more study [19] investigated mechanical properties of BCAgNP composite prepared by immersion of BC in 1-5 mM AgNO 3 solutions for 24 h, under continuous stirring. The tensile strength of the composite was 108 MPa, and it was considerably higher than the tensile strength of pristine BC (59 MPa).…”

Section: Production and Properties Of Bc Composites With Silver Nanopmentioning

confidence: 99%

“…A number of studies report successful uses of plant extracts as reducing agents for silver ions. In a study by L. Muthulakshmi et al [19], copper nanoparticles (CuNPs) were generated in situ inside cellulose matrix using Terminalia catappa leaf extract as a reducing agent, and their properties were investigated. The composite films possessed sufficient tensile strength, and, thus, they can replace polymer packaging materials like polyethylene.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial properties of films of cellulose composites with silver nanoparticles and antibiotics

et al. 2018

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The present study describes production of bacterial cellulose composites with silver nanoparticles and antibiotics and compares their properties. Bacterial cellulose (BC) composites synthesized in the culture of the strain of acetic acid bacterium Komagataeibacter xylinus VKPM B-12068 with silver nanoparticles, BC/AgNps, were produced hydrothermally, under different AgNO 3 concentrations (0.0001, 0.001, and 0.01 M) in the reaction medium. The presence of silver in the BC/AgNp composites was confirmed by elemental analysis conducted using scanning electron microscopy with a system of X-ray spectral analysis. Analysis showed that the average atomic number of silver particles in composite samples depended on the concentration of AgNO 3 : as AgNO 3 concentration in the reaction solution was increased, silver content in the composites increased from 0.044 to 0.37 mg/cm 2. BC composites with amikacin and ceftriaxone were prepared by immersing dry BC films in solutions containing different concentrations of the antibiotics. The surface structure and properties and physicochemical and mechanical characteristics of composites were investigated using SEM, DSC, X-ray analysis, the system for measuring water contact angles, and electromechanical tensile testing machine. The disk-diffusion method and the shake-flask culture method used in this study showed that all experimental composites had pronounced antibacterial activity against E. coli, Ps. eruginosa, K. pneumoniae, and St. aureus, and the BC/antibiotic composites were more active than BC/AgNp ones; S. aureus was the most susceptible to the effect of BC composites. No potential cytotoxicity was detected in any of the BC/AgNp composites in the NIH 3T3 mouse fibroblast cell culture, in contrast to the BC/antibiotic composites. These results suggest that BC composites constructed in the present study hold promise as dressings for managing wounds, including contaminated ones.

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“…It has been found that Terminalia catappa leaf extract (TCE) contains alkaloids, celluloses, flavonoids, lignins, triterpenoids, as principal bio-actives molecules, which can be regarded for their anticancer, antibacterial, and antioxidant activities [ 14 , 15 , 16 , 17 , 18 ]. The bio-active compounds present in T. catappa leaf extract (TCE) were reported as an excellent recipe for TCE mediated bio-reduction of Au 4+ , Cu 2+ , Ti 4+ , and Nd 3+ to Au, Cu TiO 2 , and Nd 2 O 3 NPs, respectively, wherein the extract functions as an excellent reducing and stabilizing agent [ 19 , 20 , 21 , 22 , 23 ]. However, despite the above reported protocols employed for the nanoscale fabrication of various metallic salts, silver which is usually the first choice among metallic nanomaterial fabrication due to its well-established microbicidal property, is yet to be prepared at nanoscale using T. catappa leaf extract (TCE) [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Counteraction of Biofilm Formation and Antimicrobial Potential of Terminalia catappa Functionalized Silver Nanoparticles against Candida albicans and Multidrug-Resistant Gram-Negative and Gram-Positive Bacteria

et al. 2021

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Biofilms not only protect bacteria and Candida species from antibiotics, but they also promote the emergence of drug-resistant strains, making eradication more challenging. As a result, novel antimicrobial agents to counteract biofilm formation are desperately needed. In this study, Terminalia catappa leaf extract (TCE) was used to optimize the TCE-capped silver nanoparticles (TCE-AgNPs) via a one-pot single-step method. Varied concentrations of TCE have yielded different sized AgNPs. The physico-chemical characterization of TCE-AgNPs using UV-Vis, SEM, TEM, FTIR, and Raman spectroscopy have confirmed the formation of nanostructures, their shape and size and plausible role of TCE bio-active compounds, most likely involved in the synthesis as well as stabilization of NPs, respectively. TCE-AgNPs have been tested for antibiofilm and antimicrobial activity against multidrug-resistant Pseudomonas aeruginosa (MDR-PA), methicillin-resistant Staphylococcus aureus (MRSA), and Candida albicans using various microbiological protocols. TCE-Ag-NPs−3 significantly inhibits biofilm formation of MDR-PA, MRSA, and C. albicans by 73.7, 69.56, and 63.63%, respectively, at a concentration of 7.8 µg/mL, as determined by crystal violet microtiter assay. Furthermore, SEM micrograph shows that TCE-AgNPs significantly inhibit the colonization and adherence of biofilm forming cells; individual cells with loss of cell wall and membrane integrity were also observed, suggesting that the biofilm architecture and EPS matrix were severely damaged. Moreover, TEM and SEM images showed that TCE-AgNPs brutally damaged the cell wall and membranes of MDR-PA, MRSA, and C. albicans. Additionally, extreme ultrastructural changes such as deformation, disintegration, and separation of cell wall and membrane from the cells, have also been observed, indicating significant loss of membrane and cell wall integrity, which eventually led to cell death. Overall, the research revealed a simple, environmentally friendly, and low-cost method for producing colloidal TCE-AgNPs with promising applications in advanced clinical settings against broad-spectrum biofilm-forming antibiotic-resistant bacteria and candida strains.

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Preparation and properties of cellulose nanocomposite films with in situ generated copper nanoparticles using Terminalia catappa leaf extract

Cited by 76 publications

References 12 publications

Phytochemical Process for the Functionalization of Materials with Metal Nanoparticles: Current Trends and Future Perspectives

Phytochemical Process for the Functionalization of Materials with Metal Nanoparticles: Current Trends and Future Perspectives

Antibacterial properties of films of cellulose composites with silver nanoparticles and antibiotics

Counteraction of Biofilm Formation and Antimicrobial Potential of Terminalia catappa Functionalized Silver Nanoparticles against Candida albicans and Multidrug-Resistant Gram-Negative and Gram-Positive Bacteria

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