期刊
SCIENCE ADVANCES
卷 8, 期 22, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abn6006
关键词
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资金
- Laboratory Directed Research and Development Program of Oak Ridge National Laboratory
- U.S. DOE, Office of Science, Materials Sciences, and Engineering Division
This study introduces a circular model of plastic manufacturing by upcycling common plastic ABS into recyclable and robust ABS-vitrimer using accessible and scalable fused filament fabrication technique. The successful development of fully processable ABS-vitrimer overcomes the challenge of reprinting cross-linked materials and enables the direct printing of stronger, tougher, and solvent-resistant 3D objects from unsorted plastic waste.
A sustainable closed-loop manufacturing would become reality if commodity plastics can be upcycled into higher-performance materials with facile processability. Such circularity will be realized when the upcycled plastics can be (re)processed into custom-designed structures through energy/resource-efficient additive manufacturing methods, especially by approachable and scalable fused filament fabrication (FFF). Here, we introduce a circular model epitomized by upcycling a prominent thermoplastic, acrylonitrile butadiene styrene (ABS) into a recyclable, robust adaptive dynamic covalent network (ABS-vitrimer) (re)printable via FFF. The full FFF processing of ABS-vitrimer overcomes the major challenge of (re)printing cross-linked materials and produces stronger, tougher, solvent-resistant three-dimensional objects directly reprintable and separable from unsorted plastic waste. This study thus offers an imminently adoptable approach for advanced manufacturing toward the circular plastics economy.
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