Polylactide/poly(butylene adipate‐co‐terephthalate)/rare earth complexes as biodegradable light conversion agricultural films

Abstract

Rare earth europium(III) complex with α‐thenoyltrifluoroacetone and triphenylphosphine oxide (Eu (TTA)3(TPPO)2, shortened as EuTT) was synthesized in this paper, then blended with polylactide (PLA) and poly(butylene adipate‐co‐terephthalate) (PBAT) to prepare the biodegradable agricultural films. Through the optical performance, mechanical properties, and other research, the results showed that the rare earth complex could convert the sun's ultraviolet light to red light when doped polymer. Moreover, the relative intensity ratio of 5D0/7F2 to 5D0/7F1 of PLA/PBAT/EuTT film could reach 3.79, which implied that the film had strong fluorescence intensity and high color purity. The highest tensile strength of the film could reach 36.7/25.2 MPa, and the elongation at break was 462.8/483.0% in the machine and in the transverse direction when the added amount of Eu (TTA)3(TPPO)2 was 0.1 wt%. The tensile strength of the film was 33.3/20.1 MPa, and the elongation at break could reach 535.8/413.6% when the added amount of Eu (TTA)3(TPPO)2 was increased up to 0.3 wt%. Gel permeation chromatography showed that the Eu (TTA)3(TPPO)2 could cause depolymerization of polylactide, resulting in a decrease in the molecular weight of PLA. Furthermore, the crystallization ability of PLA was also improved. In this paper, the biodegradable films exhibited excellent ultraviolet light conversion ability and mechanical properties.

Selective Degradation of End‐of‐Life Poly(lactide) via Alkali‐Metal‐Halide Catalysis

“…Poly(lactide) (PLA) is manufactured in an annual scale of ≈0.2 million tons and has interesting plastic abilities, which enables utilization in a wide range (e.g., food packaging, pharmaceuticals). In contradiction to the majority of fossil‐based plastics, poly(lactide) is to some extent biodegradable depending on the conditions and environment and is degraded to, for instance, CO 2 ; therefore, environmental issues are reduced if PLA is not treated within the current waste management . Nonetheless, the breakdown of PLA in composting plants is regularly not fully accomplishable in the scheduled time frame.…”

Ethyl Cellulose/Rare Earth Complexes Light‐Conversion Films and Exploration in Acid Rain Detection

“…[16] Nie et al [17] prepared EVA film doped with b-diketones macromolecular lanthanide complexes, but did not consider the degradability of EVA matrix. Wang et al [18] synthesized polylactide/poly(butylene adipate-coterephthalate)/rare earth complexes as biodegradable light conversion agricultural films. Jiang et al [19] researched the light conversion film based on polylactic acid.…”

One-Step Synthesis of Eu3+-Modified Cellulose Acetate Film and Light Conversion Mechanism

“…Yu [ 7 ] et al researched and synthesized a polylactic acid/polybutylene terephthalate/rare earth complex biodegradable light conversion agricultural film. Wang et al [ 8 ] synthesized a rare earth europium (III) complex with α-thenoyltrifluoroacetone and triphenylphosphine oxide (Eu(TTA) 3 (TPPO) 2 ) and then blended this product with polylactide (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) to prepare a biodegradable and efficient blue-violet light conversion agricultural film. They further explored this for environmental pollution.…”