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

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1172 ◽  
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.

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

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1594 ◽  
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.

Preparation and characterization of a dialdehyde starch crosslinked feather keratin film for food packaging application

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 27168-27174 ◽  
Author(s):  
Yao Dou ◽  
Xue Huang ◽  
Buning Zhang ◽  
Ming He ◽  
Guoqiang Yin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Vapor ◽  
Food Packaging ◽  
Water Resistance ◽  
Barrier Property ◽  
Dialdehyde Starch ◽  
Water Vapor Barrier ◽  
Feather Keratin

Crosslink effects of dialdehyde starch on the mechanical properties, water-resistance, compatability, micromorphology, and water vapor barrier property of feather keratin films.

scholarly journals The Physicochemical and Antibacterial Properties of Chitosan-Based Materials Modified with Phenolic Acids Irradiated by UVC Light

2021 ◽  
Vol 22 (12) ◽  
pp. 6472
Author(s):  
Beata Kaczmarek-Szczepańska ◽  
Marcin Wekwejt ◽  
Olha Mazur ◽  
Lidia Zasada ◽  
Anna Pałubicka ◽  
...  
Keyword(s):  
Thin Films ◽  
Antimicrobial Activity ◽  
Ferulic Acid ◽  
Phenolic Acid ◽  
Food Packaging ◽  
Antibacterial Properties ◽  
Force Microscopy ◽  
Atomic Force ◽  
Before And After

This paper concerns the physicochemical properties of chitosan/phenolic acid thin films irradiated by ultraviolet radiation with wavelengths between 200 and 290 nm (UVC) light. We investigated the preparation and characterization of thin films based on chitosan (CTS) with tannic (TA), caffeic (CA) and ferulic acid (FA) addition as potential food-packaging materials. Such materials were then exposed to the UVC light (254 nm) for 1 and 2 h to perform the sterilization process. Different properties of thin films before and after irradiation were determined by various methods such as Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), differential scanning calorimeter (DSC), mechanical properties and by the surface free energy determination. Moreover, the antimicrobial activity of the films and their potential to reduce the risk of contamination was assessed. The results showed that the phenolic acid improving properties of chitosan-based films, short UVC radiation may be used as sterilization method for those films, and also that the addition of ferulic acid obtains effective antimicrobial activity, which have great benefit for food packing applications.

Effect of Acid Modification on the Properties of Potato Starch Pastes and Starch Film

2011 ◽  
Vol 287-290 ◽  
pp. 2648-2651
Author(s):  
Wen Yu Wang ◽  
Xin Jin ◽  
Shuan Qing Hou ◽  
Yu Feng Zhang ◽  
Xiao Xu Sha
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Treatment Time ◽  
Potato Starch ◽  
Amorphous Region ◽  
Starch Granules ◽  
Acid Modification ◽  
Crystallization Region ◽  
Starch Films

The effect of acid modification using 1mol/L HCl on viscosity, thermal properties and mechanical properties of potato starch pastes and starch film were investigated. After acid modification, the surface of starch granules did not show more roughness and viscosity of starch pastes become lower. The results of DSC indicated that acid should act on amorphous region of starch firstly and would act on the crystallization region with the longer treatment time. In the very close viscosity scope, the mechanical properties of starch films were increased obviously after acid modification.

scholarly journals Elaboration and Characterization of Active Apple Starch Films Incorporated with Ellagic Acid

Coatings ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 384
Author(s):  
Juan Tirado-Gallegos ◽  
Paul Zamudio-Flores ◽  
José Ornelas-Paz ◽  
Claudio Rios-Velasco ◽  
Guadalupe Olivas Orozco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Vapor ◽  
Antioxidant Capacity ◽  
Ellagic Acid ◽  
Uv Light ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Starch Films

Apple starch films were obtained from apples harvested at 60, 70, 80 and 90 days after full bloom (DAFB). Mechanical properties and water vapor permeability (WVP) were evaluated. The apple starch films at 70 DAFB presented higher values in the variables of tensile strength (8.12 MPa), elastic modulus (3.10 MPa) and lower values of water vapor permeability (6.77 × 10−11 g m−1 s−1 Pa−1) than apple starch films from apples harvested at 60, 80 and 90 DAFB. Therefore, these films were chosen to continue the study incorporating ellagic acid (EA). The EA was added at three concentrations [0.02% (FILM-EA0.02%), 0.05% (FILM-EA0.05%) and 0.1% (FILM-EA0.1%) w/w] and compared with the apple starch films without EA (FILM-Control). The films were characterized by their physicochemical, optical, morphological and mechanical properties. Their thermal stability and antioxidant capacity were also evaluated. The FILM-Control and FILM-EA0.02% showed a uniform surface, while FILM-EA0.05% and FILM-EA0.1% showed a rough surface and insoluble EA particles. Compared to FILM-Control, EA modified the values of tensile strength, elasticity modulus and elongation at break. The antioxidant capacity increased as EA concentration did. EA incorporation allowed obtaining films with higher antioxidant capacity, capable of blocking UV light with better mechanical properties than film without EA.

scholarly journals Nanofluid to Nanocomposite Film: Chitosan and Cellulose-Based Edible Packaging

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 660
Author(s):  
Mekro Permana Pinem ◽  
Endarto Yudo Wardhono ◽  
Frederic Nadaud ◽  
Danièle Clausse ◽  
Khashayar Saleh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Film Thickness ◽  
Food Packaging ◽  
Water Resistance ◽  
Film Formation ◽  
Prepared Film ◽  
Particle Form ◽  
Edible Packaging ◽  
Biocomposite Film

Chitosan (CH)-based materials are compatible to form biocomposite film for food packaging applications. In order to enhance water resistance and mechanical properties, cellulose can be introduced to the chitosan-based film. In this work, we evaluate the morphology and water resistance of films prepared from chitosan and cellulose in their nanoscale form and study the phenomena underlying the film formation. Nanofluid properties are shown to be dependent on the particle form and drive the morphology of the prepared film. Film thickness and water resistance (in vapor or liquid phase) are clearly enhanced by the adjunction of nanocrystalline cellulose.

scholarly journals Functional and structural basis of E. coli enolase inhibition by SF2312: a mimic of the carbanion intermediate

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jolanta Krucinska ◽  
Michael N. Lombardo ◽  
Heidi Erlandsen ◽  
Akram Hazeen ◽  
Searle S. Duay ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Antibacterial Properties ◽  
High Energy ◽  
Structural Basis ◽  
Gram Negative Bacteria ◽  
E Coli ◽  
Promising Target ◽  
Antibiotic Discovery ◽  
Growth And Reproduction

AbstractMany years ago, the natural secondary metabolite SF2312, produced by the actinomycete Micromonospora, was reported to display broad spectrum antibacterial properties against both Gram-positive and Gram-negative bacteria. Recent studies have revealed that SF2312, a natural phosphonic acid, functions as a potent inhibitor of human enolase. The mechanism of SF2312 inhibition of bacterial enolase and its role in bacterial growth and reproduction, however, have remained elusive. In this work, we detail a structural analysis of E. coli enolase bound to both SF2312 and its oxidized imide-form. Our studies support a model in which SF2312 acts as an analog of a high energy intermediate formed during the catalytic process. Biochemical, biophysical, computational and kinetic characterization of these compounds confirm that altering features characteristic of a putative carbanion (enolate) intermediate significantly reduces the potency of enzyme inhibition. When SF2312 is combined with fosfomycin in the presence of glucose-6 phosphate, significant synergy is observed. This suggests the two agents could be used as a potent combination, targeting distinct cellular mechanism for the treatment of bacterial infections. Together, our studies rationalize the structure-activity relationships for these phosphonates and validate enolase as a promising target for antibiotic discovery.

Improvement in Food Packaging Industry with Biobased Nanocomposites

2007 ◽  
Vol 3 (4) ◽  
Author(s):  
Zahra Akbari ◽  
Talat Ghomashchi ◽  
Shahin Moghadam
Keyword(s):  
Mechanical Properties ◽  
Food Packaging ◽  
Gas Permeability ◽  
Edible Films ◽  
Edible Film ◽  
Comprehensive Review ◽  
General Review ◽  
Flexible Packaging ◽  
Packaging Industry ◽  
New Challenges

Nanotechnology will become one of the most powerful forces for innovation in the food packaging industry. One such innovation is biobased nanocomposite technology, which holds the key to future advances in flexible packaging. Biobased nanocomposites are produced from incorporation of nanoclay into biopolymers (or Edible films). Advantages of biobased nanocomposites are numerous and possibilities for application in the packaging industry are endless. A comprehensive review of biobased nanocomposite applications in food packaging industry should be necessary because nanotechnology is changing rapidly and the food packaging industry is facing new challenges. This provides a general review of previous works. Many of the works reported in the literature are focused on the production and the mechanical properties of the biobased nanocomposites. Little attention has been paid to gas permeability of biobased nanocomposites. In regard to extensive research on Edible film, this article suggests investigating the replacement of biobased nanocomposites instead of Edible films in different areas of food packaging.

scholarly journals Preparation and Characterization of Chitosan Nanocomposite Based on Nanoscale Silver and Nanomontmorillonite

2019 ◽  
Vol 2 (2) ◽  
pp. 5-12 ◽  
Author(s):  
Fatemeh- Sadat Ebnerasool ◽  
Negar Motakef Kazemi
Keyword(s):  
Food Packaging ◽  
Solution Method ◽  
In Situ Synthesis ◽  
Diffusion Method ◽  
X Ray ◽  
E Coli ◽  
Packaging Industry ◽  
Scanning Electron

The chitosan nanocomposites were rapidly prepared by simple solution method. This biopolymer matrix was modified by prepared nanoscale silver (Ag) using in situ synthesis from precursor and nanomontmorillonite (NMMT). The samples were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), and energy dispersive x-ray spectroscopy (EDX). The water vapor properties (WVP) of nanocomposites were investigated using gravimetric standard. The antibacterial activity of nanocomposite was measured by the well diffusion method on Muller–Hinton Agar against Escherichia coli (E. coli) by zone inhibition. Based on the obtained results, the nanocomposite can have a good candidate for different applications and food packaging industry.

scholarly journals Utilization Of Sugarcane Bagasse Cellulose-Clay Nanocomposite As A Biodegradable And Antibacterial Packaging Material To Extend The Food's Shelf Life

Khazanah ◽  
2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Nadya Fitriani Pitaloka ◽  
◽  
Ardilla Sriwijayanti ◽  
Santi Anisa ◽  
Irne Dyah Ayu Wijayanti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Antibacterial Activity ◽  
Water Vapor ◽  
Shelf Life ◽  
Sugarcane Bagasse ◽  
Toxicity Test ◽  
Nanocomposite Film ◽  
Food Packaging ◽  
Antibacterial Properties ◽  
Vapor Permeability

Food packaging materials derived from fossil fuels are single-use products that harm the health of living things when disposed of by releasing toxic byproducts. Many communities are starting to be more environmentally friendly by using biopolymers. However, some biopolymers do not have antibacterial properties, thus shortening the food’s shelf life and not applicable in food packaging. Therefore, the purpose of this work is to develop a biodegradable and antimicrobial food packaging from sugarcane bagasse and clay that degrades over time without compromising the food’s shelf life. Cellulose acetate butyrate (cab) was prepared in an amimcl ionic liquid system from sugarcane bagasse. Then the cab was plasticized using peg, resulting a film. Besides, montmorillonite (mmt) clay was modified with aryl ammonium cations using a cation exchange technique to form bmmt. The nanocomposite film was prepared by mixing the plasticized cab and bmmt, then heated at 50c to evaporate the solution. The nanocomposite film was obtained as a prototype of food packaging. Several tests were conducted including mechanical properties, water vapor permeability (wvp), antimicrobial and toxicity test. Based on research by saha et.al, 2008, the nanocomposite film with the cag, peg and bmmt 100:20:3 composition gave the best mechanical properties because of the agglomeration of bmmt. Also, the nanocomposite film had promising wvp properties as a plastic because the clay layers reduced the water vapor diffusion across the polymer matrix. The toxicity test showed that this nanocomposite film was compatible in human blood. Lastly, this nanocomposite film has antibacterial activity against b. Subtilis and p. Cepacia because of the bmmt presence. In conclusion, the nanocomposite film from sugarcane bagasse and clay containing cag, peg and bmmt 100:20:3 is a promising material for a biodegradable and antimicrobial food packaging, because it has sufficient mechanical properties, antibacterial activity, low wvp and is non-toxic.

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