Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 38, Pages 32688-32697Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b11299
Keywords
metal-organic framework; carbon nitrides; polylactic acid; fire safety; mechanical performance
Funding
- National Key Research and Development Program of China [2017YFC0805904]
- National Natural Science Foundation of China [51603200]
- Fundamental Research Funds for the Central Universities [WK2320000037]
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A covalent oxygen-rich C2N (CNO) network derived from metal-organic framework (HKUST-1) was innovatively synthesized by a rapid and green microwave irradiation method. This method can produce CNO multilayers efficiently, which paves a way for practical application of the nanosheets. Structural characterization and synthesis processes of CNO nanosheets were investigated to further understand the key role of HKUST-1. The as-prepared CNO has a layered feature, which theoretically favors to improve flame retardancy and mechanical performance of polymers. Desirable results were obtained as expected: the fire safety, antitensile, and impact resistance of polylactic acid (PLA) were prominently enhanced after adding CNO nanosheets, which can be attributed to the excellent dispersion and compatibility. PLA/CNO nanocomposite was self-distinguished at 2 wt % content of CNO, whereas the tensile strength was increased more than 36% compared with that of pure PLA, as well as the impact strength. This work broadens the application fields of CNO and endows it a possibility of actual application.
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