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Environmental degradation and durability of bulk 3D-printed parts from biodegradable polyester blends of PBS, PLA, and PHB in seawater
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Researchers examined how print orientation and polymer composition affect the durability of 3D-printed biodegradable polyester blends (PBS, PLA, and PHB) in artificial seawater, finding that both factors critically influence water uptake, mechanical strength, and crystallinity, with important implications for designing marine-safe biodegradable materials.
This study examines behavior of 3D-printed biodegradable polyester blends in artificial seawater, revealing that print orientation and polymer composition critically affect water uptake, mechanical strength, and crystallinity.
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Biodegradation behavior of polyesters with various internal chemical structures and external environmental factors in real seawater
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Researchers tested how different types of biodegradable polyester plastics break down in real ocean conditions off the coast of South Korea. They found that the chemical structure of each polyester, particularly its crystallinity and glass transition temperature, significantly influenced how quickly it degraded. The study provides practical guidance for designing biodegradable plastics that will actually break down effectively in marine environments.
Bioplastics in the Sea: Rapid In-Vitro Evaluation of Degradability and Persistence at Natural Temperatures
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Researchers evaluated the marine degradability of multiple bioplastic materials at natural seawater temperatures, finding that most bioplastics persist in ocean environments rather than degrading quickly, challenging assumptions that bioplastics represent a straightforward solution to marine plastic pollution.
Investigation of the Hydrolytic Degradation Kinetics of 3D-Printed PLA Structures under a Thermally Accelerated Regime
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Researchers investigated the hydrolytic degradation kinetics of 3D-printed PLA structures under thermally accelerated conditions, finding that print orientation and layer thickness influence degradation rate and that PLA retains structural integrity longer than expected under moderate temperature and humidity.
Generation of Microplastics from Biodegradable Packaging Films Based on PLA, PBS and Their Blend in Freshwater and Seawater
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Researchers studied how biodegradable plastic films made from PLA, PBS, and their blends break down in freshwater and seawater over several months. All films generated microplastic particles as they degraded, with different water environments producing different amounts and types of fragments. This study challenges the idea that biodegradable plastics are a clean solution, since they still create microplastics during breakdown in natural water systems.
Microbial Degradation Behavior in Seawater of Polyester Blends Containing Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx)
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Researchers tested the marine biodegradability of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and its blends with PBAT, PBS, and PLA using a biochemical oxygen demand method in seawater, finding that PHBHHx alone degraded efficiently and that blend degradation rates decreased proportionally with lower PHBHHx content. Surface morphology of the blend sheets was identified as a key factor controlling overall biodegradation rates.
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