scholarly journals Development and Characterization of Cornstarch-Based Bioplastics Packaging Film Using a Combination of Different Plasticizers

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3487
Author(s):  
Walid Abotbina ◽  
S. M. Sapuan ◽  
M. T. H. Sultan ◽  
M. F. M. Alkbir ◽  
R. A. Ilyas
Keyword(s):  
Tensile Strength ◽  
Moisture Content ◽  
Water Absorption ◽  
Food Packaging ◽  
The Other ◽  
Packaging Film ◽  
Film Properties ◽  
Selection Of

This work aims to develop cornstarch (CS) based films using fructose (F), glycerol (G), and their combination (FG) as plasticizers with different ratios for food packaging applications. The findings showed that F-plasticized film had the lowest moisture content, highest crystallinity among all films, and exhibited the highest tensile strength and thermostability. In contrast, G-plasticized films showed the lowest density and water absorption with less crystallinity compared to the control and the other plasticized film. In addition, SEM results indicated that FG-plasticized films had a relatively smoother and more coherent surface among the tested films. The findings have also shown that varying the concentration of the plasticizers significantly affected the different properties of the plasticized films. Therefore, the selection of a suitable plasticizer at an appropriate concentration may significantly optimize film properties to promote the utilization of CS films for food packaging applications.

scholarly journals Effects of water absorption on the mechanical properties of hybrid natural fibre/phenol formaldehyde composites

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sekar Sanjeevi ◽  
Vigneshwaran Shanmugam ◽  
Suresh Kumar ◽  
Velmurugan Ganesan ◽  
Gabriel Sas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Water Absorption ◽  
Hybrid Composites ◽  
Phenol Formaldehyde ◽  
Natural Fibre ◽  
The Other ◽  
Fibre Reinforcement ◽  
Dry Conditions

AbstractThis investigation is carried out to understand the effects of water absorption on the mechanical properties of hybrid phenol formaldehyde (PF) composite fabricated with Areca Fine Fibres (AFFs) and Calotropis Gigantea Fibre (CGF). Hybrid CGF/AFF/PF composites were manufactured using the hand layup technique at varying weight percentages of fibre reinforcement (25, 35 and 45%). Hybrid composite having 35 wt.% showed better mechanical properties (tensile strength ca. 59 MPa, flexural strength ca. 73 MPa and impact strength 1.43 kJ/m2) under wet and dry conditions as compared to the other hybrid composites. In general, the inclusion of the fibres enhanced the mechanical properties of neat PF. Increase in the fibre content increased the water absorption, however, after 120 h of immersion, all the composites attained an equilibrium state.

scholarly journals The Influence of Starch Origin on the Properties of Starch Films: Packaging Performance

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1146
Author(s):  
Zuzanna Żołek-Tryznowska ◽  
Alicja Kałuża
Keyword(s):  
Tensile Strength ◽  
Free Energy ◽  
Surface Free Energy ◽  
Food Packaging ◽  
Energy Surface ◽  
Free Energy Surface ◽  
Casting Method ◽  
Starch Solution ◽  
Film Properties ◽  
Starch Films

Starch films can be used as materials for food packaging purposes. The goal of this study is to compare how the starch origin influence the selected starch film properties. The films were made from various starches such as that from maize, potato, oat, rice, and tapioca using 50%w of glycerine as a plasticizer. The obtained starch-based films were made using the well-known casting method from a starch solution in water. The properties of the films that were evaluated were tensile strength, water vapour transition rate, moisture content, wettability, and their surface free energy. Surface free energy (SFE) and its polar and dispersive components were calculated using the Owens-Wendt-Rabel-Kaelbe approach. The values of SFE in the range of 51.64 to 70.81 mJ∙m−2 for the oat starch-based film and the maize starch-based film. The films revealed worse mechanical properties than those of conventional plastics for packaging purposes. The results indicated that the poorest tensile strength was exhibited by the starch-based films made from oat (0.36 MPa) and tapioca (0.78 MPa) and the greatest tensile strength (1.49 MPa) from potato.

Reinforcement of Polymers. I. Tear Resistance of Filled Mixes and Adhesion of Elastomer to Filler as a Function of Duration and Temperature of Elastomer and Filler Contact

1968 ◽  
Vol 41 (3) ◽  
pp. 601-607
Author(s):  
V. G. Raevskii ◽  
S. M. Yagnyatinskaya ◽  
S. N. Episeeva ◽  
S. S. Voyutskii
Keyword(s):  
Experimental Data ◽  
Tensile Strength ◽  
Surface Crack ◽  
General Type ◽  
Physicomechanical Properties ◽  
The Other ◽  
Local Defect ◽  
System Components ◽  
Selection Of ◽  
Tear Resistance

Abstract In accordance with the concepts being developed by the authors of the present paper, the influence of fillers on the properties of filled systems is determined by adhesion of the polymer to the filler. There are indications of the significance of this factor in many papers dealing with the study of reinforcement. However, they do not advance adhesion as a basic factor which determines reinforcement. This has become possible after the development of a procedure for the evaluation of adhesion of polymers to powdered fillers. This paper lists experimental data on the correlation between the duration and temperature of contact of the elastomer with filler particles on the tear resistance of filled mixes, on one hand, and the time and temperature dependence of the adhesion of the system components to one another, on the other. The selection of tear resistance as a characteristic of the physicomechanical properties of the system is governed by the fact that failure starts, as a rule, from a random local defect. Most frequently this is a small cut or surface crack. For this reason, the assertion of a number of researchers that the operating properties of products are more fully characterized by tear resistance rather than by tensile strength is fully acceptable. Besides, tearing is the most general type of destruction of materials, inasmuch as it takes place during rupture as well as during wear.

scholarly journals In Vitro Characterization of a Novel Human Acellular Dermal Matrix (BellaCell HD) for Breast Reconstruction

2020 ◽  
Vol 7 (2) ◽  
pp. 39
Author(s):  
Sun-Young Nam ◽  
Dayoung Youn ◽  
Gyeong Hoe Kim ◽  
Ji Hwa Chai ◽  
Hyang Ran Lim ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Breast Reconstruction ◽  
Clinical Performance ◽  
The Other ◽  
Elongation Ratio ◽  
Dermal Matrix ◽  
Significant Discrepancy ◽  
Acellular Dermal

In the past, acellular dermal matrices (ADMs) have been used in implant-based breast reconstruction. Various factors affect the clinical performance of ADMs since there is a lack of systematic characterization of ADM tissues. This study used BellaCell HD and compared it to two commercially available ADMs—AlloDerm Ready to Use (RTU) and DermACELL—under in vitro settings. Every ADM was characterized to examine compatibility through cell cytotoxicity, proliferation, and physical features like tensile strength, stiffness, and the suture tensile strength. The BellaCell HD displayed complete decellularization in comparison with the other two ADMs. Several fibroblasts grew in the BellaCell HD with no cytotoxicity. The proliferation level of fibroblasts in the BellaCell HD was higher, compared to the AlloDerm RTU and DermACELL, after 7 and 14 days. The BellaCell HD had a load value of 444.94 N, 22.44 tensile strength, and 118.41% elongation ratio, and they were higher than in the other two ADMs. There was no significant discrepancy in the findings of stiffness evaluation and suture retention strength test. The study had some limitations because there were many other more factors useful in ADM’s testing. In the study, BellaCell HD showed complete decellularization, high biocompatibility, low cytotoxicity, high tensile strength, high elongation, and high suture retention strengths. These characteristics make BellaCell HD a suitable tissue for adequate and safe use in implant-based breast reconstruction in humans.

scholarly journals Selection of Unusual Actinomycetal Primary σ70 Factors by Plant-Colonizing Frankia Strains

2004 ◽  
Vol 70 (2) ◽  
pp. 991-998 ◽  
Author(s):  
Céline Lavire ◽  
Didier Blaha ◽  
Benoit Cournoyer
Keyword(s):  
Growth Conditions ◽  
Infection Process ◽  
The Other ◽  
Gene Library ◽  
Pcr Screening ◽  
Liquid Cultures ◽  
Total Dna ◽  
Root Hair Infection ◽  
Selection Of

ABSTRACT Functional adaptations of σ70 transcriptional factors led to the emergence of several paralogous lineages, each one being specialized for gene transcription under particular growth conditions. Screening of a Frankia strain EaI-12 gene library by σ70 DNA probing allowed the detection and characterization of a novel actinomycetal primary (housekeeping) σ70 factor. Phylogenetic analysis positioned this factor in the RpoD cluster of proteobacterial and low-G+C-content gram-positive factors, a cluster previously free of any actinobacterial sequences. σ70 DNA probing of Frankia total DNA blots and PCR screening detected one or two rpoD-like DNA regions per species. rpoD matched the conserved region in all of the species tested. The other region was found to contain sigA, an alternative primary factor. sigA appeared to be strictly distributed among Frankia species infecting plants by the root hair infection process. Both genes were transcribed by Frankia strain ACN14a grown in liquid cultures. The molecular phylogeny of the σ70 family determined with Frankia sequences showed that the alternative actinomycetal factors and the essential ones belonged to the same radiation. At least seven distinct paralogous lineages were observed among this radiation, and gene transfers were detected in the HrdB actinomycetal lineage.

Mechanical, Barrier, Physicochemical, and Heat Seal Properties of Starch Films Filled with Nanoparticles

2013 ◽  
Vol 25 ◽  
pp. 90-100 ◽  
Author(s):  
Abdorreza Mohammadi Nafchi ◽  
Abd Karim Alias
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Moisture Content ◽  
Water Solubility ◽  
Decomposition Temperature ◽  
Casting Method ◽  
Film Properties ◽  
Starch Films ◽  
Seal Strength ◽  
Mechanical Barrier

The effects of nanoparticles (nanoclay and nanosilicon dioxide) on heat sealability, physicochemical, barrier, and mechanical properties of starch films were investigated. Starch films were prepared by casting method with addition of nanoparticles and plasticizers. All film properties were measured under standard conditions. Mechanical properties of all types of films were increased by incorporation of nanoparticles. Mungbean starch films showed 100% increment in tensile strength by incorporation of nanoclay. Moisture content, water solubility, and WVP of all starch films decreased whereas decomposition temperature of the films was increased by incorporation of nanoparticles. All films were heat sealable, but nanoparticles-incorporated films exhibited better heat sealability than did control films. In summary, the type of starch governed the heat sealability but nanoparticles have potential to improve seal strength of starch films as well as other functional properties.

scholarly journals Na-Alginate Utilization of Brown Algae (Sargassum sp.) as A Halal Edible Film Basic Materials

2019 ◽  
Vol 1 (1) ◽  
pp. 9-13
Author(s):  
Nisa Nur Khasanah ◽  
Vina Amalia ◽  
Baiq Vera El Viera ◽  
Asti Sawitri
Keyword(s):  
Tensile Strength ◽  
Moisture Content ◽  
Brown Algae ◽  
Research Method ◽  
Edible Films ◽  
Ash Content ◽  
Edible Film ◽  
Isolation And Characterization ◽  
Two Stages

Edible films made of Na-alginate from brown algae have great potential to be developed as brown algae have a fairly high abundance in Indonesia but have not been widely used. Therefore, in this study conducted by making edible films made from Na-alginate modified by the addition of hydrocolloids carrageenan and glycerol plasticizier. The addition of carrageenan biopolymers is the property of the produced Edible film. The use of glycerol as a plasticizer aims to improve the properties of elasticity Edible films. This research method consists of two stages. First, the isolation and characterization of Na-alginate. Both the preparation and characterization of making edible films. Na-alginate characterization results in yield of 25.68%, 10.84% moisture content, ash content of 23.79%. The carrageenan on the formula Edible films affect the characterization of the resulting films. The value of water absorption from 333.13% to 335.45% and the elongation of 26.26% to 33.34%, and the declining value of tensile strength of 8.93 MPa to 4.17 MPa and young's modulus values of 0.34 MPa to 0.22 MPa with the addition of carrageenan on an Edible film formula.

Preparation and characterization of chitosan-based antimicrobial active food packaging film incorporated with apple peel polyphenols

2018 ◽  
Vol 114 ◽  
pp. 547-555 ◽  
Author(s):  
Asad Riaz ◽  
Shicheng Lei ◽  
Hafiz Muhammad Saleem Akhtar ◽  
Peng Wan ◽  
Dan Chen ◽  
...  
Keyword(s):  
Food Packaging ◽  
Packaging Film ◽  
Active Food Packaging ◽  
Apple Peel

scholarly journals Physical Properties of Edible Films from Pangasius catfish Bone Gelatin-Breadfruits Strach with Different Formulations

2020 ◽  
Vol 3 (2) ◽  
pp. 42-47
Author(s):  
Rian Adhi Santoso ◽  
Yoni Atma
Keyword(s):  
Tensile Strength ◽  
Water Vapor ◽  
Moisture Content ◽  
Physical Properties ◽  
Food Packaging ◽  
Edible Films ◽  
Fish Bone ◽  
Edible Film ◽  
Japanese Industrial Standard ◽  
Water Vapor Transmission

Abstract— This research aims to provide edible film made from fish bone gelatin of Pangasius catfish mixed breadfruit starch with different formulations. The study was carried out through three stages including breadfruit starch isolation, edible films fabrication and analysis of physical properties of resulted edible film such as thickness, water vapor transmission, tensile strength and percent of elongation as well as moisture content. Edible films which were formulated from fish bone gelatin of Pangasius catfish by breadfruit starch addition have thickness values ranged of ​​0.084-0.123 mm, 6.08 - 16.77% of moisture content, water vapor transmission of 1.07 - 1.60 g/ m²/hour, tensile strength of 0.245 - 1.186 MPa, and percent of elongation around 70 - 87.14%. The edible films from gelatin of Pangasius catfish bone with breadfruit starch addition have physical characteristic which fulfill the standard requirements issued by Japanese Industrial Standard (JIS) Keywords— edible film; biodegradable materials; fish gelatin;breadfruit starch; food packaging    

Characterization of Gamma Irradiated PP/LDPE Blend

2014 ◽  
Vol 353 ◽  
pp. 90-95
Author(s):  
Tatiana Mayumi Moori ◽  
Mauro Cesar Terence ◽  
Nilson Casimiro Pereira ◽  
Sonia Braunstein Faldini ◽  
Leila Figueiredo de Miranda
Keyword(s):  
Tensile Strength ◽  
Gamma Rays ◽  
The Other ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Average Increase ◽  
Polymeric Chains ◽  
Before And After ◽  
Gamma Irradiated

This study analyzed nine polypropylene (PP) and low-density polyethylene (LDPE) blends where the mass concentrations of each sample were changed, proportionally. The aim was to investigate the tensile strength by means of these polymers best combination, before and after its exposal to gamma rays. The results showed that the 20/80 - PP/LDPE blend had a better performance concerning mechanical properties after irradiation, where the maximums tensile stress had an average increase of 30% in 30 and 50 kGy doses and 33% in the 200 kGy dose. On the other hand, it was verified that the higher blend's PP concentration, the higher its tensile strength will be (except for 100 kGy and 200 kGy doses which PP concentration over 70% can cause eventual degradation in the polymeric chains of the blend).

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