| Autor: |
MAO Long, LIU Xiao-chao, XIE Bin, WU Hui-qing, LIU Yue-jun |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Cailiao gongcheng, Vol 49, Iss 2, Pp 127-135 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1001-4381 |
| DOI: |
10.11868/j.issn.1001-4381.2019.000750 |
| Popis: |
Based on the excellent chelating ability of phytic acid (PA), Ag+, Cu2+, Fe3+, and Zn2+, were used to chelate with PA, and deposited on the surface of layered double hydroxides (LDHs) to form core-shell structure, so as to improve the interfacial compatibility between layered clay and polymer matrix. Surface coated LDHs (LDHs@PA-M) loaded with different metal ions were prepared. The micromorphology of LDHs@PA-M loaded with different metal ions was studied and applied in the strengthening modification of poly(ε-caprolactone) (PCL). The results show that PA can form stable and uniform nano-coatings with Ag+ and Cu2+on the surface of LDHs. With the excellent antibacterial activity of Ag+ and Cu2+, the antibacterial rates of LDHs@PA-Ag+ and LDHs@PA-Cu2+ against Escherichia coli (E.coli) both exceed 99.99%. Compared with pure PCL, the tensile strength and elongation at break of LDHs@PA-Cu2+/PCL nanocomposites (mass fraction of LDHs@PA-Cu2+ is 1%) increase by 30.7% and 33.3%, reaching 40.9 MPa and 816%, respectively. The enhancement of mechanical properties for LDHs@PA-Cu2+/PCL nanocomposites is the most remarkable. The antibacterial rate of LDHs@PA-Cu2+/PCL and LDHs@PA-Ag+/PCL nanocom-posites against E.coli both exceed 99.99%. It shows excellent antibacterial activity, which expands the application of layered clay/bio-based polymer nanocomposites in the field of active packaging. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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