Physico-mechanical and antibacterial properties of carboxymethyl cellulose (CMC)-based films incorporating Cloisite 30B (C30B) and montmorillonite (MMT) clay nanoparticles (NPs) modified with Ag and Cu ions were investigated. X-Ray diffraction patterns for modified clays with Ag and Cu ions showed that they were effectively located in the interlayer space of C30B and MMT clay NPs and increased their interlayer spacing. Scanning electron microscopy showed a smooth and homogeneous structure for a pure CMC film. Films containing MMT had coarser and more heterogeneous surface compared to C30B film, suggesting a better dispersion of modified C30B in the matrix of CMC. Mechanical analysis showed that films containing Ag- or Cu-modified C30B NPs exhibited higher tensile strength than that of MMT films. The ultraviolet spectroscopy showed that nanocomposite films containing Ag modified C30B had the highest UV absorption compared to other samples. Water vapor permeability of CMC films loaded by Ag- or Cu-modified C30B and MMT NPs significantly decreased compared to those of non-modified types and control. Microbial tests revealed that Ag-modified clay NPs had significantly higher antibacterial activity than Cu-modified types against E. coli and S. aureus bacteria. Films loaded with non-modified C30B NPs had the second most antibacterial effect followed by non-modified MMT NPs and control films.

研究了结合有Cloisite 30B（C30B）和蒙脱石（MMT）的Ag和Cu离子的粘土纳米粒子（羧甲基纤维素）的羧甲基纤维素（CMC）基薄膜的物理机械和抗菌性能。含Ag和Cu离子的改性粘土的X射线衍射图表明，它们有效地位于C30B和MMT粘土NPs的层间空间中，并增加了它们的层间间距。扫描电子显微镜显示出纯CMC膜的光滑且均匀的结构。与C30B薄膜相比，含MMT的薄膜具有更粗糙，更不均匀的表面，表明改性C30B在CMC基质中的分散性更好。力学分析表明，含Ag或Cu修饰的C30B NP的薄膜比MMT薄膜具有更高的拉伸强度。紫外线光谱表明，与其他样品相比，含Ag改性C30B的纳米复合膜具有最高的紫外线吸收率。与未修饰类型和对照相比，由Ag或Cu修饰的C30B和MMT NP加载的CMC膜的水蒸气透过率显着降低。微生物测试表明，Ag改性粘土NPs的抗菌活性明显高于Cu改性粘土。大肠杆菌和金黄色葡萄球菌。装有未修饰的C30B NP的薄膜具有第二大的抗菌作用，其次是未修饰的MMT NP和对照薄膜。