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Outline
Zinc metal has shown considerable potential for cardiovascular and orthopedic applications due to its excellent biocompatibility and suitable biodegradation properties. However， the high initial release of Zn2+ triggers a severe immune response which leads to cytotoxicity， limiting its further clinical applications. In this paper， epigallocatechin gallate/metal ion （EGCG/Zn， EGCG/Mg， EGCG/Ca） based coatings are developed on pure zinc surfaces and the coating structure， degradation properties， antimicrobial properties and biocompatibility are investigated. The results show that the three coatings have good binding ability. Among them， EGCG/Mg provides optimal corrosion resistance and significantly reduces the degradation rate of the samples， while EGCG/Ca effectively promotes the formation of hydroxyapatite with optimal mineralization ability， and the EGCG coatings effectively inhibit the initial large release of Zn2+ and exhibit superior antimicrobial properties and good biocompatibility. This study further provides new ideas for the development of novel green chemical conversion coatings for zinc and zinc alloys.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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