title: Accelerated Biodegradation of Agriculture Film Based on Aromatic-Aliphatic Copolyester in Soil under Mesophilic Conditions.
abstract: A study was conducted on the biodegradation of aromatic-aliphatic copolyester-based agricultural film in soil at 25 °C. The polymer is known to be biodegradable under composting conditions although rather recalcitrant under mesophilic conditions. The material investigated comprised of the copolyester filled with approximately 25% of starch containing biodegradable plasticizers, and its behavior was compared to the corresponding material without the filler. Mineralization followed by CO2 production merely reached the point of about 6% after 100 days of incubation in the pure copolyester film, whereas the value of around 53% was recorded for the filled copolyester film, which exceeded the readily biodegradable starch filler content in the material by more than 20% and could be accounted for biodegradation of the copolyester. It was suggested that the accelerated copolyester biodegradation in the starch-filled material was most likely explained by the increase in the active surface area of the material available for the microbial attack after biodegradation of the filler. The results were supported by changes in molecular weight distributions of the copolyester and observations made by several microscopic techniques. These findings encourage further development of biodegradable agricultural films based on this material.
authors.forename: Jana
authors.initials: J
authors.lastname: Šerá
authors.forename: Petr
authors.initials: P
authors.lastname: Stloukal
authors.forename: Petra
authors.initials: P
authors.lastname: Jančová
authors.affiliation: Institut de Chimie de Clermont-Ferrand (ICCF), UMR 6296, Blaise Pascal University , 63177 Aubière, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Verney
authors.forename: Silvie
authors.initials: S
authors.lastname: Pekařová
authors.forename: Marek
authors.initials: M
authors.lastname: Koutný
mesh_terms: D001673:Biodegradation, Environmental; D010968:Plasticizers / Q000737:chemistry; D011091:Polyesters / Q000737:chemistry*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry*; D013213:Starch / Q000737:chemistry
chemical_list: D010968:Plasticizers; D011091:Polyesters; D012987:Soil; D012989:Soil Pollutants; D013213:Starch
keywords: aromatic−aliphatic copolyester; biodegradation; mesophilic conditions; soil; starch