Chitosan/Polyvinyl Alcohol/SiO2 Nanocomposite Films: Physicochemical and Structural Characterization

In the present study, the effects of the two ratios of polyvinyl alcohol /Chitosan (1:1 and 3:1) and nano-silicon dioxide (nano-SiO2) (0, 0.5, and 1%) on structural and physicochemical properties of PVA/Chitosan/ nano-SiO2 nanocomposite films were investigated. Our findings showed that the treatments' water solubility (WS) in the presence of nano-SiO2 and higher PVA content was decreased, and the lowest amount was in P3C1-1% (59%). The addition of silica nanoparticles decreased the water vapor permeability (WVP) of films, and the lowest amount of WVP was for treatment with a ratio of 1:1 of PVA/chitosan and 1% nano-SiO2 (P3C1-1%) which was 3.08× 10-10 g m s-1m-2 Pa. Tensile strength (Ts) value was achieved 35.86 MPa in higher PVA content and 1% of nano-SiO2 (P3C1-1%) which was the highest. However, the light transmission value of all treatments did not differ greatly. According to the FTIR results, the appropriate interaction between both polymers and nano-SiO2 was observed in the concentration of 1% nano-SiO2 in P1C1. Eventually, significant improvement of structural and physicochemical properties of the films could achieve in higher PVA content and concentration of 1% of nano-SiO2. Based on these results, these nanocomposite films could be considered suitable for the packaging sector and preserve food quality.

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Improving the Performance of Feather Keratin/Polyvinyl Alcohol/Tris(hydroxymethyl)Aminomethane Nanocomposite Films by Incorporating Graphene Oxide or Graphene

Nanomaterials ◽

10.3390/nano10020327 ◽

2020 ◽

Vol 10 (2) ◽

pp. 327 ◽

Cited By ~ 1

Author(s):

Shufang Wu ◽

Xunjun Chen ◽

Tiehu Li ◽

Yingde Cui ◽

Minghao Yi ◽

...

Keyword(s):

Graphene Oxide ◽

Polyvinyl Alcohol ◽

Water Vapor Permeability ◽

Nanocomposite Films ◽

Light Transmittance ◽

Vapor Permeability ◽

Blend Films ◽

Feather Keratin ◽

Degradation Temperature ◽

Bionanocomposite Films

In this study, feather keratin/polyvinyl alcohol/tris(hydroxymethyl)aminomethane (FK/PVA/Tris) bionanocomposite films containing graphene oxide (GO) (0.5, 1, 2, and 3 wt%) or graphene (0.5, 1, 2, and 3 wt%) were prepared using a solvent casting method. The scanning electron microscopy results indicated that the dispersion of GO throughout the film matrix was better than that of graphene. The successful formation of new hydrogen bonds between the film matrix and GO was confirmed through the use of Fourier-transform infrared spectroscopy. The tensile strength, elastic modulus, and initial degradation temperature of the films increased, whereas the total soluble mass, water vapor permeability, oxygen permeability, and light transmittance decreased following GO or graphene incorporation. In summary, nanoblending is an effective method to promote the application of FK/PVA/Tris-based blend films in the packaging field.

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Improving Thermal, Mechanical, and Barrier Properties of Feather Keratin/Polyvinyl Alcohol/Tris(hydroxymethyl)aminomethane Nanocomposite Films by Incorporating Sodium Montmorillonite and TiO2

Nanomaterials ◽

10.3390/nano9020298 ◽

2019 ◽

Vol 9 (2) ◽

pp. 298 ◽

Cited By ~ 4

Author(s):

Shufang Wu ◽

Xunjun Chen ◽

Minghao Yi ◽

Jianfang Ge ◽

Guoqiang Yin ◽

...

Keyword(s):

Polyvinyl Alcohol ◽

Three Dimensional ◽

Water Vapor Permeability ◽

Barrier Properties ◽

Nanocomposite Films ◽

Light Transmittance ◽

Vapor Permeability ◽

Hydroxyl Groups ◽

Sodium Montmorillonite ◽

Feather Keratin

In this study, feather keratin/polyvinyl alcohol/tris(hydroxymethyl)aminomethane (FK/PVA/Tris) bionanocomposite films containing two types of nanoparticles, namely one-dimensional sodium montmorillonite (MMT) clay platelets (0.5, 1, 3, and 5 wt%) and three-dimensional TiO2 nanospheres (0.5, 1, 3, and 5 wt%), are prepared using solvent casting method. X-ray diffraction studies confirm the completely exfoliated structure of FK/PVA/Tris/MMT nanocomposites. The successful formation of new hydrogen bonds between the hydroxyl groups of the film matrix and the nanofillers is confirmed by Fourier transform infrared spectroscopy. The tensile strength, elongation at break, and initial degradation temperature of the films are enhanced after MMT and TiO2 incorporation. The water vapor permeability, oxygen permeability, and light transmittance decrease with increase in TiO2 and MMT contents. In summary, nanoblending is an effective method to promote the application of FK/PVA/Tris blend films in the packaging field.

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Conducting/biodegradable chitosan-polyaniline film; Antioxidant, color, solubility and water vapor permeability properties

Main Group Chemistry ◽

10.3233/mgc-210007 ◽

2021 ◽

Vol 20 (2) ◽

pp. 133-147

Author(s):

Sajad Pirsa ◽

Behzad Mohammadi

Keyword(s):

Water Vapor ◽

Food Packaging ◽

Water Solubility ◽

Light Transmission ◽

Antioxidant Properties ◽

Chitosan Film ◽

Water Vapor Permeability ◽

Vapor Permeability ◽

Surface Color ◽

Synthesis Time

In this study, chitosan-polyaniline nanocomposite film was prepared in combination with different concentrations of polyaniline at various synthesis times. Surface morphology, antioxidant properties, water solubility, water vapor permeability (WVP), color properties and light transparency properties of the films were investigated. The size, shape and morphology of the synthesized particles were examined with scanning electron microscopy (SEM) technique. The results indicated that the synthesized polyaniline particles were spherical and in the range of 45–70 nm. The results obtained from the study of the effect of polyaniline on the physical properties of the chitosan film showed that increasing polyaniline concentration and synthesis time causes a decrease in the rate of the water solubility and water vapor permeability. This is an important factor in expanding its use in food packaging. The results of the colorimetric studies showed that the polyaniline sharply changed the surface color of the film. Polyaniline also increased antioxidant properties of composite film. Investigating the light transmission and transparency of the films showed that the polyaniline reduced the transparency and transmission of light, which could be used to package products that are susceptible to oxidation in the light.

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Physical and Barrier Properties of Polylactic Acid/Halloysite Nanotubes-Titanium Dioxide Nanocomposites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1021.280 ◽

2021 ◽

Vol 1021 ◽

pp. 280-289

Author(s):

Abdulkader M. Alakrach ◽

Awad A. Al-Rashdi ◽

Mohamed Khalid Al-Omar ◽

Taha M. Jassam ◽

Sam Sung Ting ◽

...

Keyword(s):

Water Vapor ◽

Food Packaging ◽

Water Solubility ◽

Water Vapor Permeability ◽

Barrier Properties ◽

Halloysite Nanotubes ◽

Nanocomposite Films ◽

Vapor Permeability ◽

Water Contact ◽

Film Density

In this study, PLA/TiO2 and PLA/HNTs-TiO2 nanocomposites films were fabricated via solution casting method. By testing the film density, solubility, water contact angle and water vapor permeability, the PLA nanocomposite films, the comprehensive performances of the nanocomposites were analysed. The outcomes demonstrated that maximum film density of PLA/TiO2 and PLA/HNTs-TiO2 nanocomposites films increased gradually with the increasing of nanofiller loadings. Moreover, the incorporation of TiO2 and HNTs-TiO2 significantly decreased the water vapor transmittance rate of the nanocomposite films with a slight priority to the addition of HNTs-TiO2, the water solubility was significantly improved with the addition of both nanofillers. Furthermore, the barrier properties were developed with the addition of both TiO2 and HNTs-TiO2 especially after the addition of low nanofiller loadings. Overall, the performance of the PLA/HNTs-TiO2 nanocomposite films was better than that PLA/TiO2 film. Nevertheless, both of the PLA nanocomposite samples achieved the requests of food packaging applications.

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Preparation and optimization of Starch/Poly vinyl alcohol/ ZnO nanocomposite films applicable for food packaging

10.21203/rs.3.rs-526313/v1 ◽

2021 ◽

Author(s):

Saeed Yari ◽

Jamshid Mohammadi-Rovshandeh ◽

Mohsen Shahrousvand

Keyword(s):

Tensile Strength ◽

Polyvinyl Alcohol ◽

Food Packaging ◽

Film Formation ◽

Water Vapor Permeability ◽

Good Choice ◽

Nanocomposite Films ◽

Poly Vinyl Alcohol ◽

Vapor Permeability ◽

Factors Affecting

Abstract Pollution and destruction of the environment due to the accumulation of non-degradable plastics are some of the most important concerns in the world. A significant amount of this waste is related to the polymers used in food packaging. Therefore, in recent years, experts in the food industry have been looking for suitable biodegradable alternatives to synthetic polymers. Preparing biocompatible and biodegradable films based on starch is a good choice. In this study, various factors affecting films of starch/polyvinyl alcohol (PVA)/ containing ZnO nanoparticles such as the amount of starch, PVA, glycerol, and ZnO were evaluated by response surface methodology (RSM). Film formation, mechanical properties, swelling, solubility, and water vapor permeability (WVP) were selected as responses of RSM. The results showed that hydrogen bonding interactions between polyvinyl alcohol and starch improved the film formation. The effect of glycerol and PVA content on the mechanical strength was contrary to each other. As the amount of PVA increased, the tensile strength first decreased and then increased. The value of WVP was for all Runs from 0 to 6.77 × 10− 8 gm− 1s− 1Pa− 1. Finally, films with high film formation, maximum tensile strength, and high elongation at break, minimum solubility, permeability, and swelling were optimized.

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Effect of incorporation of blackberry particles obtained by freeze drying on physicochemical properties of edible films

Proceedings of 21th International Drying Symposium ◽

10.4995/ids2018.2018.7807 ◽

2018 ◽

Author(s):

Rafael Augustus De Oliveira ◽

Gislaine Ferreira Nogueira ◽

Farayde Matta Fakhouri

Keyword(s):

Physicochemical Properties ◽

Water Solubility ◽

Research Work ◽

Water Vapor Permeability ◽

Gum Arabic ◽

Edible Films ◽

Vapor Permeability ◽

Vapour Permeability ◽

Freeze Dried ◽

Arrowroot Starch

This research work aimed to evaluate the physicochemical properties of arrowroot starch films plasticized with glycerol and incorporated in film-forming solution directly (D) and by sprinkling (S) with 0%, 20%, 30%, 40% (mass blackberry solids / biopolymer mass) of blackberry pulp (BL) powder and freeze dried microencapsulated blackberry pulp (ML) using mixture of gum arabic and arrowroot starch (1: 1, mass / mass). Thickness, water solubility and water vapour permeability of the films significantly increased with increasing concentration of blackberry powder. Compared to arrowroot starch film (0%), the surface of films with BL and ML powder became irregular and rough. Keywords: Lyophilization; microstructure; water solubility; water vapor permeability; packing.

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Mechanical and Barrier Properties of Composite Films Based on Kappa-Carrageenan-Polyvinyl Alcohol

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f1090.0986s319 ◽

2019 ◽

Vol 8 (6S3) ◽

pp. 489-499

Keyword(s):

Tensile Strength ◽

Water Vapor ◽

Moisture Content ◽

Polyvinyl Alcohol ◽

Water Solubility ◽

Composite Films ◽

Water Vapor Permeability ◽

Vapor Permeability ◽

Burst Strength ◽

Kappa Carrageenan

Optimization of film formula-based kappa-carrageenan and polyvinyl alcohol (PVA) was studied using a two-level, two-factor Design Expert 11® by Response Surface Methodology (RSM) Central Composite Design (CCD). The aim of this study was to obtain the optimal concentration of kappa-carrageenan and polyvinyl alcohol in producing films. The influence composition ⱪ-carrageenan and polyvinyl alcohol was characterized. The results showed the effects of k-carrageenan and polyvinyl alcohol had a significant effect on the response thickness, tensile strength, burst strength, elongation, solubility, water vapor barrier, opacity, color, and moisture content. The optimized condition for production k-carrageenan and PVA was 1.21% carrageenan and 1.93% polyvinyl alcohol, which was giving film with thickness 0.044 mm, tensile strength 16.69 MPa, burst strength 167.86 kPa, elongation 81.79%, water solubility 65.04%, water vapor permeability 7.49 g/m s Pa x 10-11, opacity 2.31, ΔE 2.42, and moisture content 19.13%

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

Journal of Polymer Engineering ◽

10.1515/polyeng-2020-0071 ◽

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.

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Characterization of Food Packaging Films with Blackcurrant Fruit Waste as a Source of Antioxidant and Color Sensing Intelligent Material

Molecules ◽

10.3390/molecules26092569 ◽

2021 ◽

Vol 26 (9) ◽

pp. 2569

Author(s):

Mia Kurek ◽

Nasreddine Benbettaieb ◽

Mario Ščetar ◽

Eliot Chaudy ◽

Maja Repajić ◽

...

Keyword(s):

Food Packaging ◽

Water Solubility ◽

Color Change ◽

Chitosan Film ◽

Water Vapor Permeability ◽

Vapor Permeability ◽

Color Changes ◽

Insoluble Particles ◽

Polymer Stability ◽

Food Packaging Films

Chitosan and pectin films were enriched with blackcurrant pomace powder (10 and 20% (w/w)), as bio-based material, to minimize food production losses and to increase the functional properties of produced films aimed at food coatings and wrappers. Water vapor permeability of active films increased up to 25%, moisture content for 27% in pectin-based ones, but water solubility was not significantly modified. Mechanical properties (tensile strength, elongation at break and Young’s modulus) were mainly decreased due to the residual insoluble particles present in blackcurrant waste. FTIR analysis showed no significant changes between the film samples. The degradation temperatures, determined by DSC, were reduced by 18 °C for chitosan-based samples and of 32 °C lower for the pectin-based samples with blackcurrant powder, indicating a disturbance in polymer stability. The antioxidant activity of active films was increased up to 30-fold. Lightness and redness of dry films significantly changed depending on the polymer type. Significant color changes, especially in chitosan film formulations, were observed after exposure to different pH buffers. This effect is further explored in formulations that were used as color change indicators for intelligent biopackaging.

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Pea protein isolate nanocomposite films for packaging applications: effect of starch nanocrystals on the structural, morphological, thermal, mechanical and barrier properties

Emirates Journal of Food and Agriculture ◽

10.9755/ejfa.2020.v32.i7.2124 ◽

2020 ◽

pp. 495

Author(s):

Viviane Machado Azevedo ◽

Ana Carolina Salgado De Oliveira ◽

Soraia Vilela Borges ◽

Josiane Callegaro Raguzzoni ◽

Marali Vilela Dias ◽

...

Keyword(s):

Corn Starch ◽

Water Vapor Permeability ◽

Protein Isolate ◽

Nanocomposite Films ◽

Vapor Permeability ◽

Coating Materials ◽

Performance Properties ◽

Pea Protein ◽

Starch Nanocrystals ◽

Pea Protein Isolate

Abstract: Studies have been made to explore the utilization of pea proteins in terms of edible film and coating materials. The reinforcement of biopolymer films with plant-based nanocrystals has been applied in order to improve their performance properties. The objective was to evaluate the effect of the incorporation of corn starch nanocrystals (SN) (0-15%) in pea protein isolate films. Thermal analysis showed that the addition of up to 5% starch nanocrystals increased thermal stability. A 22.3% decrease was observed in water vapor permeability with the addition of SN. Increasing the SN concentration altered the arrangement of the structure to interleaved, in the matrix, as seen in transmission micrographs. This study showed that the use of corn starch nanocrystals as reinforcement in pea protein films had an effect on the films. The incorporation of up to 10% SN is suggested in order to increase the performance properties of pea protein isolate films.

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