scholarly journals Formulation and Characterization of Edible Films Based on Organic Mucilage from Mexican Opuntia ficus-indica

Coatings ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 506 ◽  
Author(s):  
Dulce C. González Sandoval ◽  
Brenda Luna Sosa ◽  
Guillermo Cristian Guadalupe Martínez-Ávila ◽  
Humberto Rodríguez Fuentes ◽  
Victor H. Avendaño Abarca ◽  
...  
Keyword(s):  
Water Vapor ◽  
Light Transmission ◽  
Transmission Rate ◽  
Film Formation ◽  
Water Vapor Permeability ◽  
Edible Films ◽  
Solution Viscosity ◽  
Vapor Permeability ◽  
Yellowness Index ◽  
Opuntia Ficus Indica

The consumption of organic products has increased in recent years. One of the most important products in Mexico is nopal. Nopal’s content and properties make the formulation of edible films possible. In this study, we aimed to develop and characterize biodegradable edible films containing mucilage from Opuntia ficus-indica. The mucilage extraction yield, thickness, color, water vapor permeability, light transmission rate, film transparency, solubility, stability of dispersion, and puncture strength were measured. The use of mucilage from different cultivars affected the water vapor permeability (8.40 × 10−11 g·m−1·s−1·Pa−1 for cultivar Villanueva, 3.48 × 10−11 g·m−1·s−1·Pa−1 for Jalpa, and 1.63 × 10−11 g·m−1·s−1·Pa−1 for Copena F1). Jalpa provided the most soluble mucilage with the highest thickness (0.105 mm). Copena F1 provided the clearest film with the greatest transparency (3.81), the best yellowness index, and the highest resistance (4.44 N·mm−1). Furthermore, this film had the best light transmission rate (48.93%). The Copena F1 showed the best film formation solution viscosity. These results indicate that mucilage mixed with pectin is a potential source for the formulation of edible films.

scholarly journals Preparation and Characterization of Edible Dialdehyde Carboxymethyl Cellulose Crosslinked Feather Keratin Films for Food Packaging

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 158
Author(s):  
Yao Dou ◽  
Liguang Zhang ◽  
Buning Zhang ◽  
Ming He ◽  
Weimei Shi ◽  
...  
Keyword(s):  
Water Vapor ◽  
Carboxymethyl Cellulose ◽  
Food Packaging ◽  
Light Transmission ◽  
Value Added ◽  
Water Vapor Permeability ◽  
Barrier Properties ◽  
Edible Films ◽  
Vapor Permeability ◽  
Feather Keratin

The development of edible films based on the natural biopolymer feather keratin (FK) from poultry feathers is of great interest to food packaging. Edible dialdehyde carboxymethyl cellulose (DCMC) crosslinked FK films plasticized with glycerol were prepared by a casting method. The effect of DCMC crosslinking on the microstructure, light transmission, aggregate structure, tensile properties, water resistance and water vapor barrier were investigated. The results indicated the formation of both covalent and hydrogen bonding between FK and DCMC to form amorphous FK/DCMC films with good UV-barrier properties and transmittance. However, with increasing DCMC content, a decrease in tensile strength of the FK films indicated that plasticization, induced by hydrophilic properties of the DCMC, partly offset the crosslinking effect. Reduction in the moisture content, solubility and water vapor permeability indicated that DCMC crosslinking slightly reduced the moisture sensitivity of the FK films. Thus, DCMC crosslinking increased the potential viability of the FK films for food packaging applications, offering a value-added product.

scholarly journals The Effect of Extraction Conditions on the Barrier and Mechanical Properties of Kefiran Films

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 602
Author(s):  
Carmen Rodica Pop ◽  
Teodora Emilia Coldea ◽  
Liana Claudia Salanţă ◽  
Alina Lăcrămioara Nistor ◽  
Andrei Borşa ◽  
...  
Keyword(s):  
Water Vapor ◽  
Conformational Changes ◽  
Water Vapor Permeability ◽  
Edible Films ◽  
Film Structure ◽  
Water Soluble ◽  
Vapor Permeability ◽  
Water Molecules ◽  
Compact Structure ◽  
Technology Applications

Kefiran is an exopolysaccharide classified as a heteropolysaccharide comprising glucose and galactose in equimolar quantities, and it is classified as a water-soluble glucogalactan. This work aimed to investigate the effect of different extraction conditions of kefiran on the structural and physical properties of the edible films obtained. Fourier-transform infrared spectroscopy and scanning electron microscopy were performed, together with a determinations of moisture content, solubility, water vapor permeability and degree of swelling. The kefiran films presented values of the water vapor permeability between 0.93 and 4.38 × 10−11 g/m.s.Pa. These results can be attributed to the development of a more compact structure, where glycerol had no power to increase the free volume and the water vapor diffusion through their structure. The possible conformational changes in the kefiran film structure, due to the interspersing of the plasticizers and water molecules that they absorb, could be the reason for producing flexible kefiran films in the case of using glycerol as a plasticizer at 7.5% w/w. Moreover, it was observed that the extraction conditions are a significant factor in the properties of these films and their food technology applications.

scholarly journals Preparation, properties and applications of wheat gluten edible films

2000 ◽  
Vol 9 (1) ◽  
pp. 23-35 ◽  
Author(s):  
P. TANADA-PALMU ◽  
H. HELÉN ◽  
L. HYVÖNEN
Keyword(s):  
Weight Loss ◽  
Tensile Strength ◽  
Water Vapor ◽  
Wheat Gluten ◽  
Single Layer ◽  
Water Vapor Permeability ◽  
Edible Films ◽  
Bilayer Film ◽  
Vapor Permeability ◽  
Elongation At Break

Edible films from wheat gluten were prepared with various amounts of glycerol as a plasticizer. Water vapor permeability, oxygen permeability, tensile strength and percentage elongation at break at different water activities ( aw ) were measured. Films with low amounts of glycerol had lower water vapor and oxygen permeabilities, higher tensile strength and lower elongation at break. Wheat gluten coatings reduced weight loss during two weeks of storage for cherry tomatoes and sharon fruits compared to uncoated controls. A bilayer film of wheat gluten and beeswax significantly lowered weight loss from coated cheese cubes compared to single layer coating of wheat gluten.;

scholarly journals Using food wraps based on gelatin to preserve food quality

2019 ◽  
Vol 48 (1) ◽  
pp. 156-163
Author(s):  
Ольга Сергазиева ◽  
Olga Sergazieva ◽  
Наталья Долганова ◽  
Natalya Dolganova
Keyword(s):  
Water Vapor ◽  
Film Formation ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Fish Scale ◽  
Waste Products ◽  
Industry Waste ◽  
Confectionery Products ◽  
Thickness Variability ◽  
The Given

The research in the given sphere is essential because it is concerned with the development of ecologically clean natural edible food wraps production technology using fish industry waste products. The article presents the results of the studies devoted to the consideration of properties and possibilities of using edible food wraps based on ichthyo-gelatin to preserve quality of different food products. To produce edible food wrap the author used gelatin obtained from the waste products (fish scale) of fish-processing industry (ichthyo-gelatin). The wrap was produced based on ichthyo-gelatin with concentration from 5 to 15% and plasticizer (glycerol with concentration from 2 to 20%). All obtained wraps were subject to quality control considering organoleptic (flavor, color, look) and physicochemical properties (pH, moisture content, dissolution rate, film thickness, breaking stress at stretching, water vapor permeability). The obtained results showed that it is possible to use food wraps based on ichthyo-gelatin in public catering. Changes in plasticizer proportion made it possible to produce two types of film: the first one was thicker (2% of plasticizer) having low stretching ability it can further be used in production of bags for products storage and freezing; the second type of the film (5% of plasticizer) can be used to produce colorful films with prints which can be applied for protective and decorative wrapping of confectionery products. To use the developed films as a protective wrapping for cold dishes (such as salads and various cold cuts), to protect banquet dishes against drying and thick film formation it is necessary to pay especial attention to water vapor permeability of the film its dependence on the proportion of plasticizer and thickness. Variability of this parameter can extend the application sphere of the developed edible film.

Water Vapor Transmission Properties of Men’s Quick-Dry Sportswear

2020 ◽  
Vol 897 ◽  
pp. 30-34
Author(s):  
Yan Ngo Fan ◽  
Wen Yi Wang ◽  
Chi Wai Kan ◽  
Kamol Promlawan ◽  
Wasana Changmuong ◽  
...  
Keyword(s):  
Water Vapor ◽  
Transmission Rate ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Water Vapor Transmission Rate ◽  
Similar Performance ◽  
Transmission Properties ◽  
Water Vapor Transmission

This study evaluated the quick dry properties of summer men’s sportswear T-shirts of different brands (Nike, Adidas, Laishilong and Columbia) by studying the water vapor transmission behavior. The results indicate that Laishilong was the best sample in terms of water vapor transmission rate, whereas Columbia was the poorest. Moreover, samples of Nike, Adidas, Laishilong and Columbia, had similar water vapor transmission rate. This implies that they had comparatively similar performance in water vapor permeability.

Effect of Thermocycling on the Properties of Goat Skin Leather

2011 ◽  
Vol 399-401 ◽  
pp. 1573-1576
Author(s):  
Xue Jing Zheng ◽  
Shu Hao Huo ◽  
Jie Liu ◽  
Kun Wang ◽  
Ke Yong Tang
Keyword(s):  
Water Vapor ◽  
Thermal Treatment ◽  
Dimensional Stability ◽  
Transmission Rate ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Water Vapor Transmission Rate ◽  
Shrinkage Temperature ◽  
Upper Limit ◽  
Before And After

The pickled goat skins were crosslinked by chromium, aluminum, wattle extract and chestnut extract, respectively. The samples were thermal treated in a container held at different temperature for 5 h for different cycles. The xerothermic stability, water vapor permeability and dimensional stability of the samples were characterized before and after thermal treatment. The effect of thermocycling on the properties of tanned samples was discussed. It was found that the thermocycling at moderate temperature (50 °C) exerted little influence on the xerothermic shrinkage temperature (Txs) of the tanned collagen fibers. The treatment at higher upper limit temperature (100 °C and 150 °C) decreases the Txs and results in an impaired thermal stability. The water vapor transmission rate was decreased after the thermal treatment, likely due to the reduction of the amount of hydrophilic groups of collagen macromolecules as well as the decrease of the pore ratio of leather. Treatment at high temperature damaged the dimensional stability of the specimens.

Sign in / Sign up

Export Citation Format

Share Document