Improving mechanical and water sorption properties of thermoplastic starch by incorporating chitosan filler

Balla, Bence; Bartos, András; Kun, Dávid; Csiszár, Emı́lia; Móczó, János; Fekete, Erika

doi:10.1016/j.polymertesting.2021.107278

Cited by 17 publications

(10 citation statements)

References 34 publications

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“…Chitosan has also been used as a dispersed phase in TPS, incorporating it by thermomechanical methods and without the addition of compatibilizer. The addition of chitosan was found to considerably increase the Young’s modulus and tensile strength [ 20 ]. The addition of inorganic compounds for the mechanical reinforcement of TPS has also been reported.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic Starch-Based Blends with Improved Thermal and Thermomechanical Properties

Estrada‐Monje¹,

Alonso-Romero²,

Zitzumbo-Guzmán³

et al. 2021

Polymers

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This research focused on the development of biomaterials based on cassava starch and corn starch and on the effect of the incorporation of polycaprolactone (PCL) on the thermal and thermomechanical properties of the blends. The results indicated partial compatibility in the blends, especially with cassava starch at a content of 20 wt% as reflected by the maintenance of tensile strength and elongation. In addition, the changes in the crystal quality of PCL and the displacement of the absorption bands of the carbonyl groups of PCL in the infrared (989–1000 cm−1), attributed to the formation of hydrogen bonds between these groups and the hydroxyl groups of starches, were also associated with compatibility. It was observed that the crystallinity of PLC in the presence of cassava and corn starch was 38% and 62%, respectively; a crystallinity greater than that of PCL was related to an improved nucleation at the interface. Based on these properties, the blends are expected to be functional for the manufacture of short-term use products by conventional thermoplastic processing methods.

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Section: Introductionmentioning

confidence: 99%

Thermoplastic Starch-Based Blends with Improved Thermal and Thermomechanical Properties

Estrada‐Monje¹,

Alonso-Romero²,

Zitzumbo-Guzmán³

et al. 2021

Polymers

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“…The hominy contained 70% carbohydrates, of which 8% were fiber. Balla et al reported darkening of injected TPS materials when added with chitosan 11 . The color varied from orange to dark brown as the chitosan content was increased.…”

Section: Resultsmentioning

confidence: 99%

“…Balla et al reported darkening of injected TPS materials when added with chitosan. 11 The color varied from orange to dark brown as the chitosan content was increased. The control material (TPS without chitosan) was transparent yellow, showing that the change in color was linked to the presence of chitosan.…”

Section: Extrusion and Injection Of The Compositesmentioning

confidence: 99%

Biodegradable composites of starch/polyvinyl alcohol/soybean hull (Glycine max L.) produced by thermoplastic injection

Bortolatto

Bittencourt

Yamashita

2022

J of Applied Polymer Sci

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Soybean hull is an agro-industrial residue produced abundantly both in Brazil and worldwide. It is generated during the dehulling of the grains for oil production. This work aimed to develop materials using low-cost, abundant, and biodegradable raw materials, as soybean hull, corn starch, polyvinyl alcohol (PVA), and glycerol. Five formulations of thermoplastic starch (TPS) were produced containing between 4% and 19% of ground soybean hull and another five formulations of the same composition but with 6% PVA added. The materials were extruded and injected to produce specimens. They were analyzed by FTIR-ATR, mechanical tests, mass loss in water, and dimensional variations.The addition of hull to the TPS did not affect the processability of the materials, and the PVA improved the processability. Hull concentration from 8% to

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“…Glycerol and water are usually used for this purpose, and the final thermoplastic starch (TPS) can be prepared by thermomechanical methods (extrusion, injection molding) or from solution by film casting. The main disadvantages of TPS are its hydrophilicity and inadequate mechanical properties, which can be improved by blending TPS with other polymers or fillers [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Since the properties of polymer composites strongly depend on the specific surface area of the filler and the polymer/filler interfacial interaction [ 9 , 11 , 15 , 20 ], it would be interesting to know how these surface properties of NaMMT and laponite influence the structure and properties of the TPS nanocomposites of these clays.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites

2022

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In this research, different clays such as laponite and montmorillonite (NaMMT) are used as fillers in the preparation of thermoplastic starch/clay nanocomposites. Thin films are produced by casting and evaporation in a wide composition range, using glycerol as the plasticizer at two different concentrations. The surface energy of clay fillers is measured by inverse gas chromatography (IGC); X-ray diffraction (XRD) and light transmission measurements (UV-VIS) are carried out to characterize the structure of nanocomposites; and mechanical properties and water vapor permeability are also studied. While all the starch/montmorillonite nanocomposites possess intercalated structures, significant exfoliation can be noted in the starch/laponite nanocomposites, mainly at low clay contents. Due to the larger surface energy of montmorillonite, stronger polymer/clay interactions and better mechanical properties can be assumed in starch/NaMMT composites. The smaller surface energy of laponite, however, can facilitate the delamination of laponite layers. Thus, the specific surface area of laponite can be further increased by exfoliation. Based on the results, the better exfoliation and the much larger specific surface area of laponite lead to higher reinforcement in starch/laponite nanocomposites.

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Improving mechanical and water sorption properties of thermoplastic starch by incorporating chitosan filler

Cited by 17 publications

References 34 publications

Thermoplastic Starch-Based Blends with Improved Thermal and Thermomechanical Properties

Thermoplastic Starch-Based Blends with Improved Thermal and Thermomechanical Properties

Biodegradable composites of starch/polyvinyl alcohol/soybean hull (Glycine max L.) produced by thermoplastic injection

The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites

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