Preparation of hydrophilic PBS-TME/PLA composites and its effect on the growth of Brassica napus

Abstract

Abstract Hydrophilic modified PBS-TME was obtained by introducing trimethylol ethane into the molecular chain of polybutylene succinate (PBS) through copolymerization reaction, and PBS-TME was blended with PLA in different ratios to prepare PBS-TME/PLA series of composites, and various performance tests were carried out on them.The results show that the system is more stable when the ratio of PBS-TME/PLA composites is 8:2, and there exists a strong intermolecular hydrogen bonding force between PBS-TME as matrix and PLA, with lower total bonding energy and total energy, and the composite system is more stable, which makes the intermolecular compatibility good.The thermodynamic and combined mechanical properties were optimal, with a tensile strength of 15.78 MPa and an elongation at break of 19.56%. The hydrophilicity was enhanced with a water contact angle of 72.6° and a water vapor transmission rate of 63.12 [g·(m2·d)−1] at the maximum value.The rate of biodegradation was increased by degradation of 37.33% after 6 months in soil supernatant and 27.85% after 42 days of enzymatic degradation. The chlorophyll content, soluble protein content, peroxidase activity and vitamin C content in the leaves of bok choy were higher than the standards required by the food industry.