Vegetable ivory obtained from the endosperm of jarina seeds (Phytelephas macrocarpa), native to the Amazon region, has been regarded as a sustainable alternative to elephant ivory; however, it is vulnerable to biodegradation due to its mannan polysaccharide composition. In this study, vegetable ivory was coated by atmospheric air plasma jet activation of silicone and copaiba oils. Stable, smooth, and crosslinked micrometric coatings were formed after 80 s of plasma activation. Water contact angle results show that hydrophobicity was enhanced without detrimental effects on the surface reflectance. The best antibacterial performance against Staphylococcus aureus and Escherichia coli was obtained for a 1:1 mixture of both oils due to the synergetic action of silicone hydrophobicity and copaiba bioactivity.

中文翻译：

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通过冷等离子射流活化硅酮和copaiba油获得的植物象牙上的抗菌涂层

从亚马孙地区原产的贾里纳种子（Phytelephas macrocarpa）的胚乳中获得的植物象牙已被视为大象象牙的可持续替代品。然而，由于其甘露聚糖含量高，它很容易被生物降解。在这项研究中，植物象牙被大气中的等离子射流活化的有机硅和copaiba油覆盖。等离子体活化80秒钟后，形成了稳定，光滑和交联的微米级涂层。水接触角结果表明疏水性得到增强，而对表面反射率没有不利影响。对金黄色葡萄球菌和大肠杆菌的最佳抗菌性能 由于硅氧烷疏水性和copaiba生物活性的协同作用，两种油以1：1的比例获得了“油”。