Study on antibacterial papermaking for food packaging using rice straw nanocellulose and nanochitosan

Abstract In this study, the antibacterial bleached hardwood kraft pulp-based paper sheets with a base weight of around 125 g/m2 were made with surface sizing by a mixture of oxidated starch and additives from acetic acid-treated nanochitosan and nanocellulose prepared from limited hydrolysis of rice straw by dilute sulfuric acid with added hydrogen peroxide. The characteristics of nanomaterials were analyzed by SEM and XRD. The barrier and antibacterial properties of paper were investigated to assess their ability to contain liquid and food products. Using the sizing mixture which has a solids content of 8% with additives improved the mechanical strength of the paper. The best value of tearing strength of 18.94 mN.m2/g was obtained with adding of 0.5% of nanocellulose and 1.5% of nanochitosan. The burst index of paper reached its highest value of 5.07 kP.m2/g when both nanocellulose and nanochitosan were used at the dosages of 1.0%. The antibacterial features on E. coli clearly showed in papers with 2% of nanochitosan or with the mixture of 1% nanocellulose and 1% nanochitosan addition.

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TRANSFORMATION OF ETHYL-P-METHOXYCINNAMATE TO P –METHOXYCINNAMIC ACID FROM KENCUR (Kaempheria galanga L.) AND THEIR ANTIBACTERIAL ACTIVITY

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.13.2.8472.176-190 ◽

2017 ◽

Vol 13 (2) ◽

pp. 176

Author(s):

Muhamad Salman Fareza ◽

Rehana Rehana ◽

Nuryanti Nuryanti ◽

Didin Mujahidin

Keyword(s):

Antibacterial Activity ◽

Antibacterial Properties ◽

Separation And Purification ◽

E Coli ◽

H Nmr ◽

Alkaline Conditions ◽

Methoxycinnamic Acid ◽

Vacuum Liquid Chromatography ◽

Hydrolysis Of ◽

C Nmr

This study aimed to evaluate the antibacterial properties of ethyl-p-methoxycinnamate and p-methoxycinnamate acid from Kaempheria galanga L. Ethyl-p-methoxycinnamate was isolated from the n-hexane rhizome extract of Kaempheria galanga L. Separation and purification of this compound was carried out with vacuum liquid chromatography and column chromatography. Hydrolysis of ethyl-p-methoxycinnamic under alkaline conditions obtained p-methoxycinnamic acid with a good yield of 85 %. The structure of the compounds were charactrized with IR, NMR spectrophotometer (1H-NMR and 13C-NMR) and mass spectrophotometer. The antibacterial properties of the compounds were evaluated using microdilution methods against B. cereus ATCC 11778, L. monocytogenes ATCC 7644, E. coli ATCC 25922, S. enterica sv Typhimurium ATCC 14028, and E. aerogenes ATCC 13048. The compounds showed weak antibacterial properties. Only ethyl p-methoxycinnamate showed the strongest antibacterial activity, especially against B. cereus ATCC 11778 bacteria with MIC values of 62.5 mg /mL. The change of the functional groups provided no significant impact on the antibacterial activity.

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The Importance of Porins and β-Lactamase in Outer Membrane Vesicles on the Hydrolysis of β-Lactam Antibiotics

International Journal of Molecular Sciences ◽

10.3390/ijms21082822 ◽

2020 ◽

Vol 21 (8) ◽

pp. 2822 ◽

Cited By ~ 2

Author(s):

Si Won Kim ◽

Jung Seok Lee ◽

Seong Bin Park ◽

Ae Rin Lee ◽

Jae Wook Jung ◽

...

Keyword(s):

Outer Membrane ◽

Defense Mechanisms ◽

Antibacterial Properties ◽

Membrane Vesicles ◽

Outer Membrane Vesicles ◽

E Coli ◽

Lactam Antibiotic ◽

Hydrolysis Of ◽

Degradation Ability

Gram-negative bacteria have an outer membrane inhibiting the entry of antibiotics. Porins, found within the outer membrane, are involved in regulating the permeability of β-lactam antibiotics. β-lactamases are enzymes that are able to inactivate the antibacterial properties of β-lactam antibiotics. Interestingly, porins and β-lactamase are found in outer membrane vesicles (OMVs) of β-lactam-resistant Escherichia coli and may be involved in the survival of susceptible strains of E. coli in the presence of antibiotics, through the hydrolysis of the β-lactam antibiotic. In this study, OMVs isolated from β-lactam-resistant E. coli and from mutants, lacking porin or β-lactamase, were evaluated to establish if the porins or β-lactamase in OMVs were involved in the degradation of β-lactam antibiotics. OMVs isolated from E. coli deficient in β-lactamase did not show any degradation ability against β-lactam antibiotics, while OMVs lacking OmpC or OmpF showed significantly lower levels of hydrolyzing activity than OMVs from parent E. coli. These data reveal an important role of OMVs in bacterial defense mechanisms demonstrating that the OmpC and OmpF proteins allow permeation of β-lactam antibiotics into the lumen of OMVs, and antibiotics that enter the OMVs can be degraded by β-lactamase.

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Safely Dissolvable and Healable Active Packaging Films Based on Alginate and Pectin

Polymers ◽

10.3390/polym11101594 ◽

2019 ◽

Vol 11 (10) ◽

pp. 1594 ◽

Cited By ~ 9

Author(s):

Maziyar Makaremi ◽

Hosnieh Yousefi ◽

Giuseppe Cavallaro ◽

Giuseppe Lazzara ◽

Calvin Bok Sun Goh ◽

...

Keyword(s):

Mechanical Properties ◽

Morphological Study ◽

Food Packaging ◽

Antibacterial Properties ◽

Packaging Material ◽

Packaging Films ◽

E Coli ◽

Biocomposite Films ◽

Healing Efficiency ◽

Potential Applications

Extensive usage of long-lasting petroleum based plastics for short-lived application such as packaging has raised concerns regarding their role in environmental pollution. In this research, we have developed active, healable, and safely dissolvable alginate-pectin based biocomposites that have potential applications in food packaging. The morphological study revealed the rough surface of these biocomposite films. Tensile properties indicated that the fabricated samples have mechanical properties in the range of commercially available packaging films while possessing excellent healing efficiency. Biocomposite films exhibited higher hydrophobicity properties compared to neat alginate films. Thermal analysis indicated that crosslinked biocomposite samples possess higher thermal stability in temperatures below 120 °C, while antibacterial analysis against E. coli and S. aureus revealed the antibacterial properties of the prepared samples against different bacteria. The fabricated biodegradable multi-functional biocomposite films possess various imperative properties, making them ideal for utilization as packaging material.

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Preparation and Characterization of Potato Starch Film with Various Size of Nano-SiO2

Polymers ◽

10.3390/polym10101172 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1172 ◽

Cited By ~ 16

Author(s):

Rongfei Zhang ◽

Xiangyou Wang ◽

Meng Cheng

Keyword(s):

Mechanical Properties ◽

Food Packaging ◽

Water Resistance ◽

Gas Permeability ◽

Potato Starch ◽

Antibacterial Properties ◽

E Coli ◽

Nano Sio2 ◽

Starch Films

The various sizes (15, 30, 80, and 100 nm) of nano-SiO2/potato starch films were synthesized and characterized. The gas permeability, antibacterial properties, and mechanical properties of the films were evaluated to their potential for application as food packaging materials. Results indicated that the 100 nm nano-SiO2 was well dispersed in the starch matrix, which induced an active group on the surface of 100 nm nano-SiO2 adequately combined with starch macromolecule. The water resistance and mechanical properties of the films were improved with the addition of nano-SiO2. Notably, resistance to ultraviolet and thermal aging was also enhanced. The nano-SiO2/potato starch films were more efficient against Escherichia coli (E. coli) than Staphylococcus aureus (S. aureus). Remarkable preservation properties of the films packaging the white mushrooms were obtained, with those of the 100 nm films considered superior. This study can significantly guide the rational choice of the nano-SiO2 size to meet the packaging requirements of various agricultural products.

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Physico-Mechanical and Antibacterial Properties of PLA/TiO2 Composite Materials Synthesized via Electrospinning and Solution Casting Processes

Coatings ◽

10.3390/coatings9080525 ◽

2019 ◽

Vol 9 (8) ◽

pp. 525 ◽

Cited By ~ 14

Author(s):

Shiyi Feng ◽

Feng Zhang ◽

Saeed Ahmed ◽

Yaowen Liu

Keyword(s):

Water Vapor ◽

Food Packaging ◽

Water Solubility ◽

Antibacterial Properties ◽

Water Vapor Permeability ◽

Vapor Permeability ◽

Solution Casting ◽

Water Contact ◽

E Coli ◽

Composites Materials

In this study, PLA/TiO2 composites materials were prepared via electrospinning and solution casting processes. By testing the mechanical properties, water contact angle, water vapor permeability, and solubility of the composite nanofibers and films, the comprehensive performances of the two types of nanocomposites were analyzed. The results show that maximum tensile strengths of 2.71 ± 0.11 MPa and 14.49 ± 0.13 MPa were achieved for the nanofibers and films at a TiO2 content of 0.75 wt.%. Moreover, the addition of TiO2 significantly cut down the water vapor transmittance rate of the nanofibers and films while significantly improving the water solubility. Further, the antibacterial activity increased under UV-A irradiation for a TiO2 nanoparticle content of 0.75 wt.%, and the nanofiber and films exhibited inhibition zones of 4.86 ± 0.50 and 3.69 ± 0.40 mm for E. coli, and 5.98 ± 0.77 and 4.63 ± 0.45 mm for S. aureus, respectively. Overall, the performance of the nanofiber was better than that of the film. Nevertheless, both the nanocomposite membranes satisfied the requirements of food packaging materials.

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Gelatin-Based Film Integrated with Copper Sulfide Nanoparticles for Active Packaging Applications

Applied Sciences ◽

10.3390/app11146307 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6307

Author(s):

Swarup Roy ◽

Jong-Whan Rhim

Keyword(s):

Antibacterial Activity ◽

Copper Sulfide ◽

Biomedical Applications ◽

Food Packaging ◽

Composite Films ◽

Antibacterial Properties ◽

Barrier Properties ◽

Gelatin Film ◽

E Coli ◽

Water Vapor Barrier

Gelatin-based multifunctional composite films were prepared by reinforcing various amounts of copper sulfide nanoparticles (CuSNP, 0.0, 0.5, 1.0, and 2.0 wt %), and the effect of CuSNP on the film was evaluated by analyzing its physical and antibacterial properties. CuSNP makes a compatible film with gelatin. The inclusion of CuSNP significantly enhanced the UV blocking, mechanical strength, and water vapor barrier properties of the gelatin film. The inclusion of CuSNP of 1.0 wt % or less did not affect the transparency of the gelatin film. When 2.0 wt % of CuSNP was mixed, the hydrophilicity of the gelatin film did not change noticeably, but its thermal properties slightly increased. Moreover, the gelatin/CuSNP composite film presented effective antibacterial activity against E. coli and some activity against L. monocytogenes. Gelatin/CuSNP composite films with better functional and physical properties can be used for food packaging or biomedical applications.

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Evaluation of Long–Lasting Antibacterial Properties and Cytotoxic Behavior of Functionalized Silver-Nanocellulose Composite

Materials ◽

10.3390/ma14154198 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4198

Author(s):

Roberta Grazia Toro ◽

Abeer Mohamed Adel ◽

Tilde de Caro ◽

Fulvio Federici ◽

Luciana Cerri ◽

...

Keyword(s):

Food Packaging ◽

Antibacterial Properties ◽

Morphological Characterization ◽

Mouse Embryonic Fibroblasts ◽

Embryonic Fibroblasts ◽

E Coli ◽

Bacteria Inhibition ◽

High Cytotoxicity ◽

20 Nm

Materials possessing long-term antibacterial behavior and high cytotoxicity are of extreme interest in several applications, from biomedical devices to food packaging. Furthermore, for the safeguard of the human health and the environment, it is also stringent keeping in mind the need to gather good functional performances with the development of ecofriendly materials and processes. In this study, we propose a green fabrication method for the synthesis of silver nanoparticles supported on oxidized nanocellulose (ONCs), acting as both template and reducing agent. The complete structural and morphological characterization shows that well-dispersed and crystalline Ag nanoparticles of about 10–20 nm were obtained in the cellulose matrix. The antibacterial properties of Ag-nanocomposites (Ag–ONCs) were evaluated through specific Agar diffusion tests against E. coli bacteria, and the results clearly demonstrate that Ag–ONCs possess high long-lasting antibacterial behavior, retained up to 85% growth bacteria inhibition, even after 30 days of incubation. Finally, cell viability assays reveal that Ag-ONCs show a significant cytotoxicity in mouse embryonic fibroblasts.

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Effects of Heat Treatment and Tea Polyphenols on the Structure and Properties of Polyvinyl Alcohol Nanofiber Films for Food Packaging

Coatings ◽

10.3390/coatings10010049 ◽

2020 ◽

Vol 10 (1) ◽

pp. 49

Author(s):

Jinjie Luo ◽

Duquan Zuo ◽

Zhenghua Deng ◽

Anping Ji ◽

Guofeng Xia

Keyword(s):

Heat Treatment ◽

Polyvinyl Alcohol ◽

Food Packaging ◽

Antibacterial Properties ◽

Tea Polyphenols ◽

Compact Structure ◽

Elongation At Break ◽

E Coli ◽

Nanofiber Film ◽

And Staphylococcus Aureus

In this study, biodegradable polyvinyl alcohol (PVA) was blended with natural antioxidant tea polyphenols (TPs) to produce PVA/TP nanofiber films by electrospinning. The effects of heat treatment and TP incorporation on the structural and physical properties of the films were then evaluated. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) revealed that the PVA/TP nanofiber film has a more compact structure and better morphology than PVA alone. In addition, the water resistance was enhanced, and the formation of hydrogen bonds between the TP and PVA molecules increased via the heat treatment. Furthermore, the mechanical, antioxygenic, and antibacterial properties of the nanofiber films were significantly improved (P < 0.05) owing to the incorporation of TP. In particular, when the mass ratio of the PVA/TP was 7:3, the elongation at break (EAB) of the film increased to 105.24% ± 2.87%, and the antioxidant value reached a maximum at 64.83% ± 5.21%. In addition, the antibacterial activity of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) increased to the maximum levels of 82.48% ± 2.12% and 86.25% ± 2.32%, respectively. In summary, our study produced a functional food packaging material that includes preservation with an acceptable bioactivity, ability to keep food fresh, and biodegradability.

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Degradable and Photocatalytic Antibacterial Au-TiO2/Sodium Alginate Nanocomposite Films for Active Food Packaging

Nanomaterials ◽

10.3390/nano8110930 ◽

2018 ◽

Vol 8 (11) ◽

pp. 930 ◽

Cited By ~ 12

Author(s):

Siying Tang ◽

Zhe Wang ◽

Penghui Li ◽

Wan Li ◽

Chengyong Li ◽

...

Keyword(s):

Composite Film ◽

Sodium Alginate ◽

Light Absorption ◽

Food Packaging ◽

Antibacterial Properties ◽

Nanocomposite Films ◽

Water Contact ◽

E Coli ◽

Active Food Packaging ◽

Application Potential

A degradable and antibacterial sodium alginate film containing functional Au-TiO2 nanocomposites for food packaging was successfully developed. The Au-TiO2 nanocomposites are synthesized hydrothermally and mixed with the alginate solution to form the film by a casting method. The Au-TiO2 nanocomposites enable the film with excellent visible light absorption and transfer ability with the light absorption rang covering UV–visible wavelength (300–800 nm) and induce the increase of the film water contact angle from 40° to 74°, which contributes to the film shape stability. Furthermore, compared to the TiO2 nanoparticle-incorporated film, the antibacterial ability of Au-TiO2/sodium alginate composite film is improved approximately by 60% and 50% against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli), respectively, in light conditions. The antibacterial property of the film arises from the increased production of reactive oxygen species (ROS) induced by the surface plasmonic resonance of Au nanoparticles. The degradable and antibacterial properties render the composite film of great application potential in food packaging industry.

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Antibacterial effect of Ag nanoparticles into the paper coatings

Nordic Pulp & Paper Research Journal ◽

10.1515/npprj-2019-0034 ◽

2019 ◽

Vol 34 (4) ◽

pp. 507-515 ◽

Cited By ~ 2

Author(s):

Emine Arman Kandirmaz ◽

Arif Ozcan

Keyword(s):

Ag Nanoparticles ◽

Chemical Structure ◽

Food Packaging ◽

Antibacterial Effect ◽

Antibacterial Properties ◽

Printing Industry ◽

Paper Coating ◽

E Coli ◽

Paper Coatings ◽

Infrared Spectrophotometer

Abstract Food packaging is the most important output of the printing industry. Giving antibacterial effect to the papers used in food packaging will extend the shelf life of the product and food transfer in healthier conditions. The nanoparticles with known antibacterial activity are nanosilver, nanogold, nanosilica. Binders used in paper coating provide a good nutrient medium for bacteria. In this study, Ag nanoparticles was first synthesized as monodisperse in 10 nm size with polyvinyl pyrrolidone and sodium boron reaction which will give antibacterial properties to paper coatings. The chemical structure of the synthesized Ag nanoparticles is illuminated by fourier transform infrared spectrophotometer (FTIR). Different paper coating formulations containing varying amounts of Ag nanoparticles were prepared with starch binder. Using these mixtures; papers coated with a laboratory-type paper coating machine onto 80 g/m2 paper. Color, gloss, contact angle, surface energy, antibacterial properties of the paper against the E. coli bacteria and S. aureus bacteria were examined. As a result, Ag nanoparticles has been successfully synthesized and used in paper coating. Antibacterial and printability properties were improved by increasing the amount of Ag nanoparticles.

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