Exploration of Multifunctional Properties of Piper betel Leaves Extract Incorporated Polyvinyl Alcohol-Oxidized Maize Starch Blend Films for Active Packaging Applications (original) (raw)
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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.
SN Applied Sciences
In the present study, the different weight ratios of 7-hydroxy-4-methyl coumarin (7H4MC) mixed polyvinyl alcohol (PVA)/ oxidized maize starch (OMS) blend films were achieved by the solvent casting method and coded as PSC. The prepared film samples were characterized by employing techniques such as FTIR, UTM, and SEM. The film samples were also subjected to their wettability, biodegradation and migration rate studies. Experimental outcomes showed that strong intermolecular hydrogen bonding between components of the blend films contribute to increase the mechanical properties, smoother surface morphology, increase in surface hydrophobicity, improvement in biodegradability, and exhibited migration rates below the overall migration limit (OML). Furthermore, moisture content, density, optical properties, water absorption, water solubility, water vapour transmission rate and antioxidant properties are discussed in detail. With all these properties, PVA/OMS/7H4MC blend films have the potential to use as packaging material.
NIPES Journal of Science and Technology Research, 2019
In this study various ratios of polyvinyl alcohol (PVOH) and maize starch (MS) were casted on petri dishes. Then biodegradability of the polymer films prepared was investigated based on their ability to absorb polar solvent (water) and non-polar solvents benzene and xylene. The absorption test revealed that the polymer films of MS blend and PVOH/MS blend ratios of 4:6 permitted more diffusion rate of water to saturation at every time interval of 1 hour giving rise to their increased sizes; whereas in benzene and xylene media the polymer film ratios showed less diffusion rate and absorption. In polar solvent, the unblended PVOH and the blended 6:4 ratio in the polymer films exhibited less diffusion rate and absorption. The polymer films with 4:6 ratios show greater strength against disintegration in polar solvent. The probability coefficients P>0.05 were obtained from ANOVA test F(4,20) = 0.733, P = 0.580; F(4,20) = 2.79, P = 0.540; and F(4,20) = 2.46, P = 0.790 for polymer films immersed in water, benzene and xylene respectively. This implies that there were significant differences in mean data distributions for the polymer film ratios on diffusion and absorption of the various solvents used. This study also revealed that MS can be blended into a synthetic polymer like polyvinyl alcohol to produce packing material with biodegradable potentials.
Improving Biodegradability of Polyvinyl alcohol/Starch Blend films for Packaging Applications
2014
Polyvinyl alcohol (PVA) was blended with starch (S) in presence of glacial acetic acid as crosslinking agent. The effect of blend ratio and molecular weight of PVA on the physical, thermal and mechanical properties of PVA/S blends were investigated using various techniques such as DSC, TGA, SEM, tensile strength, and solubility tests. Furthermore, biodegradability of the blend films was also studied. In addition, FTIR spectroscopy was used to check the hydrogen bonding interaction between PVA and S in the blends. The obtained results showed that the physico-mechanical properties are strongly dependent on the molecular weight and PVA content in PVA/S blends. DSC and SEM analyses of PVA/S blend showed a single glass transition temperature indicating the formation of completely miscible blends with a single phase due to the formation of hydrogen bonds between the hydroxyl groups of PVA and starch. In addition, PVA/S blend films exhibited good mechanical properties, thermal stability as compared with the pure PVA. More interestingly, the results showed enhancement in biodegradability of PVA/S blend films and particularly in moist soil, which can be exploited for manufacturing of biodegradable and environmentally friendly packaging materials at low cost.
2017
To satisfy the need of developing eco-friendly flexible antimicrobial packaging film with minimum use of synthetic chemical ingredients, the present study examined the efficacy of citric acid (CA) as crosslinking agent and essential oils (EOs), viz., cinnamon essential oil (CEO) and oregano essential oil (OEO) as natural antimicrobials in corn starch-polyvinyl alcohol (CS-PVA) film. Compared to film prepared from filmogenic solution (FS) containing 75 kg CS+8.75 kg PVA+24.6 kg glycerol per m3 FS, film additionally containing CA at 0.07 kg/kg CS indicated 95% higher ultimate tensile strength (UTS) and 27% lower water vapor permeability (WVP). Film developed with incorporation of CEO and OEO at 1.875 m3 in 100 m3 FS (CS:PVA= 8.5:1) containing CA at 0.07 kg/kg CS exhibited antimicrobial action against Staphylococcus aureus. Added advantage was, both EOs could reduce WVP of film with no EO by about 50%, though CEO exhibited better antimicrobial action. Structural alteration in film matr...
Iranian Polymer Journal, 2022
To achieve eco-friendly polysaccharide-based blend films, the different weight percentages of chitosan (CH) and oxidized maize starch (OMS) were mixed and the blend films were fabricated by employing the solution casting method. The interaction between the components of the blend films were confirmed by Fourier transform infrared spectroscopy. The presence of hydrogen bonding interaction enhanced the elongation of the blend films from 3.430 ± 0.75% to 43.26 ± 1.21%. The results from the differential scanning calorimetry exhibited a single glass transition temperature for all the films, depicting that the components of the blend films are miscible over the entire composition. Barrier properties such as water vapor transmission rate and oxygen permeability of the blend films were reduced after the inclusion of the OMS into CH. A decrease in the transmittance percentage of the blend films compared to neat CH film was observed, which helps to reduce oxidative deterioration in packed food products caused by UV radiation. The transparency of the films decreased at lower weight percentage of OMS and showed higher transparency as the amount of OMS increased in the blend matrix. The XRD results revealed that the prepared films are amorphous in nature. All the prepared films exhibited a smooth and homogeneous surface morphology which was confirmed by the SEM analysis. The moisture content, water absorption capacity, water solubility and soil degradation of the blend films decreased in contrast with pristine CH film. Hence, the prepared films have the potential to be used for food packaging applications.
Corn-starch/polyvinyl alcohol bio-composite film for food packaging application
SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019, 2019
Bio-composite films of corn-starch/poly (vinyl alcohol) (St/PVA) were prepared by using glycerol as a plasticizer by the solution casting method. The different ratios of St/PVA taken were (30/70,70/30,60/40). The test was designed to study the impact of different ratios of starch and PVA on the properties of the bio-composite film. This study have uncovered that the starch and polyvinyl alcohol weight proportion of 30:70 was best blending composition. Different composites of these compositions were consolidated and combined to test the achievability of the prepared polymer. Agglomeration of starch and PVA matrix resulted into weak intermolecular hydrogen bond and the tensile strength and elongation at break decreased from 37.91 MPa to 22.52 MPa and 333.48 to 223.42 when starch percentage increased from 30% to 70% whereas the water absorption capacity and degradation rate increases by ~52 % and ~ 22%, respectively.Biodegradation study was led by covering the prepared polymer under the soil and microorganism liable for its debasement was recognized. The outcomes affirmed that synthesised films could be utilized as an excellent material for food packaging.
Highly water resistant cassava starch/poly(vinyl alcohol) films
International Journal of Biological Macromolecules, 2019
Biodegradable films were prepared based on cassava starch (CS) and poly(vinyl alcohol) (PVA). To increase its tensile strength and flexibility, CS (20-60 wt%) was blended with PVA at various weight ratios (80-40 wt%). Triethylamine (TEA) was added as a homogeneous catalyst to increase intermolecular interaction and induce miscibility between CS and PVA. The crystallinity and hydrophobicity of blend films containing 20 wt% CS were promoted by the elimination of residual acetate groups in PVA. The number of hydrogen bonds in these blend films increased, which led to stronger interaction and more compact molecular packing between CS and PVA chains. The poor water resistance that limits the shelf-life and applications of CS blends was improved. The addition of TEA to blend films containing 20 wt% CS increased water resistance by 80% and tensile strength by as much as 440%. The development of greater structural integrity yielded ecologically sustainable, low-cost, biodegradable films with excellent physical and mechanical properties.
Polymers
In the present study, various blended films from polyvinyl alcohol (PVA) and pinto bean starch (PBS) were prepared and the selected film was used to fabricate an antimicrobial packaging film. Different essential oils (EOs) were also exposed to minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) tests to find the most efficient EO against a range of microorganisms. From the primary studies, the PVA:PBS (80:20) and cinnamon essential oil (CEO) were chosen. Afterward, the blend composite film reinforced by 1, 2, and 3% CEO and several, physical, mechanical, structural, and antimicrobial attributes were scrutinized. The results showed a significant modification of the barrier and mechanical properties of the selected blended films as a result of CEO addition. Scanning electron micrographs confirmed the incorporation and distribution of CEO within the film matrix. The X-ray diffraction (XRD) patterns and Fourier transform infrared (FTIR) spectra indicated ...