Synthesis and characterization of starch/chitosan composites

Karua, Chetan Shekhar; Sahoo, Abanti

doi:10.1016/j.matpr.2020.02.878

Cited by 10 publications

(9 citation statements)

References 17 publications

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“…Chitosan-based films and coatings have been recently intensively studied [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. Most of the research has been focused on evaluating different preparation conditions (including the processing method) and incorporation of additives to improve the properties of composites.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, blends of chitosan/PVA, chitosan/starch, or chitosan/lignin have been greatly studied as promising materials for industrial applications [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Polymer blends of chitosan and PVA exhibited good thermal stability, unique morphology and reduced solubility in acid solution.…”

Section: Introductionmentioning

confidence: 99%

“…Polymer blending by mixing two natural biopolymers (chitosan and starch) with PVA was investigated in the following studies [ 16 , 17 , 18 ]. The infrared spectra confirmed the good compatibility of PVA with chitosan/starch composite [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…The infrared spectra confirmed the good compatibility of PVA with chitosan/starch composite [ 16 ]. Additionally, several beneficial effects of PVA addition to the composite were observed: an increase of film flexibility and elongation at break [ 16 ], pore disappearance and smoothing of the surface [ 17 ], and improved mechanical and functional properties without the loss of biodegradability [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…Taking into account the versatility of thermomechanical processing, we used this method to fabricate chitosan/starch composites with lignin and PVA. To the best of our knowledge, similar composites have been only obtained by conventional casting methods [ 16 , 17 , 18 ]. Moreover, every previous work describing thermomechanical-processed chitosan [ 19 , 20 ] was associated with its low content in the composite.…”

Section: Introductionmentioning

confidence: 99%

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Environmentally Friendly Melt-Processed Chitosan/Starch Composites Modified with PVA and Lignin

et al. 2021

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Chitosan/starch-based composites were prepared by thermomechanical processing as an alternative to the traditional solution method, with the aim of fabricating environmentally friendly materials on a larger scale. Different contents and types of lignin and poly(vinyl alcohol), PVA were incorporated into chitosan/starch compositions to improve their mechanical properties. It was demonstrated that the presence of both lignin and PVA increases the values of tensile strength and elongation at break of the composites. Moreover, it was observed that by the selection of a type of lignin and PVA, it was possible to tailor the internal microstructure of the samples. As observed in scanning electron microscope (SEM) micrographs, the introduction of lignin and PVA resulted in the formation of a smooth surface and homogeneous samples.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Environmentally Friendly Melt-Processed Chitosan/Starch Composites Modified with PVA and Lignin

et al. 2021

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Characterization of films and film‐forming solutions of chitosan/thermoplastic rice starch associations: Role of starch oxidation and plasticizer type in the molecular interactions

Horn,

Amaro Martins,

de Guzzi Plepis

2023

Polymer Engineering & Sci

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Polysaccharide films are alternative sources to replace fossil‐based compounds. This study aimed to use rice starch modified by gelatinization and oxidation processes. Different properties were observed after blending it with chitosan and polyols, as evaluated on the film‐forming solutions by rheology. The interaction between chitosan and oxidized starch appeared higher, as the plasticizers exhibited a low effect on the rheological behavior. Polyols played an essential role in chitosan/gelatinized associations, driven by the number of OH groups. Films were evaluated by thermogravimetry (TGA), differential scanning calorimetry (DSC), water vapor permeability (WVP), water solubility, and tensile tests. The effect of the plasticizer type on chitosan/gelatinized starch was related to an increase in the temperature of the endothermic peak observed by DSC, confirming the role of hydroxyl groups of polyols in the polymer–polymer chain associations. The WVP and solubility decreased with starch oxidation due to increased chitosan–starch interactions. The decrease in tensile strength with adding polyols was correlated to reduced direct interactions between chitosan and starch chains. A drop of about 77% in elongation at break was observed in chitosan/oxidized starch film. On the other hand, elongation at break increased by around 14% in films with sorbitol (SO).Highlights Starch oxidation reduces the viscosity of film‐forming solutions. The number of OH groups influences the gelation point measured by rheology. The WVP is reduced in oxidized starch/chitosan associations. Plasticizers enhanced the elongation at break of polysaccharide films.

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