scholarly journals Exploration of Multifunctional Properties of Piper Betel Leaves Extract Incorporated Polyvinyl Alcohol-Oxidized Maize Starch Blend Films for Active Packaging Application

2021 ◽  
Author(s):  
Vishram D Hiremani ◽  
Naganagouda Goudar ◽  
Tilak Gasti ◽  
Sheela Khanapure ◽  
Vinayak N Vanjeri ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Oxygen Permeability ◽  
Transmission Rate ◽  
Uv Spectroscopy ◽  
Antioxidant Properties ◽  
Active Packaging ◽  
Water Soluble ◽  
Maize Starch ◽  
Water Contact ◽  
Blend Films

Abstract This study explains the development of eco-friendly polyvinyl alcohol (PVA)/oxidized maize starch (OMS)/Betel leaves extract (BLE) blend films by employing a cost effective technique. The influence of BLE on structural, Thermal, Mechanical, Morphological, Optical, Antibacterial, and Antioxidant properties of PVA/OMS blend were investigated successfully by applying FTIR, TGA, DSC, UTM, SEM, UV spectroscopy, In vitro antibacterial and DPPH scavenging activity. The hydrogen bonding interaction among the components of the blend films led to enhance thermal stability, miscibility, mechanical properties, smooth surface morphology and UV blocking properties of the blend films. The addition of BLE enormously improved the antibacterial and antioxidant properties of PVA/OMS blend films. Moreover, the water contact angle, solubility, biodegradability, Water vapour transmission rate, oxygen permeability properties of blend films were analyzed, which illustrates that the obtained films were hydrophilic, water soluble and biodegradable in nature. With regard to barrier properties the WVTR and oxygen permeability of the blend films were enhanced after doping of BLE. These experimental outcomes suggest that the BLE containing PVA/OMS films can be used for the expansion of active packaging material.

scholarly journals Mechanical, optical and antioxidant properties of 7-Hydroxy-4-methyl coumarin doped polyvinyl alcohol/oxidized maize starch blend films

2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Vishram D. Hiremani ◽  
Sarala Sataraddi ◽  
Praveen K. Bayannavar ◽  
Tilak Gasti ◽  
Saraswati P. Masti ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Antioxidant Properties ◽  
Maize Starch ◽  
Blend Films

scholarly journals Gum Arabic/Gelatin and Water-Soluble Soy Polysaccharides/Gelatin Blend Films as Carriers of Astaxanthin—A Comparative Study of the Kinetics of Release and Antioxidant Properties

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1062
Author(s):  
Katarzyna Łupina ◽  
Dariusz Kowalczyk ◽  
Waldemar Kazimierczak
Keyword(s):  
Release Rate ◽  
Antioxidant Properties ◽  
Gum Arabic ◽  
Blocking Agent ◽  
Water Soluble ◽  
Polymer Blending ◽  
Blend Films ◽  
Time Required ◽  
Kinetics Of ◽  
Active Substances

Polymer blending and incorporation of active substances offer a possibility of generation of novel packaging materials with interesting features. Astaxanthin is one of the most powerful antioxidants. Hence, in this study, water-soluble AstaSana astaxanthin (AST) was incorporated into 75/25 gum arabic/gelatin (GAR75/GEL25) and water-soluble soy polysaccharides/gelatin (WSSP75/GEL25) blend films in different concentrations (0, 0.25%, 0.5%, 1%). Microscope images showed good compatibility between the polysaccharides and GEL. Basing on time required for 50% release, the WSSP-based film exhibited an approximately four-fold slower release rate (t50% = 65.16–142.80 min) than the GAR-based film (t50% = 14.64–34.02 min). This result was mainly ascribed to the slower dissolution of the WSSP-based carrier. The faster release rate of the GAR-based films resulted in stronger antioxidant activity (quarter-scavenging time (t25%ABTS) = 0.22–7.51 min) in comparison to the WSSP-based films (t25%ABTS = 0.91–12.94 min). The increase in the AST concentration was accompanied by gradually reduced solubility and the release rate. It is possible that the increasing number of starch granules (from the AST formulation) acted as a dissolution blocking agent. In general, the WSSP75/GEL25 film displayed the most linear (the Zero-order similar) release profile. So, this carrier has potential for release of AST at a quasi-constant speed.

Characterization of Mechanical and Thermal Properties of Glycerol Mixed Oxidized Maize Starch/Polyvinyl alcohol Blend Films.

2020 ◽  
Vol 28 ◽  
pp. 100416
Author(s):  
Vishram D. Hiremani ◽  
Tilak Gasti ◽  
Sarala Sataraddi ◽  
Vinayak N. Vanjeri ◽  
Naganagouda Goudar ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Mechanical And Thermal Properties ◽  
Maize Starch ◽  
Blend Films

scholarly journals Polyvinyl Alcohol-Few Layer Graphene Composite Films Prepared from Aqueous Colloids. Investigations of Mechanical, Conductive and Gas Barrier Properties

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 858 ◽  
Author(s):  
Benoit Van der Schueren ◽  
Hamza El Marouazi ◽  
Anurag Mohanty ◽  
Patrick Lévêque ◽  
Christophe Sutter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Transmission Rate ◽  
Composite Films ◽  
Barrier Properties ◽  
Water Soluble ◽  
Gas Barrier ◽  
Layer Graphene ◽  
Few Layer Graphene

Quasi all water soluble composites use graphene oxide (GO) or reduced graphene oxide (rGO) as graphene based additives despite the long and harsh conditions required for their preparation. Herein, polyvinyl alcohol (PVA) films containing few layer graphene (FLG) are prepared by the co-mixing of aqueous colloids and casting, where the FLG colloid is first obtained via an efficient, rapid, simple, and bio-compatible exfoliation method providing access to relatively large FLG flakes. The enhanced mechanical, electrical conductivity, and O2 barrier properties of the films are investigated and discussed together with the structure of the films. In four different series of the composites, the best Young’s modulus is measured for the films containing around 1% of FLG. The most significant enhancement is obtained for the series with the largest FLG sheets contrary to the elongation at break which is well improved for the series with the lowest FLG sheets. Relatively high one-side electrical conductivity and low percolation threshold are achieved when compared to GO/rGO composites (almost 10−3 S/cm for 3% of FLG and transport at 0.5% FLG), while the conductivity is affected by the formation of a macroscopic branched FLG network. The composites demonstrate a reduction of O2 transmission rate up to 60%.

Ultraviolet blocking and antioxidant polyvinyl alcohol films incorporated with baicalin extraction from Scutellaria baicalensis Georgi

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jinshu Liu ◽  
Xiaoyan Ma ◽  
Wenzhao Shi ◽  
Jianwei Xing ◽  
Chaoqun Ma ◽  
...  
Keyword(s):  
Water Vapor ◽  
Polyvinyl Alcohol ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Water Vapor Permeability ◽  
Scutellaria Baicalensis ◽  
Vapor Permeability ◽  
Protective Film ◽  
Uv Blocking

Abstract Baicalin, an active flavonoid ingredient of Scutellaria baicalensis Georgi, was extracted by heat reflux extraction and showed the same significance UV absorption property with standard baicalin. Active films were prepared from polyvinyl alcohol (PVA) containing baicalin extract by casting method. The effect of baicalin extracts on the UV-blocking, optical, antioxidant property, water vapor permeability, swelling and mechanical properties of the films were studied. UV–vis transmittance spectra showed that PVA films incorporated with baicalin extract blocked ultraviolet light range from 280–400 nm even with low concentration of baicalin (0.5 wt%) and maintain the high transparency in visible spectrum. The outstanding UV-blocking properties of PVA films incorporated with baicalin extract were also confirmed by Rhodamine B degradation. Baicalin conferred antioxidant properties to PVA films as determined by DPPH radical scavenging activity. Due to the interaction between hydroxy groups of baicalin and PVA molecule, water vapor permeability, swelling and elongation at break of the films were decreased accompanied with the increasing in tensile strength and Young’s modulus. FTIR reveal that the interaction between PVA molecules was significant changed by the introduction of baicalin. These results suggest that PVA film incorporated with baicalin extract can be used for the development of functional protective film.

scholarly journals Lignin-Containing Coatings for Packaging Materials—Pilot Trials

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1595
Author(s):  
Asif Javed ◽  
Peter Rättö ◽  
Lars Järnström ◽  
Henrik Ullsten
Keyword(s):  
High Speed ◽  
Water Solubility ◽  
Transmission Rate ◽  
Kraft Lignin ◽  
Packaging Materials ◽  
Water Contact ◽  
Pilot Trials ◽  
Significant Difference ◽  
Ph Level ◽  
Ammonium Zirconium Carbonate

One severe weakness of most biopolymers, in terms of their use as packaging materials, is their relatively high solubility in water. The addition of kraft lignin to starch coating formulations has been shown to reduce the water solubility of starch in dry coatings. However, lignin may also migrate into aqueous solutions. For this paper, kraft lignin isolated using the LignoBoost process was used in order to examine the effect of pH level on the solubility of lignin with and without ammonium zirconium carbonate (AZC). Machine-glazed (MG) paper was coated in a pilot coating machine, with the moving substrate at high speed, and laboratory-coated samples were used as a reference when measuring defects (number of pinholes). Kraft lignin became soluble in water at lower pH levels when starch was added to the solution, due to the interactions between starch and lignin. This made it possible to lower the pH of the coating solutions, resulting in increased water stability of the dry samples; that is, the migration of lignin to the model liquids decreased when the pH of the coating solutions was reduced. No significant difference was observed in the water vapor transmission rate (WVTR) between high and low pH for the pilot-coated samples. The addition of AZC to the formulation reduced the migration of lignin from the coatings to the model liquids and led to an increase in the water contact angle, but also increased the number of pinholes in the pilot-coated samples.

Antioxidant properties of merlot wines in water soluble and lipid soluble free radical generating systems

2000 ◽  
Vol 151 (1) ◽  
pp. 309
Author(s):  
R.S. Faustino ◽  
S. Sobrattee ◽  
T.A. Clark ◽  
G.N. Pierce
Keyword(s):  
Free Radical ◽  
Antioxidant Properties ◽  
Water Soluble
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