scholarly journals The Effects of Silver Nanoparticles Compositions on the Mechanical, Physiochemical, Antibacterial, and Morphology Properties of Sugar Palm Starch Biocomposites for Antibacterial Coating

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2605 ◽  
Author(s):  
A. Rozilah ◽  
C. N. Aiza Jaafar ◽  
S. M. Sapuan ◽  
I. Zainol ◽  
R. A. Ilyas
Keyword(s):  
Silver Nanoparticles ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Microscopic Analysis ◽  
Decomposition Temperature ◽  
Gravimetric Analysis ◽  
Ftir Analysis ◽  
Antibacterial Coatings ◽  
Biocomposite Films

Antibacterial sugar palm starch biopolymer composite films were developed and derived from renewable sources and inorganic silver nanoparticles (AgNPs) as main ingredients for antibacterial coatings. The composite films were produced by solution casting method and the mechanical and physicochemical properties were determined by tensile test, Fourier Transform Infrared (FTIR) analysis, thermal gravimetric analysis (TGA), antibacterial screening test and field emission scanning electron microscopy (FESEM) images. It was found that mechanical and antibacterial properties of biocomposite films were improved after the addition of AgNPs compared with the film without active metals. The weakness of neat biocomposite films was improved by incorporating inorganic AgNPs as a nanofiller in the films’ matrix to avoid bacterial growth. The results showed that the tensile strength ranged between 8 kPa and 408 kPa and the elasticity modulus was between 5.72 kPa and 9.86 kPa. The addition of AgNPs in FTIR analysis decreased the transmittance value, caused small changes in the chemical structure, caused small differences in the intensity peaks, and produced longer wavelengths. These active films increased the degradation weight and decomposition temperature due to the more heat-stable AgNPs. Meanwhile, the average inhibited areas measured were between 7.66 and 7.83 mm (Escherichia coli), 7.5 and 8.0 mm (Salmonella cholerasuis), and 0.1 and 0.5 mm for Staphylococcus aureus. From the microscopic analysis, it was observed that the average size of all microbes for 1 wt% and 4 wt% AgNPs ranged from 0.57 to 2.90 mm. Overall, 3 wt% AgNP nanofiller was found to be the best composition that fulfilled all the mechanical properties and had better antimicrobial properties. Thus, the development of an organic-inorganic hybrid of antibacterial biopolymer composite films is suitable for antibacterial coatings.

Comparison the Physical and Antimicrobial Properties of Poly(Lactic Acid) Film and its Composites with ZnO Nanoparticles

2018 ◽  
Vol 772 ◽  
pp. 100-104
Author(s):  
Tongsai Jamnongkan ◽  
Nareerat Kamlong ◽  
Nicha Thiangtrong ◽  
Rattanaphol Mongkholrattanasit
Keyword(s):  
Composite Films ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Poly Lactic Acid ◽  
Solvent Casting ◽  
Bacterial Strains ◽  
Zno Nps ◽  
Casting Technique ◽  
Good Antibacterial Activity ◽  
Biocomposite Films

Polylactic acid (PLA) is a bioplastic, which is produced from natural materials. It is well known that the PLA can be degraded in the environment which is alternatively rendered to replace the plastic from a petroleum base. In this paper, we study the physical properties of composite films prepared from PLA composited with zinc oxide nanoparticles (ZnO NPs) by using solvent casting technique. It was found that the ZnO NPs have affected to the morphological, water absorbency, mechanical and antibacterial properties of biocomposite films. In addition, we also found that the particles of ZnO NPs can disperse within the PLA matrices, which enhanced the stress and Young’s modulus of biocomposite films. Additionally, the result shown that the PLA/ZnO NPs films exhibit good antibacterial activity both in Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacterial strains.

scholarly journals Green Synthesis of Silver Nanoparticles by Extracellular Extracts from Aspergillus japonicus PJ01

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4479
Author(s):  
Pei-Jun Li ◽  
Jiang-Juan Pan ◽  
Li-Jun Tao ◽  
Xia Li ◽  
Dong-Lin Su ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Antibacterial Activities ◽  
Synthesis Process ◽  
Biological Synthesis ◽  
X Ray Diffraction ◽  
Aspergillus Japonicus ◽  
Transmission Electron ◽  
Naoh Solution

The present study focuses on the biological synthesis, characterization, and antibacterial activities of silver nanoparticles (AgNPs) using extracellular extracts of Aspergillus japonicus PJ01.The optimal conditions of the synthesis process were: 10 mL of extracellular extracts, 1 mL of AgNO3 (0.8 mol/L), 4 mL of NaOH solution (1.5 mol/L), 30 °C, and a reaction time of 1 min. The characterizations of AgNPs were tested by UV-visible spectrophotometry, zeta potential, scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric (TG) analyses. Fourier transform infrared spectroscopy (FTIR) analysis showed that Ag+ was reduced by the extracellular extracts, which consisted chiefly of soluble proteins and reducing sugars. In this work, AgNO3 concentration played an important role in the physicochemical properties and antibacterial properties of AgNPs. Under the AgNO3 concentration of 0.2 and 0.8 mol/L, the diameters of AgNPs were 3.8 ± 1.1 and 9.1 ± 2.9 nm, respectively. In addition, smaller-sized AgNPs showed higher antimicrobial properties, and the minimum inhibitory concentration (MIC) values against both E. coli and S. aureus were 0.32 mg/mL.

scholarly journals Fabrication and Analysis of EPDM-Buffing Dust Composite

2019 ◽  
Vol 9 (1) ◽  
pp. 913-919
Keyword(s):  
Decomposition Temperature ◽  
Low Density ◽  
Gravimetric Analysis ◽  
Phase Interaction ◽  
Ftir Analysis ◽  
Thermal Gravimetric ◽  
Low Weight ◽  
Tanning Process ◽  
Tannery Wastes ◽  
Main Component

Wastes generated during the tanning process can be categorized as buffing wastes, shaving wastes, keratin waste (mainly from the nails and hair) and skin trimmings. The main component of all these wastes is protein.in fact keratin is one type of protein. Leather waste from chrome tanned leather, which is proteinous, impregnated with chromium, synthetic fat, oil, tanning agents and dye chemicals is one of the difficult tannery wastes to manage. In this project, various leather- polymer- EPDM composites have been made and their properties have been analyzed. polymer-leather composite modified with filler material has showed good performance with high decomposition temperature, good bonding between the constituents and low density (Hence, low weight). The strong mechanical phase interaction brought by the chemical bonding with leather interface was confirmed by FTIR analysis. Thermal Gravimetric Analysis revealed the higher decomposition temperature for the composites.

scholarly journals Green synthesized silver nanoparticles loaded PVA/Starch cryogel scaffolds with antibacterial properties

2019 ◽  
Vol 13 (1) ◽  
pp. 1-6
Author(s):  
Didem Demir ◽  
Seda Ceylan ◽  
Gülşah Gül ◽  
Zeynep İyigündoğdu ◽  
Nimet Bölgen
Keyword(s):  
Tissue Engineering ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Composite Scaffold ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Infection Site ◽  
Engineering Applications ◽  
Aloe Barbadensis ◽  
Green Synthesized Silver Nanoparticles

In this study, Polyvinyl alcohol/Starch (PVA/Starch) cryogel scaffolds were combined with antibacterial silver nanoparticles (AgNPs), and the antimicrobial properties of composite scaffolds were determined for potential in tissue engineering applications. The porous PVA/Starch scaffolds were prepared by cryogelation technique. The nanoparticles were prepared by green synthesis from Aloe barbadensis leaf extract and characterized. The antibacterial, antifungal and antiyeast properties of AgNPs and AgNPs loaded PVA/Starch cryogel scaffolds were investigated. The highest antimicrobial activity of composite scaffold was found against Pseudomonas aeruginosa. Based on our studies, the results indicate that biodegradable, biocompatible and antimicrobial AgNPs loaded PVA/Starch scaffolds have potential to be used at an infection site in tissue engineering applications.

Preparation of Polymer Nanocomposites with Enhanced Antimicrobial Properties

2012 ◽  
Vol 1479 ◽  
pp. 57-62 ◽  
Author(s):  
Beatriz L. España-Sánchez ◽  
Carlos A. Ávila-Orta ◽  
Maria G. Neira-Velázquez ◽  
Silvia G. Solís-Rosales ◽  
Pablo González -Morones
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Argon Plasma ◽  
Surface Activation ◽  
Force Microscopy ◽  
Ion Collisions ◽  
Atomic Force ◽  
Uniform Dispersion ◽  
Dispersion Of Nanoparticles

ABSTRACTPlasma surface activation and antibacterial properties of nanocomposites of polypropylene/silver nanoparticles (PP/nAg) and nylon-6/silver nanoparticles (Ny6/nAg) were investigated. The nanocomposites were prepared by melt blending assisted by ultrasound, while surface activation was achieved by means of argon plasma. To evaluate the antimicrobial properties of the nanocomposites, pathogen microorganisms such as Pseudomonas aeruginosa and Aspergillus niger were tested. Scanning Electron Microscopy (SEM) analyses showed a uniform dispersion of nanoparticles within the polymer matrix, though the presence of some agglomerates was also appreciated. On the other hand, surface topography by Atomic Force Microscopy (AFM) suggested that ions from the argon plasma generated ion collisions with the surface of the nanocomposites removing or etching polymer from surface and improving silver nanoparticles exposure, increasing their antimicrobial properties as corroborated by antimicrobial analyses. Nanocomposites exposed to argon plasma presented higher antimicrobial properties than the ones not exposed. These results indicated that plasma treatment increased the contact area of the nanoparticles with the microorganisms and enhanced the antimicrobial properties of nanocomposites. The results also showed that PP/nAg nanocomposites presented higher bacterial inhibition than Ny6/nAg nanocomposites, indicating that the chemical structure of the polymer also plays a big role in the final performance of the composite.

Characterization and antibacterial properties of Eriobotrya japonica extract loaded silver-nanoparticles

2020 ◽  
Vol 16 ◽  
Author(s):  
Arfaa Sajid ◽  
Qaisar Manzoor ◽  
Anam Sajid ◽  
Muhammad Imran ◽  
Shanza Khalid ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Silver Ions ◽  
Eriobotrya Japonica ◽  
X Ray Diffraction ◽  
Effective Utilization ◽  
E Coli ◽  
Elongated Nanoparticles

Background:: Currently, developing methods for the formation of nanoparticles with antimicrobial properties based on green chemistry are the research hotspots. In this research green biosynthesis of Eriobotrya japonica extract loaded silver nanoparticles and their characterization were the main objectives to achieve. Methods:: Green synthesis of E. japonica leaves extract-loaded silver nanoparticles (AgNPs) was carried out and its effect on bacterial growth was examined. The reduction of silver ions in solution was observed using UV-Vis spectrophotometer. The properties of AgNPs were assessed using Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Also, their antibacterial effects were checked against Staphylococcus aureus and Escherichia coli. Results:: It was revealed that 5-50 nm sized spherical to elongated nanoparticles were synthesized that possessed comparatively better antibacterial potential against E. coli and S. aureus than conventional extract of the E. japonica leaves. Conclusions:: Green synthesis and effective utilization of Eriobotrya japonica extract loaded silver nanoparticles is a promising approach for nanoparticle production avoiding negative environmental impacts.

Modelling of sorbic acid diffusion through bacterial cellulose-based antimicrobial films

2012 ◽  
Vol 66 (2) ◽  
Author(s):  
Loredana-Mihaela Dobre ◽  
Anicuţa Stoica-Guzun ◽  
Marta Stroescu ◽  
Iuliana Jipa ◽  
Tǎnase Dobre ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Food Packaging ◽  
Sorbic Acid ◽  
Composite Films ◽  
Antimicrobial Properties ◽  
Antimicrobial Effect ◽  
Poly Vinyl Alcohol ◽  
Packaging Materials ◽  
Biocomposite Films ◽  
Swelling Rate

AbstractAntimicrobial packaging protects the product from the external environment and microbial contamination, conferring numerous advantages on human health. Interest in biopolymers as packaging materials has considerably increased recently. Bacterial cellulose is an interesting biomaterial produced as nanofibrils by Acetobacter xylinium and is a promising candidate due to its remarkable properties. New composite materials with antimicrobial properties were developed in this work, containing poly(vinyl alcohol) (PVA) as polymer matrix and ground bacterial cellulose (BC) as reinforcing fibres. Sorbic acid was used as an antimicrobial agent because it is a preservative recognised in the food industry. The materials obtained were studied using Fourier-transformed infrared spectroscopy (FTIR). The swelling rate of the composites was also measured. Release experiments of sorbic acid from the composite films into water were performed and the mass transfer phenomena were investigated using Fick’s law of diffusion. The antimicrobial effect was tested against Escherichia coli K12-MG1655. The results obtained indicated that the new biocomposite films could be promising antimicrobial food packaging materials.

Recent development on physical and biological properties of chitosan-based composite films with natural extracts: A review

2021 ◽  
pp. 088391152110142
Author(s):  
Lutfor Rahman ◽  
Jutika Goswami
Keyword(s):  
Molecular Weight ◽  
Biological Activities ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Biological Properties ◽  
Promising Candidate ◽  
Natural Extracts ◽  
Biocomposite Films ◽  
Recent Developments ◽  
Biomedical Fields

Being credited with the most extensively studied polysaccharide polymer and promising candidate for versatile applications, chitosan has proved to be a standalone material with loads of diversified properties in various structural forms such as blends and composites. Considering the abundance of this biopolymer and its non-toxic nature, exploiting chitosan offers two-folded benefits – environment friendliness and fabrication as per the need. Alkaline deacetylation of chitin produces chitosan as a polymer that can be tuned to a great extent as per the requirement by altering the degree of deacetylation (DDA) and molecular weight (MW). This biopolymer has been widely investigated for potential application in the food and biomedical fields due to its antimicrobial and antibacterial properties. Chitosan based composite films incorporated with different natural extracts have shown significant enhancement in the physical and biological activities as reported by different studies. The current study reviews recent developments and investigations of chitosan based biocomposite films incorporated with different natural extracts emphasizing on the improvement of physical and biological properties and its applications.

scholarly journals Influence of Incorporating Silver Nanoparticles in Protease Treatment on Fiber Friction, Antistatic, and Antibacterial Properties of Wool Fibers

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Hafeezullah Memon ◽  
Hua Wang ◽  
Sohail Yasin ◽  
Adeel Halepoto
Keyword(s):  
Silver Nanoparticles ◽  
Surface Morphology ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Fiber Surface ◽  
Ftir Analysis ◽  
Wool Fibers ◽  
Protease Treatment ◽  
Better Than ◽  
Effect Of Surface

This study was conducted by analyzing the effect of surface treatment on wool using varying percentages of protease (3%, 6%, and 9%) with incorporating silver nanoparticles and by varying pH (i.e., pH = 4 and pH = 7). The comparison of fiber surface morphology and the FTIR analysis was done to characterize the nanocoating. The results showed that the antistatic and antibacterial effect on the samples treated at 3% protease and 6% protease were better than the samples treated at 9% protease. Correspondingly, the samples treated at pH 4 had better antistatic and antibacterial properties than those treated at pH 7. Sulfur compounds play a key role in interaction and absorption of silver nanoparticles.

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