THE ELECTRICAL CONDUCTIVITY OF GELATIN FILM HUMIDIFIED WITH HEAVY WATER VAPOR

1961 ◽  
Vol 39 (5) ◽  
pp. 657-661 ◽  
Author(s):  
C. D. Niven
Keyword(s):  
Electrical Conductivity ◽  
Water Vapor ◽  
Heavy Water ◽  
Gelatin Film ◽  
Gelatin Films

When protons were replaced by deuterium nuclei in gelatin films, by exposure of dry films in 75% relative humidities, the resistance increased very markedly.

scholarly journals Antioxidant, Antibacterial, Water Binding Capacity and Mechanical Behavior of Gelatin-Ferula Oil Film as a Wound Dressing Material

2015 ◽  
Vol 4 (2) ◽  
pp. 103-14
Author(s):  
Gholamreza Kavoosi ◽  
Amin Shakiba ◽  
Mahmood Ghorbani ◽  
Seyed Mohammad Mahdi Dadfar ◽  
Amin Mohammadi Purfard
Keyword(s):  
Water Vapor ◽  
Wound Dressing ◽  
Water Solubility ◽  
Water Vapor Permeability ◽  
Antibacterial Activities ◽  
Gelatin Film ◽  
Vapor Permeability ◽  
Elongation At Break ◽  
Gelatin Films ◽  
Water Swelling

Background: Development of biodegradable and biocompatible films based on protein polymer with strong antioxidant and antibacterial activities has gradually obtained extensive concern in the world. In this study, the improvement of gelatin film properties incorporated with Ferula assa-foetida essential oil (FAO) as a potential antioxidant/antibacterial wound dressing film was investigated. Materials and Methods: Gelatin films were prepared from gelatin solutions (10% w/v) containing different concentration of FAO. The effect of FAO addition on water solubility, water swelling, water vapor permeability, mechanical behavior, light barrier properties as well as antioxidant and antibacterial activities of the films were examined. Results: Water solubility, water swelling and water vapor permeability for pure gelatin films were 29 ± 1.6%, 396 ± 8%, 0.23 ± 0.018 g.mm/m2.h, respectively. Incorporation of FAO into gelatin films caused a significant decrease in swelling and increase in solubility and water vapor permeability. Tensile strength, elastic modulus and elongation at break for pure gelatin films were 4.2 ± 0.4 MPa, 5.8 ± 4.2 MPa, 128 ± 8 %, respectively. Incorporation of FAO into gelatin films caused a significant decrease in tensile strength and elastic modulus and increase in elongation at break of the films. Gelatin film showed UV-visible light absorbance ranging from 280 to 480 nm with maximum absorbance at 420 nm. Gelatin/FAO films also exhibited excellent antioxidant ad antimicrobial activities. Conclusions: Our results suggested that gelatin/FAO films could be used as active films due to their excellent antioxidant and antimicrobial features for different biomedical applications including wound-dressing materials.[GMJ.2015;4(2):103-14]

scholarly journals Smart Starch-Gelatin Films Incorporated with Curcumin

2020 ◽  
Vol 36 (6) ◽  
pp. 1088-1095
Author(s):  
Le Thi Bich Nguyet ◽  
Vinh Tien Nguyen
Keyword(s):  
Acetic Acid ◽  
Food Packaging ◽  
Gelatin Film ◽  
Film Properties ◽  
Elongation At Break ◽  
Independent Variables ◽  
Gelatin Films ◽  
Film Forming ◽  
Central Composite Experimental Design ◽  
Central Composite

In this study, we developed a starch-gelatin film incorporated with synthesized curcumin to be used as a pH-sensitive smart material for food packaging. The film-forming mixture contained five components: starch, gelatin, glycerol, acetic acid and curcumin. The interactions of the components and their effects on the film properties were investigated by using response surface methodology with central composite experimental design. The results showed impacts of the contents of these components as independent variables on tensile strength, elongation at break, Young’s modulus and solubility of the films. The contents of starch, gelatin and glycerol significantly affect these properties, while acetic acid and curcumin do not (p<0.05). Also, it was shown that the incorporation of curcumin provided the film with the capacity to sense pH changes from neutral to basic (yellow at pH ≤ 8 and orange-red at pH ≥ 9).

Fish gelatin films laminated with emulsified gelatin film or poly(lactic) acid film: Properties and their use as bags for storage of fried salmon skin

2021 ◽  
Vol 111 ◽  
pp. 106199 ◽  
Author(s):  
Krisana Nilsuwan ◽  
Pedro Guerrero ◽  
Koro de la Caba ◽  
Soottawat Benjakul ◽  
Thummanoon Prodpran
Keyword(s):  
Lactic Acid ◽  
Gelatin Film ◽  
Poly Lactic Acid ◽  
Fish Gelatin ◽  
Film Properties ◽  
Gelatin Films

scholarly journals Micro-spectroscopy of HKUST-1 metal–organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host–guest chemistry and electrical conductivity

2019 ◽  
Vol 21 (46) ◽  
pp. 25678-25689 ◽  
Author(s):  
Miguel Rivera-Torrente ◽  
Matthias Filez ◽  
Christian Schneider ◽  
Ewout C. van der Feltz ◽  
Konrad Wolkersdörfer ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Spatial Distribution ◽  
Water Vapor ◽  
Metal Organic Framework ◽  
Next Generation ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework ◽  
Guest Chemistry

Guest@MOF materials have potential in next-generation materials for electroconductive devices. Micro-spectroscopy studies of TCNQ@HKUST-1 electroconductive composites revealed the effects of spatial distribution and water vapor on this material.

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