Sericin cocoon bio-compatibilizer for reactive blending of thermoplastic cassava starch

Abstract

Cassava starch was blended with glycerol to prepare thermoplastic starch (TPS). Thermoplastic starch was premixed with sericin (TPSS) by solution mixing and then melt-blended with polyethylene grafted maleic anhydride (PEMAH). The effect of sericin on the mechanical properties, morphology, thermal properties, rheology, and reaction mechanism was investigated. The tensile strength and elongation at break of the TPSS10/PEMAH blend were improved to 12.2 MPa and 100.4%, respectively. The TPS/PEMAH morphology presented polyethylene grafted maleic anhydride particles (2 μm) dispersed in the thermoplastic starch matrix, which decreased in size to approximately 200 nm when 5% sericin was used. The melting temperature of polyethylene grafted maleic anhydride (121 °C) decreased to 111 °C because of the small crystal size of the polyethylene grafted maleic anhydride phase. The viscosity of TPS/PEMAH increased with increasing sericin content because of the chain extension. Fourier-transform infrared spectroscopy confirmed the reaction between the amino groups of sericin and the maleic anhydride groups of polyethylene grafted maleic anhydride. This reaction reduced the interfacial tension between thermoplastic starch and polyethylene grafted maleic anhydride, which improved the compatibility, mechanical properties, and morphology of the blend.

Effect of Egg-Coating Material Properties by Blending Cassava Starch with Methyl Celluloses and Waxes on Egg Quality

“…The coating biomaterials used in the egg-production industry may be lipid-, protein-, or polysaccharide-based. Biomaterials with properties amenable to egg-coating include starch [4][5][6], carboxymethyl cellulose (CMC) [7][8][9], carboxymethyl chitosan [10], carboxymethyl bacterial cellulose [11], sericin [12,13], keratin [14], fibroin [15], and pectin [16][17][18][19].…”

Modified Poly(Lactic Acid) Epoxy Resin Using Chitosan for Reactive Blending with Epoxidized Natural Rubber: Analysis of Annealing Time

“…This lack of degradation affects organisms living on land and in the sea. Biodegradable polymers, such as polybutylene succinate (PBS) [ 1 ], polylactic acid (PLA) [ 2 ], polysaccharides [ 3 ], carboxymethyl cellulose [ 4 , 5 , 6 ], carboxymethyl bacterial cellulose [ 7 ], CTS [ 8 ], carboxymethyl chitosan [ 9 ], starch [ 10 , 11 , 12 ], thermoplastic starch (TPS) [ 13 , 14 , 15 ], keratin [ 16 ], and pectin [ 17 , 18 ], have been widely studied. PLA is a biodegradable aliphatic polyester.…”

Native and modified biodegradable starch‐based packaging for shelf‐life extension and safety of fruits/vegetables

“…Nanoparticles like nanoclay, nanosilicon dioxide or polysaccharide‐based crystals can be used to enhance the mechanical properties of starch films (Ali et al ., 2019). Moreover, combining different polymers with starch as a raw material may enhance the mechanical and barrier qualities of packaging material (Chaiyaso et al ., 2021). Starch films may benefit from adding essential oils to their anti‐bacterial protection (Issa et al ., 2017).…”