Abstract
Nowadays, starch is an excellent biodegradable option instead of synthetic polymers, to avoid contamination. In this work, triticale starch from three varieties (Faraón, Peteroa and Aguacero) was isolated and the physico-chemical and thermo-rheological properties were evaluated. Also, mechanical properties of thermoplastic films using this starch were assessed. From the physico-chemical analysis it was found that the moisture, protein and lipids contents were slightly different among starches. Amylose value was similar. Thermo-rheological behavior measured by Mixolab® revealed that initial water uptake was higher for Faraón variety due to the grain morphology observed by Scanning Electron Microscopy (SEM). Values for gelatinization temperature obtained were 82.2 °C for Faraón starch, followed by Peteroa (72.0 °C) and finally Aguacero (65.6 °C). From the mechanical properties, Faraón thermoplastic starch (TPS) films showed the highest value of Young’s modulus (1.90 ± 1.09 MPa) for the composition 50/25/25 (starch/glycerol/water). The highest elongation at break (64.77 ± 14.14 %) was obtained for Peteroa composition 50/35/15 (starch/glycerol/water). Then, triticale mainly used to feed animals more than for human consumption, could be good alternative for preparing biodegradable films with potential applications in agriculture and food packaging.
Highlights
IntroductionAn effort has been made to use biodegradable polymers for natural sources. Natural biopolymers come from four main sources: animal, seafood, agricultural and microbial [1].Starch, is a polysaccharide that has been used as a raw material for production of biomaterials for applications in agriculture and food because of its low cost, availability, good tensile strength, and it is derived from a renewable resource [2].Triticale (X triticosecale Wittmack) is a cereal grain of selfing, obtained artificially by humans from crossing wheat with rye
Nowadays, an effort has been made to use biodegradable polymers for natural sources
A complete physico-chemical and thermo-rheological characterization of three varieties of triticale starch was achieved by using chemical analysis and Mixolab®
Summary
An effort has been made to use biodegradable polymers for natural sources. Natural biopolymers come from four main sources: animal, seafood, agricultural and microbial [1].Starch, is a polysaccharide that has been used as a raw material for production of biomaterials for applications in agriculture and food because of its low cost, availability, good tensile strength, and it is derived from a renewable resource [2].Triticale (X triticosecale Wittmack) is a cereal grain of selfing, obtained artificially by humans from crossing wheat with rye. Natural biopolymers come from four main sources: animal, seafood, agricultural and microbial [1]. Its name is a combination of prefix Tritico (derived from Triticum) and the suffix Secale, the genera of the botanical parent plants. This is a cereal that adapts to any climate even more than wheat. It has a high starch content between 57 % and 65 %, which gives it great potential for applications as forage and as a biomaterial [3,4,5]
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