scholarly journals Effect of antimicrobial on mechanical, barrier and optical properties of corn starch based self-supporting edible film

2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Tanima Chowdhury ◽  
Madhusweta Das
Keyword(s):  
Tensile Strength ◽  
Optical Properties ◽  
Benzoic Acid ◽  
Water Vapour ◽  
Corn Starch ◽  
Water Vapour Permeability ◽  
Edible Film ◽  
Potassium Sorbate ◽  
Sodium Propionate ◽  
Vapour Permeability

Antimicrobials like potassium sorbate, sodium propionate, and benzoic acid were incorporated in corn starch based formulation to investigate their effect on mechanical, water vapour barrier and optical properties of the developed self supporting edible film. The film was prepared by casting technique.When incorporated at 1.40% and above, potassium sorbate decreased the tensile strength (about 22%) and increased the elongation (about 55%) of control film; whereas, it increased the water vapour permeability by 15% only when added at 2.66%. At 2.66%, benzoic acid reduced the tensile strength by 24% and sodium propionate increased elongation by 17%. These two antimicrobials did not change the water vapour permeability. However, all the three antimicrobials adversely affected the optical properties by decreasing the whiteness index, increasing yellowness index, and reducing the surface gloss, with potassium sorbate showing the maximum effect. Among the three antimicrobials, sodium propionate appeared to be the best with minimum deterioration of film properties.

scholarly journals Effect of antimicrobial on mechanical, barrier and optical properties of corn starch based self-supporting edible film

2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Tanima Chowdhury ◽  
Madhusweta Das
Keyword(s):  
Tensile Strength ◽  
Optical Properties ◽  
Benzoic Acid ◽  
Water Vapour ◽  
Corn Starch ◽  
Water Vapour Permeability ◽  
Edible Film ◽  
Potassium Sorbate ◽  
Sodium Propionate ◽  
Vapour Permeability

Antimicrobials like potassium sorbate, sodium propionate, and benzoic acid were incorporated in corn starch based formulation to investigate their effect on mechanical, water vapour barrier and optical properties of the developed self supporting edible film. The film was prepared by casting technique. When incorporated at 1.40% and above, potassium sorbate decreased the tensile strength (about 22%) and increased the elongation (about 55%) of control film; whereas, it increased the water vapour permeability by 15% only when added at 2.66%. At 2.66%, benzoic acid reduced the tensile strength by 24% and sodium propionate increased elongation by 17%. These two antimicrobials did not change the water vapour permeability. However, all the three antimicrobials adversely affected the optical properties by decreasing the whiteness index, increasing yellowness index, and reducing the surface gloss, with potassium sorbate showing the maximum effect. Among the three antimicrobials, sodium propionate appeared to be the best with minimum deterioration of film properties.

Effect of Plasticizer on the Physical and Mechanical Characteristics of Caesalpinia pulcherrima Gum Edible Film

2020 ◽  
Vol 987 ◽  
pp. 112-117
Author(s):  
Wancheng Sittikijyothin ◽  
Khanaphit Khumduang ◽  
Chularat Hongvaleerat ◽  
Rattanaphol Mongkholrattanasit
Keyword(s):  
Tensile Strength ◽  
Propylene Glycol ◽  
Water Vapour ◽  
Water Vapor Permeability ◽  
Edible Films ◽  
Water Vapour Permeability ◽  
Edible Film ◽  
Vapor Permeability ◽  
Vapour Permeability ◽  
Elongation At Break

The gum edible films were prepared from Caesalpinia pulcherrima seeds. The effects of plasticizer types and contents on physical and mechanical properties of gum edible film were investigated. Three plasticizers as glycerol and sorbitol and propylene glycol at different adding concentrations (0.5%, 1.0%, and 1.5%) were used. Glycerol provided flexible and sticky films with the highest water vapour permeability and elongation at break but the lowest tensile strength. In contrast, propylene glycol provided brittle films with the highest tensile strength but the lowest elongation at break and water vapour permeability. In addition, increasing in plasticizer content resulted in decreased tensile strength concomitant with an increased in elongation at break and water vapor permeability.

scholarly journals Enhancement of Hydrostatic Resistance and Mechanical Performance of Waterproof Breathable Laminated Fabrics

2019 ◽  
Vol 19 (1) ◽  
pp. 44-53
Author(s):  
Abdur Razzaque ◽  
Pavla Tesinova ◽  
Lubos Hes
Keyword(s):  
Tensile Strength ◽  
Water Vapour ◽  
Mechanical Performance ◽  
Special Property ◽  
Air Permeability ◽  
Water Vapour Permeability ◽  
Water Repellent ◽  
Hydrophobic Membrane ◽  
Vapour Permeability ◽  
Different Types

Abstract Waterproof breathable laminated fabrics have the special property that permits water vapour to pass through but protects by preventing the entrance of liquid water. Different characteristic properties of the layered constructions of these fabrics have good influence on their hydrostatic resistance and mechanical performance. This research study presents an experiment to enhance the hydrostatic resistance and tensile strength of four different types of hydrophobic membrane laminated waterproof fabrics by considering their breathability as well. For this purpose, water repellent coating based on C6-fluorocarbon resin along with polysiloxane hydrophobic softening agent was applied on these four different types of laminated fabrics using pad-dry-cure method. The coated fabrics were characterised by performing different experiments to evaluate the effect of coating on their hydrostatic resistance and mechanical property as well as on water vapour permeability and air permeability. From the test results and analysis of variance (ANOVA), it was found that hydrostatic resistance and tensile strength of the laminated fabrics were enhanced after coating along with proper water repellent property, whereas there were no significant changes in their water vapour permeability and air permeability.

scholarly journals Preparation and Characteriztion of Biodegradable Composite Films from Poly (vinyl alcohol) and Natural Proteins for Food and other Packaging Applications

2019 ◽  
Vol 8 (4) ◽  
pp. 4834-4843
Keyword(s):  
Tensile Strength ◽  
Water Vapour ◽  
Polymer Films ◽  
Vinyl Alcohol ◽  
Water Vapour Permeability ◽  
Poly Vinyl Alcohol ◽  
Packaging Materials ◽  
Composite Polymer ◽  
Vapour Permeability ◽  
Biodegradable Composite

Packaging materials provide a means to preserve, protect, merchandise, market and distribute foods. Synthetic polymers are widely and massively used to make packaging materials for diverse applications.The environmental issues due to the non-degradability of the polymer packaging material wastes demands biodegradable and environmental friendly polymers for these applications. Hence increasing research is focussed to manufacture packaging materials from biodegradeable synthetic and natural polymers.The present study involves fabrication of biodegradable composite polymer films by solution casting from natural biopolymers such as whey and soy proteins, and synthetic biocompatible polymer such as poly(vinyl alcohol) using UV light, glutaraldehyde etc as croslinkers, and glycerol as a plasticizes. The prepared films were evaluated for their tensile strength, water vapour permeability, thermal stability, biodegradability, structure, morphology etc. The tensile strength in terms of breaking load and % elongation measured on non standard dimension of the films were in the range 1.6 -4.7 kgf and 75-400 % respectively. Thermogravimetric studies indicated that polymer films were sufficiently thermostable for packaging uses. Soil burial test and X-ray diffraction studies of the films indicated that they were biodegradable and predominantly amorphous respectively. Glutaraldehyde crosslinked composite polymer films were found to have improved antimicrobial properties compared to the uncrosslinked film. The water vapour permeability of the fabricated films were within the acceptable range of values (5.208 -7.81 g/cm2 h * 10-5 ) reported for typical biopolymer films used in packaging applications. The fabricated composite polymer films may be exploited for commercial packaging applications.

scholarly journals Physicochemical characteristic of modified edible film made from gelatine of sea bass (Lates calcarifer) residue with palmitic acid and soybean protein isolate treatment

Food Research ◽  
2021 ◽  
Vol 5 (5) ◽  
pp. 157-166
Author(s):  
T.A. Agustini ◽  
W. Nurohman ◽  
D.P.K. Raharjo ◽  
I. Wijayanti ◽  
D. Romadhon ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Palmitic Acid ◽  
Water Vapour ◽  
Soybean Protein ◽  
Sea Bass ◽  
Edible Films ◽  
Protein Isolate ◽  
Edible Film ◽  
Soybean Protein Isolate ◽  
Vapour Permeability

The use of fish waste as raw material in producing gelatin becomes important when it is related to the halal perspective. Sea bass skin contains high protein, especially collagen protein which can be used as the main component of edible film. An edible film made from gelatin of fish skin usually lacks water vapour transmission due to its hydrophilic properties. Modification of formula in producing an edible film from fish gelatin with the addition of lipid such palmitic acid (PA treatment) and soybean protein isolate (SPI treatment) can affect the characteristics of the edible film resulted. This study was aimed to evaluate the chemical (solubility, water vapour permeability) and physical characteristics (thickness, tensile strength, per cent elongation, SEM) of an edible film made from gelatin with the addition of palmitic acid and soybean protein isolate with different concentration. The results showed that edible films with SPI addition yield the best film thickness (<2.5 mm) while PA addition resulted in better tensile strength of the films (>3.92 MPa) according to the Japanese Industrial Standard. The per cent elongation of both films with PA (21.3-34.44%) and SPI (36.06-117.53%) addition decreased with increasing concentration, but SPI generally gave higher elongation compared to PA. The addition of SPI gave lower solubility and higher water vapour transmission values compared to PA, however, the addition of 4.5% of PA gave the lowest water vapour transmission (5.416 g/m2 h). Therefore, the best treatment in this study was concluded to be 4% of SPI addition based on the best thickness, per cent elongation, water vapour transmission and solubility results.

scholarly journals Karakterisasi Edible Film dari Karagenan dan Kitosan dengan Metode Layer by Layer

2019 ◽  
Vol 14 (2) ◽  
pp. 141
Author(s):  
Rany Dwimayasanti ◽  
Bayu Kumayanjati
Keyword(s):  
Water Vapour ◽  
Water Vapour Permeability ◽  
Edible Film ◽  
Layer By Layer ◽  
Vapour Permeability

enis pengemas biodegradable saat ini sangat diperlukan untuk mengurangi penggunaan plastik sintetik, di antaranya dengan pengembangan pengemas edible film yang lebih ramah lingkungan. Karagenan dan kitosan merupakan polimer alam yang berpotensi menjadi bahan dasar dalam pembuatan edible film. Penelitian pembuatan edible film berbahan dasar karagenan dan kitosan dengan metode layer-by-layer telah dilakukan. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi karagenan dan kitosan yang berbeda terhadap kualitas edible film yang dihasilkan. Karakterisasi film yang dilakukan meliputi uji kuat tarik, elongasi, kelarutan, water vapour permeability (WVP) dan morfologi permukaan. Rancangan percobaan yang digunakan adalah faktorial 2 faktor dengan variasi karagenan (1,0%, 1,5%, 2,0%, 2,5%) dan variasi kitosan (0,5%, 1,0%, 1,5%, 2,0%). Hasil penelitian menunjukkan bahwa setiap kombinasi konsentrasi karagenan dan kitosan menghasilkan nilai yang berbeda-beda. Kenaikan konsentrasi karagenan dan kitosan tidak selalu berbanding lurus terhadap kenaikan nilai kuat tarik, elongasi, kelarutan, WVP dan morfologi permukaan edible film. Secara umum, dari seluruh perlakuan yang ada dapat disimpulkan bahwa kombinasi karagenan 2,5% dan kitosan 1,0% adalah formulasi terbaik.

Using Control Chart to Detect Abnormal Changes in the Permeability

2013 ◽  
Vol 779-780 ◽  
pp. 319-322
Author(s):  
Ming Hung Shu ◽  
Jui Chan Huang ◽  
Thanh Lam Nguyen ◽  
Bi Min Hsu
Keyword(s):  
Water Vapour ◽  
Average Run Length ◽  
Stable Process ◽  
Critical Factor ◽  
Water Vapour Permeability ◽  
Control Signal ◽  
Process Mean ◽  
Vapour Permeability ◽  
Practical Applications ◽  
Printing Papers

Water-vapour permeability is a critical factor of writing/ printing papers in most of practical applications; but how to monitor the manufacturing process to keep the key characteristic of the paper in control is still understudied. Therefore, in this paper, in order to monitor the water-vapour permeability of writing/ printing papers, MaxGWMA chart is first suggested due to its best effectiveness in terms of average run length performance and its high capability of detecting small shifts in the process mean and variability as well as identifying the source and the direction of an out-of-control signal. By using MaxGWMA chart, assignable causes of any out-of-control signal should be deeply examined so as to have proper corrective actions undertaken to either eliminate them from the process or reduce the variability induced by them to make the papers consistently manufactured under a stable process.

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