Biopolymer-Based Films from Sodium Alginate and Citrus Pectin Reinforced with SiO2

Júnior, Luís Marangoni; Fozzatti, Camila Rodrigues; Jamróz, Ewelina; Vieira, Roniérik Pioli; Alves, Rosa Maria Vercelino

doi:10.3390/ma15113881

Cited by 25 publications

(6 citation statements)

References 40 publications

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“…Additionally, it is noted the presence of whitish spots on the surfaces [Figure 1g,h], and also in the cross sections [Figure 1k,l], at higher proportions of nanosilica, suggesting an incomplete dispersion of nanoparticles along the polymer matrix. Similarly, previous studies have also demonstrated SiO 2 agglomeration through its incorporation in chitosan [28] and in alginate/collagen-based films [20,22]. These research studies reported a proportion of nanosilica at around 10% is considered a determining factor for the appearance of agglomeration and relevant microstructural defects.…”

Section: Morphologysupporting

confidence: 52%

“…Nanosilica is rich in hydroxyl groups (OH), which could interact with biopolymers' matrix through hydrogen bonding [35] as this additive is located between macromolecules. In addition, particle agglomeration may also have influenced this result, which may have acted as an internal lubricant by reducing the frictional forces in the polymeric matrix [19,22]. When the results for the highest concentration of nanosilica (CH/WKG/10%SiO 2 ) are evaluated, a drastic reduction in elongation at break is observed, indicating that concentrations in this range can be considered the thresholds for this additive.…”

Section: Thickness and Mechanical Propertiesmentioning

confidence: 99%

“…Nano-SiO 2 is an amorphous white powder with a three-dimensional structure [17][18][19], which is widely utilized in industry due to its high specific surface area, low toxicity, biocompatibility, optical transparency, and chemical and thermal stability [17,18]. Numerous studies have shown that nanosilica represents an interesting option to improve the mechanical, thermal, and optical properties of biopolymerbased films, including sodium alginate [20,21], alginate/pectin [22], alginate/hydrolyzed collagen [22,23], chitosan [24], potato starch [25], and carboxymethylcellulose [26].…”

Section: Introductionmentioning

confidence: 99%

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Blends of Chitosan and Water Kefir Grain Biomass Incorporated with Nanosilica

et al. 2023

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The use of by-products from the food industry for the development of bioplastics represents an outstanding strategy in meeting current demands for material circularity. In this work, films based on chitosan (CH) and water kefir grain (WKG) biomass incorporated with different concentrations (3%–10% w/w) of nanosilica (SiO2) were developed for the first time. The key properties required for food packaging were assessed. There are no structural changes (FT-IR) upon nanosilica incorporation. However, the XRD analysis indicates a tendency toward an increase in the amorphous character of the films. For the films with higher proportions of nanosilica, the SEM images indicate particle agglomeration points. The control film (CH/WKG) experienced a 5% mass loss at 68.3 °C, while the CH/WKG10%SiO2 film showed the same mass reduction at 75.7 °C, indicating the nanoparticles increased the moisture-associated thermal stability of the films. The tensile strength was not significantly influenced by the incorporation of nanosilica, but there was an increase in elongation at break, from 25.01 ± 3.67% (CH/WKG) to 40.72 ± 4.89% (CH/WKG/3%SiO2), followed by a drastic reduction to 9.10 ± 1.99% (CH/WKG/10%SiO2). Overall, 3% of SiO2 may be the most promising concentration for CH/WKG blends in future application as sustainable alternatives for food packaging, since it is possible to improve properties, such as ductility and thermal stability, at this concentration without marked losses in the tensile strength of the films.

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Section: Morphologysupporting

confidence: 52%

Section: Thickness and Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Blends of Chitosan and Water Kefir Grain Biomass Incorporated with Nanosilica

et al. 2023

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“…3. The peaks at the following wavelengths were verified in accordance with the previous literature: 3320 cm −1 is indicating stretching vibration of the O‐H bond, 2929 and 2877 cm −1 are indicating C‐H bond (alkane) stretching, 1602 and 1411 cm −1 peaks are indicating asymmetric stretching of the carboxylate group (COO − ), 1458 cm −1 is indicating asymmetric stretching of the carboxylate group (COO − ), 1095 cm −1 is indicating strong stretching of OH group and 1028 cm −1 is observed due to glycosidic bond (Makaremi et al ., 2019; Marangoni Júnior et al ., 2022). Additionally, the slight changes observed in the peak intensity can be due to the hydrophobic nature of CEO.…”

Section: Resultsmentioning

confidence: 99%

Development, characterization, and assessment of antioxidant pectin–sodium alginate based edible films incorporated with cassia essential oil

Bhatia

Al‐Harrasi

Jawad

et al. 2023

Int J of Food Sci Tech

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SummaryThis research was conducted in order to develop a sustainable and eco‐friendly pectin–sodium alginate‐based packaging material using natural additives. Cassia essential oil (CEO) is a GRAS‐approved natural preservative and flavouring agent used for a variety of food products. Recent reports revealed the growing interest in using oils in packaging material as natural additives. In the current study, CEO is loaded in pectin–sodium alginate‐based composite films. The main component observed in CEO was cinnamaldehyde which was evaluated by employing gas chromatography–mass spectrometry (GCMS) analysis. Moreover, the incorporation of CEO improved the tensile strength (TS) and elongation at break (EAB) and increased the opacity of the films. However, a decrease in the moisture content, water solubility and water vapour permeability was observed with the incorporation of EO. Additionally, SEM analysis of the CEO‐loaded films revealed an improvement in their morphology. The results of the DPPH and ABTS cation scavenging assays revealed a significant (P ≤ 0.05) increase in antioxidant activity with the incorporation of CEO. These findings indicate that cassia essential oil can be employed as a natural additive to develop edible active packaging material.

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“…Pectin, a homopolymer consisting mainly of galacturonic acid linked by α-1,4-glycosidic bonds, is used in the food industry, cosmetics and personal care products, and the pharmaceutical industry. There are studies in the literature on polyester composites reinforced with natural fibers [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Obtaining Pectin Reinforced Polyester Composite and Investigation of Thermophysical Properties

Karataş

Aydoğmuş

2023

EJOSAT

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In this study, pectin powder is mixed homogeneously in unsaturated polyester (UP). For the production of polyester composite, methyl ethyl ketone peroxide (MEKP) and cobalt octoate (Co Oc) are added to the mixture. The obtained composite is poured into standard molds as a gel and allowed to cure for 24 hours. Some physical and chemical properties of the composite are determined and characterization processes are carried out. Density, Shore D hardness, thermal conductivity coefficient, and thermal stability of polyester composite are examined. According to the results obtained, pectin is used as a filler in the polyester composite. There is no change in the chemical structure of the polyester polymer with Fourier transform infrared (FTIR) spectroscopy. The density of polyester composites decreases as the reinforcement of 0 wt.%, 1 wt.%, 3 wt.%, 5 wt.%, and 7 wt.% pectin powder increases. Besides, the reinforcement of pectin powder as filler reduces Shore D hardness of the polyester composite. However, it has been observed that the thermal conductivity coefficient of the polyester composite increases as the filler ratio rises. In thermal decomposition experiments of the composite, the activation energy decreases slightly as the filler ratio increases. According to the optimization results, 3 wt.% pectin powder supplementation does not adversely affect both the surface morphology and thermophysical properties of the polyester composite.

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Biopolymer-Based Films from Sodium Alginate and Citrus Pectin Reinforced with SiO2

Cited by 25 publications

References 40 publications

Blends of Chitosan and Water Kefir Grain Biomass Incorporated with Nanosilica

Blends of Chitosan and Water Kefir Grain Biomass Incorporated with Nanosilica

Development, characterization, and assessment of antioxidant pectin–sodium alginate based edible films incorporated with cassia essential oil

Obtaining Pectin Reinforced Polyester Composite and Investigation of Thermophysical Properties

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