Fabrication and properties of thermoplastic starch/montmorillonite composite using dialdehyde starch as a crosslinker

Peidayesh, Hamed; Ahmadi, Zahed; Khonakdar, Hossein Ali; Abdouss, Majid; Chodák, Ivan

doi:10.1002/pi.5955

Cited by 47 publications

(26 citation statements)

References 84 publications

(123 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, the better dispersion of the CB particles in the TPS matrix leads to a substantial enhancement of the storage modulus of the TPS-CB composite. This explanation corresponds with the results from other published data for TPS composites filled with clay particles [38,39], including our previous publication [16]. The loss modulus and tan δ curves are presented in Figure 4b,c, showing a more complex evolution of the thermomechanical behavior in the presence of CB.…”

Section: Dynamic Mechanical Thermal Analysis (Dmta)supporting

confidence: 91%

“…However, to be used as a plastic material, it must be processable by standard plastic technologies. Thermoplastic starch (TPS) is a plasticized version of starch that can be obtained by the destruction of starch granules in the presence of plasticizers under heat and shear conditions [16][17][18]; however, the main shortcomings of TPS are its hydrophilic character, unsatisfactory mechanical properties, and poor thermal stability compared to conventional polymers [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

et al. 2021

Self Cite

View full text Add to dashboard Cite

Conductive polymer composites (CPC) from renewable resources exhibit many interesting characteristics due to their biodegradability and conductivity changes under mechanical, thermal, chemical, or electrical stress. This study is focused on investigating the physical properties of electroconductive thermoplastic starch (TPS)–based composites and changes in electroconductive paths during cyclic deformation. TPS–based composites filled with various carbon black (CB) contents were prepared through melt processing. The electrical conductivity and physicochemical properties of TPS–CB composites, including mechanical properties and rheological behavior, were evaluated. With increasing CB content, the tensile strength and Young’s modulus were found to increase substantially. We found a percolation threshold for the CB loading of approximately 5.5 wt% based on the rheology and electrical conductivity. To observe the changing structure of the conductive CB paths during cyclic deformation, both the electrical conductivity and mechanical properties were recorded in parallel using online measurements. Moreover, the instant electrical conductivity measured online during mechanical deformation of the materials was taken as the parameter indirectly describing the structure of the conductive CB network. The electrical conductivity was found to increase during five runs of repeated cyclic mechanical deformations to constant deformation below strain at break, indicating good recovery of conductive paths and their new formation.

show abstract

Section: Dynamic Mechanical Thermal Analysis (Dmta)supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Starch and its derivatives have attracted many researchers for expanding biopolymer industries since they are cost‐effective, renewable, abundant in nature, and biodegradable . However, some limitations exist in the properties of starch including poor mechanical properties, high hydrophilicity, fragility, and poor dimensional stability . To improve the quality and also broaden the application areas of starch, these drawbacks need to be reduced significantly.…”

Section: Introductionmentioning

confidence: 99%

Baked hydrogel from corn starch and chitosan blends cross‐linked by citric acid: Preparation and properties

Peidayesh

Ahmadi

Khonakdar

et al. 2020

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

Citric acid (CA)-modified hydrogels from corn starch and chitosan were synthesized using a semidry condition. This strategy has great benefits of friendly environment because of the absence of organic solvents and compatible with the industrial process. The hydrogel blends were prepared with starch/chitosan ratios of 75/25, 50/50, and 25/75. The thermal stability, morphology, water absorption, weight loss in water, and methylene blue absorption were determined. Multi-carboxyl structure of CA could result in a chemical cross-linking reaction between starch, chitosan, and CA. The cross-linking reaction between free hydroxyl groups of starch, amino groups of chitosan, and carboxyl groups of CA has been confirmed by attenuated total reflectance infrared (ATR-IR) spectroscopy, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) analysis. The water absorption properties of CA-modified hydrogel blends were increased significantly compared with the native starch and chitosan. Moreover, the hydrogel blends modified with CA showed good water resistance and gel content. The morphology study confirmed the complete chemical cross-linking and porous structure of hydrogel blends. The hydrogel blend with the starch/chitosan ratio of 50/50 presented powerful absorption of methylene blue as well as chemical cross-linking reaction and dense structure. In sum, the hydrogel blend comprising 50% starch and 50% chitosan has the potential to be applied for water maintaining at large areas, for example, in agriculture. K E Y W O R D S chitosan, citric acid, crosslinking, hydrogel, starch 1 | INTRODUCTION Hydrogels are extremely hydrophilic polymer networks, either synthetic (petrochemical based) or natural (biopolymers), which are usually stabilized through covalent bonds or noncovalent interactions among the macromolecule chains known as cross-linking. 1-4 Hydrogels will swell when placed in water and can retain an extensive fraction of water within their spatial structures without dissolving. 5 A gel structure forms within the polymer melt after cross-linking. Currently, a wide range of natural polymer hydrogels such as starch, chitosan, collagen, and cellulose have been described as suitable biomaterials for pharmaceutical and biomedical applications because of their biocompatibility, low-toxicity, and biodegradability. 6-10Starch and its derivatives have attracted many researchers for expanding biopolymer industries since they are cost-effective, renewable, abundant in nature, and biodegradable. 11-14 However, some limitations exist in the properties of starch including poor mechanical properties, high hydrophilicity, fragility, and poor dimensional stability. [15][16][17][18][19] To improve the quality and also broaden the application areas of starch, these drawbacks need to be reduced significantly.Chitosan, isolated from chitin, is another polysaccharide that is abundant in nature and available in large quantities. Chitosan is biocompatible, biodegradable, biofunctional, and antimicrobial. [20][21][22] Mo...

show abstract

“…Natural nanoclay and organically modified nanoclay are largely uses to develop TPS nanocomposites. [ 11–14 ]…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Degradation Properties of Thermoplastic Starch Reinforced Nanocomposites

2022

View full text Add to dashboard Cite

Fossil oil derived materials exhibit non‐degradable properties with a limited availability. To overcome these limitations, a biodegradable starch/poly(ε‐caprolactone) based Coloisite‐20A nanocomposites are developed in this research study. The overall performance of these newly developed nanocomposite materials is deeply investigated. First, the morphological analysis of the nanocomposites is examined using X‐ray diffraction, transmission electron microscopy, and atomic force microscopy. Thereafter, mechanical performance of the nanocomposites is analyzed through tensile and flexural tests. The water‐based contact angle and sorption testing are conducted to confirm the hydrophobic or hydrophilic nature of the nanocomposite. Finally, the degradation behavior of this nanocomposite is estimated by the soil‐burial tests followed by Fourier transform infrared analysis, field emission electron microscopy, and transmission electron microscopy. All the experiments are performed for the control and the test samples. The developed nanocomposites exhibit maximum tensile strength of 6.30 MPa with a water sorption of 6.08% for a 24 h of water immersion tests. On the other hand, the soil‐burial degradation reflects a maximum weight loss of 45.4% after 56 days of degradation period. Hence, moderately hydrophobic, low strength, biodegradable hybrid nanocomposites are developed to counter the use of non‐degradable plastic composites.

show abstract

Fabrication and properties of thermoplastic starch/montmorillonite composite using dialdehyde starch as a crosslinker

Cited by 47 publications

References 84 publications

Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

Baked hydrogel from corn starch and chitosan blends cross‐linked by citric acid: Preparation and properties

Mechanical and Degradation Properties of Thermoplastic Starch Reinforced Nanocomposites

Contact Info

Product

Resources

About