Physical properties of starch plasticized by a mixture of plasticizers

Ivanič, František; Jochec-Mošková, Daniela; Janigová, Ivica; Chodák, Ivan

doi:10.1016/j.eurpolymj.2017.04.006

Cited by 67 publications

(32 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The significant increase of the storage modulus of the crosslinked TPS, TPS/DAS and TPS/DAS/MMT should be attributed to the crosslinking and reinforcement effects of the DAS and MMT layers. This result is in agreement with other published data . With increase of the temperature over T S , α mechanical relaxation related to the glass transition of the polymer matrix takes place, resulting in a step decrease of the storage modulus.…”

Section: Resultsmentioning

confidence: 99%

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

Peidayesh

Ahmadi

Khonakdar

et al. 2020

Polymer International

Self Cite

View full text Add to dashboard Cite

The poor mechanical properties and high water solubility of biodegradable thermoplastic starch (TPS) represent the main disadvantages of TPS in many applications. In this work, TPS film was prepared from a water solution of corn starch modified by 5 wt% dialdehyde starch (DAS) as crosslinking agent and 3 wt% montmorillonite (MMT) as reinforcing additive. Interactions occurring in the TPS films were investigated by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, XRD, DSC, dynamic mechanical thermal analysis (DMTA) and TGA. The results obtained fom FTIR spectroscopy and DSC suggest the formation of hydrogen bond interactions between the hydroxyl group of starch, DAS, the MMT layers and glycerol. DMTA indicated that the relaxation of films with DAS and MMT appears in a higher and broader temperature range due to the starch backbone stiffness; the extreme increase in the storage modulus confirmed the suggested interactions. The determination of the weight loss of the films in water indicated a significant increase of the water resistance of TPS due to incorporation of DAS and MMT. Changes in mechanical properties of the films containing DAS and clay were determined, showing a substantial increase in tensile strength from 2.7 to 6.7 MPa, while Young's modulus increased by 15 times for TPS modified with 5% DAS and 3% MMT. Therefore, the outcomes of this study confirmed that DAS is a suitable biomacromolecule crosslinker for starch and can significantly enhance TPS and TPS/MMT properties. © 2019 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

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

Peidayesh

Ahmadi

Khonakdar

et al. 2020

Polymer International

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

“…This action usually causes a reduction in intermolecular interactions between the adjacent chains of the biopolymer, increasing the mobility of these chains ( Figure 5). Consequently, changes in the material occur, such as increased flexibility, extensibility and distensibility, followed by decreased mechanical strength, glass transition temperature, and gas and water vapor barriers [26,143]. The incorporation of encapsulated plant-derived bioactive compounds into films made of agrobased polymers has also proved to be a viable alternative for improving the mechanical and barrier properties of films based on biodegradable biopolymers.…”

Section: Chitosanmentioning

confidence: 99%

Methods of Incorporating Plant-Derived Bioactive Compounds into Films Made with Agro-Based Polymers for Application as Food Packaging: A Brief Review

et al. 2020

View full text Add to dashboard Cite

Plastic, usually derived from non-renewable sources, is among the most used materials in food packaging. Despite its barrier properties, plastic packaging has a recycling rate below the ideal and its accumulation in the environment leads to environmental issues. One of the solutions approached to minimize this impact is the development of food packaging materials made from polymers from renewable sources that, in addition to being biodegradable, can also be edible. Different biopolymers from agricultural renewable sources such as gelatin, whey protein, starch, chitosan, alginate and pectin, among other, have been analyzed for the development of biodegradable films. Moreover, these films can serve as vehicles for transporting bioactive compounds, extending their applicability as bioactive, edible, compostable and biodegradable films. Biopolymer films incorporated with plant-derived bioactive compounds have become an interesting area of research. The interaction between environment-friendly biopolymers and bioactive compounds improves functionality. In addition to interfering with thermal, mechanical and barrier properties of films, depending on the properties of the bioactive compounds, new characteristics are attributed to films, such as antimicrobial and antioxidant properties, color and innovative flavors. This review compiles information on agro-based biopolymers and plant-derived bioactive compounds used in the production of bioactive films. Particular emphasis has been given to the methods used for incorporating bioactive compounds from plant-derived into films and their influence on the functional properties of biopolymer films. Some limitations to be overcome for future advances are also briefly summarized. This review will benefit future prospects for exploring innovative methods of incorporating plant-derived bioactive compounds into films made from agricultural polymers.

show abstract

Physical properties of starch plasticized by a mixture of plasticizers

Cited by 67 publications

References 25 publications

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

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

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

Methods of Incorporating Plant-Derived Bioactive Compounds into Films Made with Agro-Based Polymers for Application as Food Packaging: A Brief Review

Contact Info

Product

Resources

About