Abstract

The common approach to creating antimicrobial polymer materials is the distribution of a bactericidal additive in a material by mixing the additive with a solution or a melt of the polymer. This work proposes the method introducing of copper(II) sulfate, which has antimicrobial properties, into a poly(lactic acid) film by forced impregnation of a salt solution via the crazing mechanism. CuSO₄ has been found to be uniformly distributed in the bulk of the polymer in the form of particles with sizes of about 100 nm. In the course of the structural modification, the surface of the polymer film becomes rougher and more hydrophobic. The water contact angle increases from 40° to 60°–65°. The incorporation of CuSO₄ does not affect the surface properties but has a reinforcing effect on the polymer matrix as is evident from tensile tests (strength and elongation at break increase by 2.5 and 1.4 times, respectively).

中文翻译：

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银纹法浸渍聚乳酸和硫酸铜材料的研制

摘要

制造抗菌聚合物材料的常见方法是通过将杀菌添加剂与聚合物的溶液或熔体混合来将杀菌添加剂分布在材料中。这项工作提出了通过微裂纹机制，通过盐溶液的强制浸渍，将具有抗菌特性的硫酸铜(II)引入到聚乳酸薄膜中的方法。已发现CuSO ₄以尺寸为约100nm的颗粒形式均匀分布在聚合物本体中。在结构改性的过程中，聚合物薄膜的表面变得更加粗糙并且更加疏水。水接触角从40°增加到60°–65°。_{CuSO 4}的掺入不会影响表面性能，但对聚合物基体具有增强作用，这一点从拉伸试验中可以明显看出（强度和断裂伸长率分别增加2.5倍和1.4倍）。