Abstract
A starch-based biodegradable film was prepared in this paper, and the properties of the film were discussed. The film was prepared with polyethylene grafted and blended by epichlorohydrin modified-corn starch, linear low density polyethylene, low density polyethylene and maleic anhydride. Epoxy soybean oil was served as plasticizer and a small amout of ethylene propylene diene monomer was used as compatibilizer. 0.012 mm thickness degradable films were prepared with various blow molding methods. FTIR was used to characterize the modified starch and SEM was used to observe the morphology of the film before and after the modification. The results showed that the film could maintain an excellent performance on mechanical properties and degradation until the content of modified starch increased to 70% and have a good future in agricultural application.
Highlights
In light of the global concern for the accumulation of waste, biodegradable materials were extensively investigated, in order to partially replace petroleum-based plastics (Averous & Boquillon, 2004; Bertuzzi, Armada, & Gottifredi, 2007; Buléon, Véronèse, & Putaux, 2007)
The results showed that the film could maintain an excellent performance on mechanical properties and degradation until the content of modified starch increased to 70% and have a good future in agricultural application
Bands narrowed and the position of -OH band shifted from 3438 cm-1 to 3367 cm-1 because of the cross linked reaction which cause the kinds of -OH bands decreased
Summary
In light of the global concern for the accumulation of waste, biodegradable materials were extensively investigated, in order to partially replace petroleum-based plastics (Averous & Boquillon, 2004; Bertuzzi, Armada, & Gottifredi, 2007; Buléon, Véronèse, & Putaux, 2007). Among the many polymers used to develop biodegradable films, starch has been focus of investigations because it is a natural polymer from renewable resources, abundant and low cost, that is capable of forming continuous thermoplastic materials (Choi & Kerr, 2003; Famá, Bittante, Sobral, Goyanes, & Gerschenson, 2010; Famá, Ganan Rojo, Bernal, & Goyanes, 2012; Farhat, Blanshard, & Mitchell, 2000). Like other hydrocolloids, starch films exhibit several drawbacks when compared to plastic polymers, such as their hydrophilic character and poor mechanical properties, which can be improved by blending with other compounds in the film
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