scholarly journals Influence of Ulluco Starch Concentration on the Physicochemical Properties of Starch–Chitosan Biocomposite Films

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4232
Author(s):  
Luis Daniel Daza ◽  
Valeria Soledad Eim ◽  
Henry Alexander Váquiro
Keyword(s):  
Physicochemical Properties ◽  
Young Modulus ◽  
Barrier Properties ◽  
Edible Films ◽  
Mechanical And Thermal Properties ◽  
Elongation At Break ◽  
Starch Concentration ◽  
Biocomposite Films ◽  
Technological Potential ◽  
The Us

This work aimed to prepare ulluco starch (US)/chitosan (Ch) edible films and evaluate the effect of the concentration of US on their physicochemical properties. The use of edible films is a means of adding value to the ulluco crop and evaluating the viability of using new sources to produce packaging materials. Different samples were prepared at different US concentrations (2%, 3%, 4%, and 5% w/v) and a fixed chitosan concentration (1.5% w/v); then, samples were analyzed, considering their physical, mechanical, and thermal properties. The US/Ch edible films showed an increase in solubility from 17.5% to 21.7%, swelling power (SP) from 38.9% to 267%, tensile strength (TS) from 3.69 MPa to 10.7 MPa, Young modulus (YM) from 18.0 Pa to 652 Pa, and thermal stability as the US concentration increased. However, samples with low US concentrations showed higher elongation at break (EB) (36.6%) and better barrier properties (WVP) (5.61 × 10−11 g/m s Pa). The films evaluated in this work presented good physical, mechanical, and barrier properties, revealing their potential as packaging material ensuring food security, and demonstrating the technological potential of US.

scholarly journals Development and characterization of probiotic mucilage based edible films for the preservation of fruits and vegetables

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Seyed Mohammad Davachi ◽  
Neethu Pottackal ◽  
Hooman Torabi ◽  
Alireza Abbaspourrad
Keyword(s):  
Fruits And Vegetables ◽  
Uv Light ◽  
Barrier Properties ◽  
Edible Films ◽  
Food Preservation ◽  
Elongation At Break ◽  
The Public ◽  
Medical Benefits ◽  
Seed Mucilage

AbstractThere is growing interest among the public and scientific community toward the use of probiotics to potentially restore the composition of the gut microbiome. With the aim of preparing eco-friendly probiotic edible films, we explored the addition of probiotics to the seed mucilage films of quince, flax, and basil. These mucilages are natural and compatible blends of different polysaccharides that have demonstrated medical benefits. All three seed mucilage films exhibited high moisture retention regardless of the presence of probiotics, which is needed to help preserve the moisture/freshness of food. Films from flax and quince mucilage were found to be more thermally stable and mechanically robust with higher elastic moduli and elongation at break than basil mucilage films. These films effectively protected fruits against UV light, maintaining the probiotics viability and inactivation rate during storage. Coated fruits and vegetables retained their freshness longer than uncoated produce, while quince-based probiotic films showed the best mechanical, physical, morphological and bacterial viability. This is the first report of the development, characterization and production of 100% natural mucilage-based probiotic edible coatings with enhanced barrier properties for food preservation applications containing probiotics.

scholarly journals Biodegradable Chitosan Films with ZnO Nanoparticles Synthesized Using Food Industry By-Products—Production and Characterization

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 646
Author(s):  
Victor Gomes Lauriano Souza ◽  
Marta M. Alves ◽  
Catarina F. Santos ◽  
Isabel A. C. Ribeiro ◽  
Carolina Rodrigues ◽  
...  
Keyword(s):  
Zinc Oxide Nanoparticles ◽  
Food Industry ◽  
Low Cost ◽  
Young Modulus ◽  
Barrier Properties ◽  
Zno Nps ◽  
Elongation At Break ◽  
Chitosan Films ◽  
By Products ◽  
Different Levels

This work aimed to produce bionanocomposites of chitosan incorporated with zinc oxide nanoparticles (ZnO NPs) synthesized using food industry by-products and to characterize them. Such nanoparticles are highlighted due to their low cost, antimicrobial activity, accessibility, and sustainability synthesis. Four different levels of ZnO NPs (0, 0.5, 1.0, and 2.0% w/w of chitosan) were tested, and the bionanocomposites were characterized in terms of their hydrophobicity, mechanical, optical, and barrier properties. Overall, the incorporation of ZnO NPs changed the composites from brittle to ductile, with enhanced elongation at break and reduced Young Modulus and tensile strength. Thus, ZnO NPs acted as plasticizer, turning the films more flexible, due to the presence of organic compounds on the NPs. This also favored permeability of oxygen and of water vapor, but the good barrier properties were maintained. Optical properties did not change statistically with the ZnO NPs incorporation. Thus, the characterization presented in this paper may contribute to support a decision on the choice of the material’s final application.

Evaluation of Mechanical and Thermal Properties of MCC/PLA Composite Compatibilized with Modified Cellulose

2013 ◽  
Vol 747 ◽  
pp. 698-702 ◽  
Author(s):  
Voravadee Suchaiya ◽  
Duangdao Aht-Ong
Keyword(s):  
Reaction Time ◽  
Power Output ◽  
Suitable Condition ◽  
Cellulose Ester ◽  
Mechanical And Thermal Properties ◽  
Cellulose Esters ◽  
Elongation At Break ◽  
Degradation Temperature ◽  
Biocomposite Films ◽  
Twin Screw

Biocomposite films from polylactic acid (PLA) and 40wt% banana stem microcrystalline cellulose (BS MCC) were prepared by a twin screw extruder. Two types of cellulose ester, i.e. cellulose butyrate and cellulose laurate were used as a compatibilizer. The cellulose esters were prepared via acylation process under microwave heating. The proper condition for preparing cellulose butyrate was 180 sec of reaction time and 80 watt of power output, while the suitable condition for preparing cellulose laurate was 150 sec of reaction time and 160 watt of power output, respectively. These suitable conditions led to the highest %WI and the absence of the degradation of cellulose. The FT-IR and NMR spectra techniques confirmed that butyrate and laurate were grafted on the BS MCC. For biocomposite films, although the increase of cellulose laurate or cellulose butyrate induced the decrease of Youngs modulus of 40wt% BS MCC/PLA composite, the elongation at break of 40wt% BS MCC/PLA composite was increased. Besides, the addition of 5wt% cellulose butyrate or cellulose laurate resulted in the highest tensile properties, especially in elongation at break, when compared to other contents of cellulose ester. Moreover, cellulose butyrate is an effective compatibilizer to improve the elongation at break of 40wt% BS MCC/PLA since cellulose butyrate had better compatibility with BS MCC and PLA matrix. However, the addition of two types of cellulose ester led to the decrease in the degradation temperature (Td) of 40wt% BS MCC/PLA, particularly in case of the addition of cellulose laurate.

scholarly journals Antibacterial Films Based on Polylactide with the Addition of Quercetin and Poly(Ethylene Glycol)

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1643
Author(s):  
Ewa Olewnik-Kruszkowska ◽  
Magdalena Gierszewska ◽  
Agnieszka Richert ◽  
Sylwia Grabska-Zielińska ◽  
Anna Rudawska ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Young Modulus ◽  
Mechanical And Thermal Properties ◽  
Solvent Casting ◽  
New Materials ◽  
Poly Ethylene Glycol ◽  
Casting Method ◽  
Elongation At Break ◽  
Antibacterial Compound ◽  
Poly Ethylene

A series of new films with antibacterial properties has been obtained by means of solvent casting method. Biodegradable materials including polylactide (PLA), quercetin (Q) acting as an antibacterial compound and polyethylene glycol (PEG) acting as a plasticizer have been used in the process. The effect of quercetin as well as the amount of PEG on the structural, thermal, mechanical and antibacterial properties of the obtained materials has been determined. It was found that an addition of quercetin significantly influences thermal stability. It should be stressed that samples containing the studied flavonoid are characterized by a higher Young modulus and elongation at break than materials consisting only of PLA and PEG. Moreover, the introduction of 1% of quercetin grants antibacterial properties to the new materials. Recorded results showed that the amount of plasticizer did not influence the antibacterial properties; it does, however, cause changes in physicochemical properties of the obtained materials. These results prove that quercetin could be used as an antibacterial compound and simultaneously improve mechanical and thermal properties of polylactide-based films.

scholarly journals Starch–Mucilage Composite Films: An Inclusive on Physicochemical and Biological Perspective

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2588
Author(s):  
Mansuri M. Tosif ◽  
Agnieszka Najda ◽  
Aarti Bains ◽  
Grażyna Zawiślak ◽  
Grzegorz Maj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Barrier Properties ◽  
Edible Films ◽  
Packaging Material ◽  
Polymer Materials ◽  
Synthesis Process ◽  
Packaging Materials ◽  
Packaging Film ◽  
Biodegradable Packaging ◽  
Effective Manner

In recent years, scientists have focused on research to replace petroleum-based components plastics, in an eco-friendly and cost-effective manner, with plant-derived biopolymers offering suitable mechanical properties. Moreover, due to high environmental pollution, global warming, and the foreseen shortage of oil supplies, the quest for the formulation of biobased, non-toxic, biocompatible, and biodegradable polymer films is still emerging. Several biopolymers from varied natural resources such as starch, cellulose, gums, agar, milk, cereal, and legume proteins have been used as eco-friendly packaging materials for the substitute of non-biodegradable petroleum-based plastic-based packaging materials. Among all biopolymers, starch is an edible carbohydrate complex, composed of a linear polymer, amylose, and amylopectin. They have usually been considered as a favorite choice of material for food packaging applications due to their excellent forming ability, low cost, and environmental compatibility. Although the film prepared from bio-polymer materials improves the shelf life of commodities by protecting them against interior and exterior factors, suitable barrier properties are impossible to attain with single polymeric packaging material. Therefore, the properties of edible films can be modified based on the hydrophobic–hydrophilic qualities of biomolecules. Certain chemical modifications of starch have been performed; however, the chemical residues may impart toxicity in the food commodity. Therefore, in such cases, several plant-derived polymeric combinations could be used as an effective binary blend of the polymer to improve the mechanical and barrier properties of packaging film. Recently, scientists have shown their great interest in underutilized plant-derived mucilage to synthesize biodegradable packaging material with desirable properties. Mucilage has a great potential to produce a stable polymeric network that confines starch granules that delay the release of amylose, improving the mechanical property of films. Therefore, the proposed review article is emphasized on the utilization of a blend of source and plant-derived mucilage for the synthesis of biodegradable packaging film. Herein, the synthesis process, characterization, mechanical properties, functional properties, and application of starch and mucilage-based film are discussed in detail.

scholarly journals Antimicrobial Edible Films and Coatings for Meat and Meat Products Preservation

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
Irais Sánchez-Ortega ◽  
Blanca E. García-Almendárez ◽  
Eva María Santos-López ◽  
Aldo Amaro-Reyes ◽  
J. Eleazar Barboza-Corona ◽  
...  
Keyword(s):  
Shelf Life ◽  
Meat Products ◽  
Barrier Properties ◽  
Storage Conditions ◽  
Edible Films ◽  
Animal Origin ◽  
Chemical Additives ◽  
Processed Meats ◽  
Physicochemical Changes ◽  
Preservation Technology

Animal origin foods are widely distributed and consumed around the world due to their high nutrients availability but may also provide a suitable environment for growth of pathogenic and spoilage microorganisms. Nowadays consumers demand high quality food with an extended shelf life without chemical additives. Edible films and coatings (EFC) added with natural antimicrobials are a promising preservation technology for raw and processed meats because they provide good barrier against spoilage and pathogenic microorganisms. This review gathers updated research reported over the last ten years related to antimicrobial EFC applied to meat and meat products. In addition, the films gas barrier properties contribute to extended shelf life because physicochemical changes, such as color, texture, and moisture, may be significantly minimized. The effectiveness showed by different types of antimicrobial EFC depends on meat source, polymer used, film barrier properties, target microorganism, antimicrobial substance properties, and storage conditions. The perspective of this technology includes tailoring of coating procedures to meet industry requirements and shelf life increase of meat and meat products to ensure quality and safety without changes in sensory characteristics.

scholarly journals Gıda Endüstrisinde Kitosan Filmlerin Önemi

2013 ◽  
Vol 1 (2) ◽  
pp. 79 ◽  
Author(s):  
Filiz Uçan ◽  
Hatice Aysun Mercimek
Keyword(s):  
Fruits And Vegetables ◽  
Moisture Transfer ◽  
Barrier Properties ◽  
Edible Films ◽  
Production Costs ◽  
Film Forming ◽  
Materials Used ◽  
Bacteria And Fungi ◽  
Simple Technology ◽  
Storage Times

Requirement simple technology, low production costs, lack of polluting effects and reliability in terms of health of it is the most important advantages of edible films. Chitosan that extend the shelf life of food and increase the economic efficiency of packaging materials is one of the new materials used for edible films. Chitosan was obtained by deacetylation of chitin which is the most commonly occurred polymer after cellulose in nature, in shells of arthropods such as crab, shrimp, lobster and in cell walls of some bacteria and fungi. Chitosan has the important bioactive properties such as hemostatic, bacteriostatic, fungistatic, spermicidal, anticarcinogenic, anticholesteremic, antacids, antiulcer, wound and bone healing accelerator and stimulating the immune system. As well as these features, the film forming and barrier properties of its, chitosan is made the ideal material for edible films and coatings in antimicrobial characters. Especially, in the protection of qualities and the improving storage times of fruits and vegetables, have been revealed the potential use of chitosan. The coating food with chitosan films reduces the oxygen partial pressure in the package, maintains temperature with moisture transfer between food and its environment, declines dehydration, delays enzymatic browning in fruits and controls respiration. In addition to, chitosan are also used on issues such as the increasing the natural flavour, setting texture, increasing of the emulsifying effect, stabilization of color and deacidification.

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