Development and physical-chemical properties of pectin film reinforced with spent coffee grounds by continuous casting

Mendes, Juliana Farinassi; Martins, Jéssica Trindade; Manrich, Anny; Neto, Alfredo Rodrigues de Sena; Pinheiro, Ana Carla Marques; Mattoso, L. H. C.; Martins, Maria Alice

doi:10.1016/j.carbpol.2019.01.058

Cited by 90 publications

(31 citation statements)

References 55 publications

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“…The FTIR spectra of neat pectin, CBSE-2 and active pectin-based films exhibited distinctive peaks in the 4000-500 cm −1 range. The PC film (Figure 3) showed a broad peak centred at 3281 cm −1 which was attributed to O-H stretching vibrations [11], while bands centred at 2894 and 2849 cm −1 were related to C-H stretching vibrations of methylene groups and methyl group of pectin polymer chains, respectively [80]. The intense bands observed at 1738 and 1603 cm −1 were associated with the ester stretching vibrations of the -COCH 3 group and the asymmetric stretching vibrations of the carboxylate anion -COO − , giving an indication of the high methoxylation of the pectin molecules [19,81].…”

Section: Atr-ftir Analysismentioning

confidence: 99%

Pectin-Based Films with Cocoa Bean Shell Waste Extract and ZnO/Zn-NPs with Enhanced Oxygen Barrier, Ultraviolet Screen and Photocatalytic Properties

Mellinas

Jiménez

Garrigós

2020

Foods

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In this work, pectin-based active films with a cocoa bean shell extract, obtained after waste valorisation of residues coming from the chocolate production process, and zinc oxide/zinc nanoparticles (ZnO/Zn-NPs) at different concentrations, were obtained by casting. The effect of the active additive incorporation on the thermal, barrier, structural, morphological and optical properties was investigated. Moreover, the photocatalytic properties of the obtained films based on the decomposition of methylene blue (MB) in aqueous solution at room temperature were also studied. A significant increase in thermal and oxidative stability was obtained with the incorporation of 3 wt% of ZnO/Zn-NPs compared to the control film. The addition of 5 wt% cocoa bean shell extract to pectin significantly affected the oxygen barrier properties due to a plasticizing effect. In contrast, the addition of ZnO/Zn-NPs at 1 wt% to pectin caused a decrease in oxygen transmission rate per film thickness (OTR.e) values of approximately 50% compared to the control film, resulting in an enhanced protection against oxidation for food preservation. The optical properties were highly influenced by the incorporation of the natural extract but this effect was mitigated when nanoparticles were also incorporated into pectin-based films. The addition of the extract and nanoparticles resulted in a clear improvement (by 98%) in UV barrier properties, which could be important for packaged food sensitive to UV radiation. Finally, the photocatalytic activity of the developed films containing nanoparticles was demonstrated, showing photodegradation efficiency values of nearly 90% after 60 min at 3 wt% of ZnO/Zn-NPs loading. In conclusion, the obtained pectin-based bionanocomposites with cocoa bean shell waste extract and zinc oxide/zinc nanoparticles showed great potential to be used as active packaging for food preservation.

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Section: Atr-ftir Analysismentioning

confidence: 99%

Pectin-Based Films with Cocoa Bean Shell Waste Extract and ZnO/Zn-NPs with Enhanced Oxygen Barrier, Ultraviolet Screen and Photocatalytic Properties

Mellinas

Jiménez

Garrigós

2020

Foods

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“…As the concentration of added RPE increased, the thickness of CJP films increased from 0.078 to 0.092 mm. An increase in film thickness is mainly due to the increased number of solids in the film matrix with the incorporation of RPE [26]. With increasing RPE content, TS and YM decreased and EB increased.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…This can be explained by the orange-red color of rambutan peel [8]. Mendes et al [26] reported that the color and transparency of pectin films was changed by the incorporation of spent coffee grounds, and they were affected by its amount, the interactions of phenolic compounds and the Maillard reaction during film preparation. UV-visible light transmittance, which represents the light-blocking ability of CJP films, is shown in Figure 3.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…However, the film surface became rough and uneven, and white aggregates were observed with the addition of RPE. These white aggregates were generated by the sedimentation of RPE particles during film drying [26]. Viana et al [29] reported that pectin films with guava puree or mango puree had a rough and irregular surface compared to the neat film because of the complex property of purees.…”

Section: Sem Analysismentioning

confidence: 99%

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Development and Characterization of Citrus Junos Pomace Pectin Films Incorporated With Rambutan (Nephelium Lappaceum) Peel Extract

Song

2020

Coatings

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New packaging materials using biopolymers have been studied to substitute synthetic packaging materials that lead to environmental pollution. In this study, a new biodegradable packaging material was developed using the pectin extracted from Citrus junos pomace, which is considered a food processing byproduct. Rambutan peel extract (RPE), at different concentrations (0.25%, 0.5%, and 1.0%), was added as an active material, and the functional properties of the C. junos pectin (CJP) films were evaluated. The incorporation of RPE enhanced the extensibility of the CJP films and their light-blocking ability by decreasing light transmittance. As the concentration of RPE increased, antioxidant activities of the CJP films increased, along with an increase in total phenolic content. Subsequently, the CJP prepared in this study can be used as a low-cost active biodegradable film material, and RPE can be added as a natural antioxidant for the CJP films to confer antioxidant activity.

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“…As described in the supporting information file (Table S1 and Figure S1). Diameters and fiber lengths were obtained from optical microscope (MO) images and measured with ImageJ software using at least 100 measurements of each sample 40 …”

Section: Methodsmentioning

confidence: 99%

Effects of short fibers and processing additives on HDPE composites properties reinforced with Pinus and Eucalyptus fibers

Mendes

Castro

Corrêa

et al. 2020

J of Applied Polymer Sci

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This work aimed to investigate the effect of adding short fibers of Pinus and Eucalyptus, in different granulometry (24 and 200 mesh) and concentration (0–20 m/m), combined with processing aid Struktol TPW104 (S) in obtaining of high‐density polyethylene (HDPE) composites. Overall, obtaining composites from short fibers caused relevant changes in the HDPE matrix, such as thermal stability, moisture barrier. In comparison to pure HDPE, the composites incorporated with 20% m/m of fibers, regardless of the type, decreased the melting temperature to 128°C and a wider crystallization temperature range. Another significant observation was the improvement of composites mechanical profile after adding the additive, the highest values were obtained for composites HDPEL20PS (35%—TS e 651%—EM) and HDPEL20ES (42%—TS e 681%—EM), showing good interaction and compatibility, according to scanning electron microscopy (SEM) images. The same was verified with the mechanical results of flexion and impact. Therefore, the use of short fibers and processing aid was successful providing augmented mechanical properties and thermal stability, without negatively affecting their essential properties for industrial applications.

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Development and physical-chemical properties of pectin film reinforced with spent coffee grounds by continuous casting

Cited by 90 publications

References 55 publications

Pectin-Based Films with Cocoa Bean Shell Waste Extract and ZnO/Zn-NPs with Enhanced Oxygen Barrier, Ultraviolet Screen and Photocatalytic Properties

Pectin-Based Films with Cocoa Bean Shell Waste Extract and ZnO/Zn-NPs with Enhanced Oxygen Barrier, Ultraviolet Screen and Photocatalytic Properties

Development and Characterization of Citrus Junos Pomace Pectin Films Incorporated With Rambutan (Nephelium Lappaceum) Peel Extract

Effects of short fibers and processing additives on HDPE composites properties reinforced with Pinus and Eucalyptus fibers

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