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首页> 外文期刊>Environmental engineering and management journal >MICROBIAL SAFETY OF PLASTIC MATERIALS OBTAINED FROM WASTES
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MICROBIAL SAFETY OF PLASTIC MATERIALS OBTAINED FROM WASTES

机译：废物中所含塑料的微生物安全性

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Extensive use of plastics leads to the increase of non biodegradable wastes that have to be recycled due to both dramatically decrease of natural resources to producing them and to their increasing need as well as due to environmental issues. Most of goods made by materials based on wastes have to be commonly used by people. Antibacterial character of those is necessary to avoid epidemics. This paper deals with determination of antimicrobial character of materials based on polymeric wastes in comparison with virgin polyolefins. Surface contamination, total number of germs, E. coli and Enterococci growth on the samples surface have been determined and correlated with the surface characteristics of materials (hydrophobicity, surface energy, polarity, charge, roughness) as well as with bulk characteristics such as Young Modulus, crystallinity, water sorption. The conclusion of this study is that materials based on wastes are more sanitary safe by comparing to virgin polymers obtained without antimicrobial additives. This is due to possible maintaining in wastes of active antibacterial additives used in the plastic goods processing. High crystallinity and low water sorption avoid their release. Surface conformation seems to not fit to bacteria shape and dimensions, hindering their adhesion and growth. Negatively charged surface repels negative bacteria. Lower surface hydrophily of wastes, coming from OH and CO groups' elimination, due to photo-degradation during their life cycle, determines lower adhesion of more hydrophilic bacteria such as E. coli.
机译：大量使用塑料会导致不可回收的废物数量增加，这是由于自然资源的大量减少及其生产需求的增加以及环境问题造成的，这些废物必须回收利用。由大多数基于废物的材料制成的商品必须是人们常用的。这些细菌的抗菌特性对于避免流行是必不可少的。与原始聚烯烃相比，本文旨在确定基于聚合物废物的材料的抗菌特性。已经确定了表面污染，细菌总数，大肠杆菌和肠球菌在样品表面上的生长，并与材料的表面特征（疏水性，表面能，极性，电荷，粗糙度）以及整体特征（例如年轻）相关联模量，结晶度，吸水率。这项研究的结论是，与不含抗微生物添加剂的原始聚合物相比，基于废物的材料更卫生。这是由于可能保持在塑料制品加工中使用的活性抗菌添加剂的废物。高结晶度和低吸水率避免了它们的释放。表面构象似乎不适合细菌的形状和尺寸，从而阻碍了细菌的附着和生长。带负电的表面可排斥阴性细菌。由于OH和CO基团在其生命周期中的光降解作用而被消除，从而降低了废物的表面疏水性，从而决定了亲水性更高的细菌（如大肠杆菌）的附着力较低。

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