Biodegradable polymer blends based on corn starch and thermoplastic chitosan processed by extrusion

Mendes, Juliana Farinassi; Paschoalin, Rafaella T.; Carmona, Vitor Brait; Neto, Alfredo Rodrigues de Sena; Marques, Amanda; Marconcini, J. M.; Mattoso, Luiz H. C.; Medeiros, Eliton S.; Oliveira, Juliano Elvis de

doi:10.1016/j.carbpol.2015.10.093

Cited by 335 publications

(171 citation statements)

References 43 publications

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“…The improvement of the mechanical properties of thermoplastic starch has been investigated by many researchers in recent years. Mendes et al (2016) developed the effect of incorporating thermoplastic chitosan (TPC) in a thermoplastic cornstarch (TPS) matrix on the mechanical properties of this material. The results show that it was possible to produce successfully corn starchchitosan blends by extrusion with high dispersion of the thermoplastic.…”

Section: Resultsmentioning

confidence: 99%

Effect of natural fibres on the mechanical properties of thermoplastic starch

Oniszczuk

Wójtowicz

Moácicki

et al. 2016

International Agrophysics

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A b s t r a c t. This paper presents the results covering the mechanical properties of thermoplastic potato starch granules with flax, cellulose fibre, and pine bark addition. A modified single screw extrusion-cooker TS-45 with L/D = 18 and an additional cooling section of the barrel was used as the processing unit. The establishment influence of the fibre addition, as well as the extrusion-cooker screw speed, on the mechanical properties of the thermoplastic starch granules was the main objective of the investigation. The maximum force during compression to 50% of the sample diameter, elastic modulus, and compression strength were evaluated. Significant differences were noted depending on the amount of fibre used, while only an insignificant influence of screw speed on the mechanical properties of the granulate was reported. An increased amount of fibres lowered the maximum force as well as the elastic modulus and compression strength of the thermoplastic starch granulates.

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Section: Resultsmentioning

confidence: 99%

Effect of natural fibres on the mechanical properties of thermoplastic starch

Oniszczuk

Wójtowicz

Moácicki

et al. 2016

International Agrophysics

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“…Other work produced biodegradable polymer blends based on corn starch and thermoplastic chitosan extrusion processed, the resultant material presented a homogeneous fracture surface without the presence of starch granules or chitosan aggregates. Although the incorporation of thermoplastic chitosan caused a decrease in both tensile strength and stiffness, films with better extensibility and thermal stability were produced (Mendes et al, 2016). The previous research found that surface structure of chitosan/banana flour without crosslinking and prepare by casting method was exhibit big gel matrix particle because of retrogradation forms granula (Pitak & Rakshit,2011).…”

Section: Introductionmentioning

confidence: 99%

The effect of the crosslinking agent on physical and mechanical properties of Chitosan / Banana flour sheet

Waisarikit¹,

Ross²,

Ross³

et al. 2017

j.appsci

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This research studied the effect of the cross-linking agent on physical and mechanical properties of Chitosan / Banana flour sheets. The Chitosan / Banana flour sheets were prepared by compression molding at 130 o C for 2 minutes, using 15% gelatinized banana flour with propane 1,2-diol (plasticizer) mixed with 1.5% chitosan solution and boric acid used as the cross-linking agent with varied amounts (0%, 0.5%, 1%, 1.5% and 2%) based on dry starch content. The mixture was stirred until compatible and then dried and reduced in size at room temperature. For the final step, the product was prepared by compression molding in order to study physical (compatibility, humidity and color parameter) and mechanical properties (tensile testing) of the sheets. The Chitosan / Banana flour sheets mixed with boric acid showed an increase in miscibility between banana flour and chitosan as seen in the SEM images and improved flexibility of the sheets. The results presented show that the incorporation of boric acid into the Chitosan / Banana flour sheet improved the compatibility, mechanical properties, humidity stability and appearance of the material, a cross-linking content of 1.5% gave the best overall improvement. With these improved properties this Chitosan / Banana flour sheet can be applied to be used as a biodegradable food packaging material.

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“…Starch-based bioplastic have been employed several sources, such as banana [1], potato [2], sago [2][3][4][5], rice [6], corn [7], soybean [8], and cassava [9]. Cassava starch has been broadly utilized to be used in bioplastic reinforced with clay nanoparticles [9], thermoplastic chitosan [7], poly lactic acid [10], gelatin [11], bamboo nanofibrils [12], bacterial cellulose [13], and green coconut fiber [14] in order to overcome drawbacks of starch-based bioplastic, such as mostly water-soluble, low resitancy, and low mechanical property. Cassava starch production generates by-product [9], i.e cassava bagasse or pulp consisted a fibrous material containing 30-60% residual starch [15].…”

Section: Introductionmentioning

confidence: 99%