Journal
ACS NANO
Volume 15, Issue 10, Pages 16478-16487Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c05952
Keywords
bioinspired fiber; fishnet-like; supertough; organic-inorganic; green and scalable
Categories
Funding
- National Natural Science Foundation of China [52073151]
- Natural Science Foundation of Shandong Province [ZR2020ME048]
- State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) [GZRC202010]
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Researchers have successfully fabricated a bioinspired fiber with high strength and super toughness using molecular and nanoscale engineering, providing a strategy for industrially manufacturing spider fiber-like artificial fibers with super toughness.
Green and scalable production of some fibrous materials with higher fracture energy has long been the goal of researchers. Although some progress has been made in recent years in the research of materials with high fracture energy, inspired by the fiber structure of spider silk, it is still a great challenge to produce artificial fibers with extremely high toughness using a simple and green process. Here, we use the molecular and nanoscale engineering of calcium phosphate oligomers (CaP, < 1 nm) and waterborne polyurethanes (WPU) macromolecules that have strong interactions to form organic-inorganic networks just like beta-sheet crystalline and flexible amorphous regions in spider silk. Through a simple and green route based on widespread paper string processing techniques, we fabricate a strong and supertough bioinspired fiber with a high strength (442 MPa), which is 7-15 times higher than the strength of counterpart PU (20-30 MPa), and a super toughness (640 MJ m(-3)), which is 2-3.5 times higher than the toughness of spider dragline silk. This technique provides a strategy for industrially manufacturing spider fiber-like artificial fibers with a super toughness.
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