Jardón-Maximino Noemi, Cadenas-Pliego Gregorio, Ávila-Orta Carlos A, Comparán-Padilla Víctor Eduardo, Lugo-Uribe Luis E, Pérez-Alvarez Marissa, Tavizón Salvador Fernández, Santillán Gerardo de Jesús Sosa
Centro de Investigación en Química Aplicada (CIQA), Saltillo, Coahuila 25294, Mexico.
Centro de Tecnología Avanzada CIATEQ, Lerma, Estado de México 542004, Mexico.
Polymers (Basel). 2021 May 22;13(11):1694. doi: 10.3390/polym13111694.
Copper nanoparticles (CuNPs) functionalized with polyethyleneimine (PEI) and 4-aminobutyric acid (GABA) were used to obtain composites with isotactic polypropylene (iPP). The iPP/CuNPs composites were prepared at copper concentrations of 0.25-5.0 wt % by melt mixing, no evidence of oxidation of the CuNP was observed. Furthermore, the release of copper ions from iPP/CuNPs composites in an aqueous medium was studied. The release of cupric ions was higher in the composites with 2.5 and 5.0 wt %. These composites showed excellent antibacterial activity (AA) toward () and (). The incorporation of CuNP into the iPP polymeric matrix slightly decreased the thermal stability of the composite material but improved the crystallinity and the storage modulus. This evidence suggests that CuNPs could work as nucleating agents in the iPP crystallization process. The iPP/CuNPs composites presented better AA properties compared to similar composites reported previously. This behavior indicates that the new materials have great potential to be used in various applications that can be explored in the future.
用聚乙烯亚胺（PEI）和4-氨基丁酸（GABA）功能化的铜纳米颗粒（CuNP）与等规聚丙烯（iPP）制备复合材料。通过熔融共混在铜浓度为0.25 - 5.0 wt%的条件下制备iPP/CuNP复合材料，未观察到CuNP氧化的迹象。此外，研究了iPP/CuNP复合材料在水介质中铜离子的释放情况。在含2.5 wt%和5.0 wt%铜的复合材料中铜离子的释放量更高。这些复合材料对（）和（）表现出优异的抗菌活性（AA）。将CuNP掺入iPP聚合物基体中会略微降低复合材料的热稳定性，但提高了结晶度和储能模量。这表明CuNP在iPP结晶过程中可作为成核剂。与先前报道的类似复合材料相比，iPP/CuNP复合材料具有更好的AA性能。这种行为表明这些新材料在未来可探索的各种应用中具有巨大的潜力。
