A Comparative Investigation of the Surface Properties of Corn-Starch-Microfibrillated Cellulose Composite Films

Żołek‐Tryznowska, Zuzanna; Bednarczyk, Ewa; Tryznowski, Mariusz; Kobiela, Tomasz

doi:10.3390/ma16093320

Cited by 9 publications

(3 citation statements)

References 49 publications

(51 reference statements)

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“…An increase was observed in the presence of bleached and unbleached nanofibers and a decrease in the presence of nanocrystals. The addition of microfibrillated cellulose (MFC) increased the surface roughness and polarity of the starch/MFC materials developed [ 90 ]. Velásquez-Castillo et al (2023) reported that in starch films reinforced with 5.0 and 7.5 wt% quinoa starch nanocrystals [ 91 ], roughness increased with the presence of nanocellulose.…”

Section: Resultsmentioning

confidence: 99%

Thermoplastic Starch Biocomposite Films Reinforced with Nanocellulose from Agave tequilana Weber var. Azul Bagasse

Lomelí-Ramírez,

Reyes-Alfaro,

Martínez-Salcedo

et al. 2023

Polymers

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In this work, cellulose nanocrystals (CNCs), bleached cellulose nanofibers (bCNFs), and unbleached cellulose nanofibers (ubCNFs) isolated by acid hydrolysis from Agave tequilana Weber var. Azul bagasse, an agro-waste from the tequila industry, were used as reinforcements in a thermoplastic starch matrix to obtain environmentally friendly materials that can substitute contaminant polymers. A robust characterization of starting materials and biocomposites was carried out. Biocomposite mechanical, thermal, and antibacterial properties were evaluated, as well as color, crystallinity, morphology, rugosity, lateral texture, electrical conductivity, chemical identity, solubility, and water vapor permeability. Pulp fibers and nanocelluloses were analyzed via SEM, TEM, and AFM. The water vapor permeability (WVP) decreased by up to 20.69% with the presence of CNCs. The solubility decreases with the presence of CNFs and CNCs. The addition of CNCs and CNFs increased the tensile strength and Young’s modulus and decreased the elongation at break. Biocomposites prepared with ubCNF showed the best tensile mechanical properties due to a better adhesion with the matrix. Images of bCNF-based biocomposites demonstrated that bCNFs are good reinforcing agents as the fibers were dispersed within the starch film and embedded within the matrix. Roughness increased with CNF content and decreased with CNC content. Films with CNCs did not show bacterial growth for Staphylococcus aureus and Escherichia coli. This study offers a new theoretical basis since it demonstrates that different proportions of bleached or unbleached nanofibers and nanocrystals can improve the properties of starch films.

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Section: Resultsmentioning

confidence: 99%

Thermoplastic Starch Biocomposite Films Reinforced with Nanocellulose from Agave tequilana Weber var. Azul Bagasse

Lomelí-Ramírez,

Reyes-Alfaro,

Martínez-Salcedo

et al. 2023

Polymers

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“…We previously showed the procedure in our works, for example, see [36]. The reagents (10 g of starch, 5 g of glycerol in 200 g of water) were heated up to 95 • C upon stirring with a mechanical stirrer and cast onto Teflon ® plates placed on a K Paint Applicator (RK Print, Royston, UK) equipped with an adjustable micrometer spreader gap set to 3 mm with a constant coating speed (6 m•min −1 ).…”

Section: Film Preparationmentioning

confidence: 99%

Study on the Printability of Starch-Based Films Using Ink-Jet Printing

Żołek-Tryznowska,

Piłczyńska,

Murawski

et al. 2024

Materials

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Starch-based films are a valuable alternative to plastic materials that are based on fossil and petrochemical raw resources. In this study, corn and potato starch films with 50% glycerol as a plasticizer were developed, and the properties of films were confirmed by mechanical properties, surface free energy, surface roughness, and, finally, color and gloss analyses. Next, the films were overprinted using ink-jet printing with quick response (QR) codes, text, and pictograms. Finally, the print quality of the obtained prints was determined by optical density, color parameters, and the visual evaluation of prints. In general, corn films exhibit lower values of mechanical parameters (tensile strength, elongation at break, and Young Modulus) and water transition rate (11.1 mg·cm−2·h−1) than potato starch film (12.2 mg·cm−2·h−1), and water solubility is 18.7 ± 1.4 and 20.3 ± 1.2% for corn and potato film, respectively. The results obtained for print quality on starch-based films were very promising. The overprinted QR codes were quickly readable by a smartphone. The sharpness and the quality of the lettering are worse on potato film. At the same time, higher optical densities were measured on potato starch films. The results of this study show the strong potential of using starch films as a modern printing substrate.

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“…It is worth remembering that PLA also has some limitations. It is a relatively brittle material compared to some other materials [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Properties of Composites Based on Polylactide Filled with Cork Filler

Fabijański

2024

J. Compos. Sci.

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Introducing fillers into polymeric materials is one of the methods of modifying the properties or reducing the costs of polymeric materials. Thanks to their use, it is possible to obtain new materials with interesting mechanical and chemical properties. Some features are often improved among the new materials obtained, while others deteriorate. In this work, an attempt was made to obtain a polymer composite based on PLA filled with cork flour in amounts of 5%, 10%, 15%, 20% and 30% by weight. The processing and sample preparation process using injection molding technology was assessed and the basic mechanical properties were assessed. The research shows that it is possible to obtain PLA products with a cork filler without the mixing process on an extruder, but only by using an injection molding machine and appropriately selecting the parameters of the technological process. Tests of mechanical properties showed deterioration of parameters, but not to such an extent that the obtained composites were disqualified from use in products that are not subject to heavy mechanical loads. The undoubted advantage of the obtained materials is maintaining their so-called “green” character and thus the ability to biodegrade.

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A Comparative Investigation of the Surface Properties of Corn-Starch-Microfibrillated Cellulose Composite Films

Cited by 9 publications

References 49 publications

Thermoplastic Starch Biocomposite Films Reinforced with Nanocellulose from Agave tequilana Weber var. Azul Bagasse

Thermoplastic Starch Biocomposite Films Reinforced with Nanocellulose from Agave tequilana Weber var. Azul Bagasse

Study on the Printability of Starch-Based Films Using Ink-Jet Printing

Properties of Composites Based on Polylactide Filled with Cork Filler

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