Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

Miranda, Cleidiene Souza de; Ferreira, Marina S.; Magalhães, M. T. Q.; Gonçalves, Ana Paula Bispo; Oliveira, Jamerson Carneiro de; Guimarães, Danilo Hansen; José, Nadia Mamede

doi:10.1590/1516-1439.370414

Cited by 20 publications

(17 citation statements)

References 23 publications

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“…5-a that increasing lignin from 2% to 6% and 10% results in the increase of the TS by 13.5% and 16.8%, respectively. Similar results were reported by other researchers who used the solution casting method [13][14][15][16][17]25] and melt extrusion method [18] in preparing the film. Adding 1% to 20% of lignin to starch was able to increase the tensile strength of the starch-based film by 2.9 to 86.3% [15][16][17][18].…”

Section: -1-1-effect Of Mixing Temperature On Film Propertiessupporting

confidence: 90%

“…Many researchers observed that the incorporation of lignin into PVA could increase the tensile strength of the biodegradable plastic [12][13][14]. In addition, lignin was also reported improving the tensile strength of starch-based biodegradable plastic [15][16][17][18]. However, as far as the literature survey has been performed, there is a very limited number of publications about the effect of lignin addition on the mechanical properties of PVA/starch-based biodegradable plastic [19].…”

Section: -Introductionmentioning

confidence: 99%

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Response Surface Methodology for Formulating PVA/Starch/Lignin Biodegradable Plastic

et al. 2022

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The use of petroleum-based plastics has raised environmental issues as more plastic waste enters and accumulates in the environment. It has led to the development of biodegradable plastics. Starch is one of the potential materials to make biodegradable plastic, but starch-based plastic has poor mechanical strength. Blending starch with poly(vinyl alcohol) (PVA) and lignin is expected to improve the mechanical properties of the plastic. Biodegradable plastic films from PVA/starch/lignin blends with glycerol as a plasticizer were prepared using an internal mixer for compounding and a hot press molding machine for film making. The percentage of lignin (2-10%), glycerol (25-65%), and mixing temperature (190-230 oC) were varied according to the three levels of the Box-Behnken design. The ANOVA evaluation revealed that glycerol had the most significant effect on the mechanical properties of the film. Then, three models for the estimation of tensile strength, elongation at break, and tear resistance were developed. As expected, the models satisfactorily predict the effect of all input variables on the response variables. The optimum conditions for preparing the film were acquired from the equations, namely 197.6 oC for the temperature, 10% for lignin, and 45.1% for glycerol. The biodegradable plastic prepared using the optimum conditions possessed a tensile strength of 8.46 ± 1.08 MPa, an elongation at break of 139.00 ± 8.59%, and a tear resistance of 69.50 ± 2.50 N/mm. These values are in good agreement with the predicted values. Doi: 10.28991/ESJ-2022-06-02-03 Full Text: PDF

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Section: -1-1-effect Of Mixing Temperature On Film Propertiessupporting

confidence: 90%

Section: -Introductionmentioning

confidence: 99%

Response Surface Methodology for Formulating PVA/Starch/Lignin Biodegradable Plastic

et al. 2022

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“…The results indicated that the addition of lignin significantly improved the elastic modulus and the maximum stress by about 4200% and 840%, respectively, compared to the sample without lignin. Moreover, lignin caused the rougher surface of the film, modified some structural properties, and improved thermal properties [88]. Stevens et al (2010) have prepared novel starch-KL foams.…”

Section: Application Of Lignin In Bioplasticsmentioning

confidence: 99%

Applications of Lignocellulosic Fibers and Lignin in Bioplastics: A Review

2019

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Lignocellulosic fibers and lignin are two of the most important natural bioresources in the world. They show tremendous potential to decrease energy utilization/pollution and improve biodegradability by replacing synthetic fibers in bioplastics. The compatibility between the fiber-matrix plays an important part in the properties of the bioplastics. The improvement of lignocellulosic fiber properties by most surface treatments generally removes lignin. Due to the environmental pollution and high cost of cellulose modification, focus has been directed toward the use of lignocellulosic fibers in bioplastics. In addition, lignin-reinforced bioplastics are fabricated with varying success. These applications confirm there is no need to remove lignin from lignocellulosic fibers when preparing the bioplastics from a technical point of view. In this review, characterizations of lignocellulosic fibers and lignin related to their applications in bioplastics are covered. Then, we generalize the developments and problems of lignin-reinforced bioplastics and modification of lignin to improve the interaction of lignin-matrix. As for lignocellulosic fiber-reinforced bioplastics, we place importance on the low compatibility of the lignocellulosic fiber–matrix. The applications of lignin-containing cellulose and lignocellulosic fibers without delignification in the bioplastics are reviewed. A comparison between lignocellulosic fibers and lignin in the bioplastics is given.

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“…The amylose chains rearrange into a double helix conformation during the drying of the film [53]. According to Souza de Miranda et al [54], the peak found at 2θ = 17° represents the crystallization of the amylose chains, whereas the one at 2θ = 19.5° represents the crystallization of the amylopectin chains.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Starch-Leather Waste Gelatin Films Cross-Linked with Glutaraldehyde

et al. 2020

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Gelatin extracted from chromium-tanned leather wastes (CTLW) has a lower molar mass because of the more aggressive extraction process needed to disrupt chromium-collagen bonds when compared to gelatin extracted from the bones, skin, and connective tissues of animals. As a consequence, CTLW gelatin is more hydrophilic, thus it is harder to apply in the production of polymers. To overcome this issue, in this study, films produced with starch, CTLW gelatin, commercial gelatin (as a comparative), and their blends were cross-linked with glutaraldehyde. The cross-linking reduced the crystallinity of the films, impairing the reorganization of gelatin chains into a triple helix structure, which balanced the effect of the higher molecular chain, while not altering the films' tensile strength. It increased the elongation at break and reduced the solubility and the swelling degree by up to 53% and 69%, respectively. These results stand as a great advance for the practical use of starch-CTLW gelatin films.

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Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

Cited by 20 publications

References 23 publications

Response Surface Methodology for Formulating PVA/Starch/Lignin Biodegradable Plastic

Response Surface Methodology for Formulating PVA/Starch/Lignin Biodegradable Plastic

Applications of Lignocellulosic Fibers and Lignin in Bioplastics: A Review

Starch-Leather Waste Gelatin Films Cross-Linked with Glutaraldehyde

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