The addition of sugarcane bagasse and asparagus peel enhances the properties of sweet potato starch foams

Abstract

The agro‐industrial wastes, sugarcane bagasse (SB) and asparagus peel (AP), were used to enhance the properties of biodegradable foam trays based on sweet potato starch‐based foam trays (starch/SB and starch/AP trays, respectively). Starch/SB and starch/AP trays containing different concentrations of SB and AP (0%‐40%, w/w) were prepared, and their microstructure and physical, thermal, and mechanical properties were characterized. The addition of fibers wastes allowed obtaining a yellowish foam tray with lower luminosity and higher porosity, mechanical resistance, deformability, and better ability to absorb water as compared with the sweet potato starch foam trays without fibers. The addition of SB yielded foam trays less porous, with lower water absorption capacity and greater tensile strength than the addition of AP. Higher concentrations of AP fibers (greater than 30%) generate more extendible foam trays. The addition of fibrous wastes improved the thermal stability of the sweet potato starch foam trays. The composite foam trays produced in this work could be used as substitutes for expanded polystyrene in dry food packaging.

A comprehensive review on the properties and functionalities of biodegradable and semibiodegradable food packaging materials

“…According to Cruz‐Tirado et al. (2019) and Macias‐Almazan et al. (2020), cellulose and hemicellulose contents of sugarcane bagasse are 40%–45% and 25%–30%, respectively.…”

“…Being a lignocellulosic source, sugarcane bagasse is composed of considerable amounts of hemicellulose and lignin. According to Cruz-Tirado et al (2019) and Macias-Almazan et al (2020), cellulose and hemicellulose contents of sugarcane bagasse are 40%-45% and 25%-30%, respectively. It also contains approximately 10%-25% of lignin (de Melo Brites et al, 2020).…”

“…Accordingly, sugarcane bagasse was claimed to be an effective fibrous source over asparagus (Asparagus officinalis L.) peel for developing biodegradable sweet potato foam trays (Cruz Tirado et al, 2019). The results revealed that the sugarcane bagasse fiber reinforcement have resulted in the packaging property enhancements.…”

Sustainable Use of Fruit and Vegetable By-Products to Enhance Food Packaging Performance

“…Starch-based foams are known to have poor mechanical properties and hydrophilic characteristics compared to petroleum-based packaging. For these reason, Cruz-Tirado et al [ 44 ] evaluated the use of various concentrations (0–40% of w/w ) of lignocellulosic fibers from sugarcane bagasse (SB, cellulose content 40–50%) and asparagus peel (AP, cellulose content 22%) to improve the mechanical properties of biodegradable trays based on sweet potato starch. The lowest cellulose content of the asparagus fibers gave starch trays greater hygroscopicity than starch/SB trays, which at high concentration (from 20%) exerted a water absorption capacity (<34.4 g of water per 100 g of dry mass) lower than the control (55.4 g of water per 100 g of dry mass).…”

Efecto del secado por túnel, liofilización y atomización sobre la capacidad antioxidante y compuestos fenólicos de huacatay

“…Se registraron las coordenadas de los parámetros luminosidad (L*) de 0 (negro) a 100 (blanco), a* de -a (verde) a +a (rojo), y b* de −b (azul) a +b (amarillo). Con estos datos se calculó la saturación o pureza o croma (C*) y la diferencia global de color (ΔE) utilizando los valores L (89.7), a (1.9) y b (-4.9) de la placa blanca estándar [21]. * = √( * ) 2 + ( * ) 2 (1)…”