Preparation and characterization of starch‐based composite films reinforced by corn and wheat hulls

Ali, Amjad; Yu, Long; Liu, Huan; Khalid, Saud; Meng, Linghan; Chen, Ling

doi:10.1002/app.45159

Cited by 67 publications

(38 citation statements)

References 53 publications

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“…This decrease in transparency could be attributed to agglomeration tendency of filler that prevented light transmittance and led to higher opacity. Similar results have been reported earlier in our study that the addition of corn and wheat hulls reduce the transparency of the starch‐based films . Shi et al .…”

Section: Resultssupporting

confidence: 92%

“…On the other hand, high impact strength was mainly contributed by high load force under similar deflection distance. Impact results are in correspondence with tensile results as well as our previous study on corn and wheat hull reinforced films …”

Section: Resultssupporting

confidence: 90%

“…They can be obtained from different agricultural resources such as corn hull, wheat hull and straw, doom, hemp, coir, jute, or particles like almond shells, walnut shell (WNS), rice husks, and cassava peel. Shells from different sources (almond coir, hemp doum fiber, and Walnut) have been used in polypropylene‐based composites to enhance thermomechanical, tensile, and flexural properties of composite materials . The mechanical properties of composites reinforced by fillers depend on dispersion, interfacial adhesion, morphology, and particle size and has a noticeable effect on the mechanical properties .…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of starch‐based composite films reinforced by apricot and walnut shells

Ali

Liu

et al. 2019

J of Applied Polymer Sci

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Starch-based biodegradable films were prepared by using solution-casting method and reinforced by agricultural residues [apricot and walnut shell (APS and WNS) powder]. The powder of both shells was added in different ratios (0, 2.5, 5, 7.5, and 10%) to investigate the microstructures and performances (mechanical and thermal properties) of the starch-based film. Different techniques such as impact, tensile testing, scanning electron microscope, optical microscope (OM), X-ray diffraction (XRD), water vapor transmission rate (WVTR), and dynamic mechanical analysis were applied to study the thermomechanical and barrier properties of the composite films. Results showed that the incorporation of both shells significantly improved the WVTR and mechanical properties of starch-based films. The shells powder was significantly increased the Young's modulus and tensile strength of the starch-based films. Both OM and SEM results showed reasonably good compatibility between starch and reinforced shells. OM and XRD indicated that the APS and WNS not only retained their crystalline structure in the film but they also strengthened the peak intensity of the film. This phenomenon can be used to explain the mechanism of mechanical reinforcement. Since all the components used in the preparation of the films are food grade ingredients, it is expected that the films developed in this work will be used for food packaging applications.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of starch‐based composite films reinforced by apricot and walnut shells

Ali

Liu

et al. 2019

J of Applied Polymer Sci

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“…To overcome this drawback, lemongrass [ 15 ], cinnamon, clove [ 16 , 17 ] and orange [ 18 ] essential oils have been incorporated into starch matrices to reduce water vapor permeability. Among starches, corn, cassava and wheat have been mostly reported to be used in the formulation of biodegradable edible films due to their availability and relative low price [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Olive Extract Addition on Corn Starch-Based Active Edible Films Properties for Food Packaging Applications

Valdés

Álvarez-Pérez

Rojas

et al. 2020

Foods

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Active edible films based on corn starch containing glycerol as a plasticizer and an olive extract obtained from Spanish olive fruit (Olea europaea) by-products (olive extract; OE) at different concentrations (0, 0.05, 0.1 and 0.2 wt%) were prepared by using the casting technique and further solvent-evaporation. OE showed high total phenolic and flavonoids contents and antioxidant activity, which was evaluated by using three different methods: free radical scavenging assay by (1, 1-Dipheny l-2-picrylhydrazyl) DPPH, 2, 2-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ABTS radical inhibition and ferric reducing antioxidant power (FRAP). The incorporation of OE into the corn starch/glycerol matrix underlined the antioxidant potential and antimicrobial effect against E. coli and S. aureus of these novel active films, being noticeable for films added with 0.2 wt% OE. The developed active films showed a clear thermo-oxidative stability improvement with OE incorporation, in particular at 0.2 wt% loading with an increase of around 50 °C in the initial degradation temperature (Tini) and oxidation onset temperature (OOT). The functional properties of control films were also improved with OE addition resulting in a decrease in Young’s modulus, elongation at break, shore D hardness and water vapor permeability. The present work suggested the potential of the developed corn starch-based edible films as low-price and sustainable food packaging systems to prevent the oxidative deterioration of packaged foodstuff while reducing also the generation of olive by-products.

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“…Starch is cheap and readily available. Starch matrix composites have exhibited biocompatibility and biodegradability in medicinal drug release [20]. Chitosan has been reported to neutralize the acidic effect created by the degradation of PLA and improve the ability of PLA to retain mechanical strength during degradation [14].…”

Section: Introductionmentioning

confidence: 99%

The Role of Two-Step Blending in the Properties of Starch/Chitin/Polylactic Acid Biodegradable Composites for Biomedical Applications

et al. 2020

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The current research trend for excellent miscibility in polymer mixing is the use of plasticizers. The use of most plasticizers usually has some negative effects on the mechanical properties of the resulting composite and can sometimes make it toxic, which makes such polymers unsuitable for biomedical applications. This research focuses on the improvement of the miscibility of polymer composites using two-step mixing with a rheomixer and a mix extruder. Polylactic acid (PLA), chitin, and starch were produced after two-step mixing, using a compression molding method with decreasing composition variation (between 8% to 2%) of chitin and increasing starch content. A dynamic mechanical analysis (DMA) was used to study the mechanical behavior of the composite at various temperatures. The tensile strength, yield, elastic modulus, impact, morphology, and compatibility properties were also studied. The DMA results showed a glass transition temperature range of 50 °C to 100 °C for all samples, with a distinct peak value for the loss modulus and factor. The single distinct peak value meant the polymer blend was compatible. The storage and loss modulus increased with an increase in blending, while the loss factor decreased, indicating excellent compatibility and miscibility of the composite components. The mechanical properties of the samples improved compared to neat PLA. Small voids and immiscibility were noticed in the scanning electron microscopy images, and this was corroborated by X-ray diffraction graphs that showed an improvement in the crystalline nature of PLA with starch. Bioabsorption and toxicity tests showed compatibility with the rat system, which is similar to the human system.

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Preparation and characterization of starch‐based composite films reinforced by corn and wheat hulls

Cited by 67 publications

References 53 publications

Preparation and characterization of starch‐based composite films reinforced by apricot and walnut shells

Preparation and characterization of starch‐based composite films reinforced by apricot and walnut shells

Impact of Olive Extract Addition on Corn Starch-Based Active Edible Films Properties for Food Packaging Applications

The Role of Two-Step Blending in the Properties of Starch/Chitin/Polylactic Acid Biodegradable Composites for Biomedical Applications

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