Nanocomposite Film Containing Fibrous Cellulose Scaffold and Ag/TiO2 Nanoparticles and Its Antibacterial Activity
Nanocomposite Film Containing Fibrous Cellulose Scaffold and Ag/TiO2 Nanoparticles and Its Antibacterial Activity
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DOI：
10.3390/polym10101052
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发表时间：
2018-10-01
期刊：
影响因子：
5
通讯作者：
Hsiao, Benjamin S.
中科院分区：
文献类型：
--
作者：
Li, Yanxiang;Tian, Jessica;Hsiao, Benjamin S.
纤维素是一种广泛应用于日常生活的天然聚合物，但它易受微生物生长的影响。在这项研究中，利用一种简单的溶胶-凝胶技术将纤维素支架与Ag/TiO2纳米颗粒结合。采用扫描电镜（SEM）和x射线衍射（XRD）对制备的Ag/TiO2/纤维素复合膜的形貌和晶体结构进行了表征。在黑暗和紫外线条件下进行了涉及大肠杆菌（E. coli）的抗菌试验，以评估Ag/TiO2/纤维素复合膜与原始纤维素纸和TiO2/纤维素复合膜的效率。结果表明，Ag/TiO2/纤维素复合膜的抑菌活性优于其他所有样品，其中Ag含量为0.030 wt%，对大肠杆菌的抑制率超过99%。本研究表明，分散在纤维素支架中的纳米Ag/TiO2颗粒具有减缓细菌生长的作用，并对其机制进行了讨论。
Cellulose is a natural polymer that is widely used in daily life, but it is susceptible to microorganism growth. In this study, a simple sol-gel technique was utilized to incorporate the cellulose scaffold with Ag/TiO2 nanoparticles. The morphology and crystal structure of the as-prepared Ag/TiO2/cellulose composite film were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD) methods. Antibacterial tests involving the use of Escherichia coli (E. coli) were carried out under dark and UV-light conditions to evaluate the efficiency of the Ag/TiO2/cellulose composite film in comparison with pristine cellulose paper and TiO2/cellulose composite film. The results indicated that the antibacterial activity of the Ag/TiO2/cellulose composite film outperformed all other samples, where the Ag content of 0.030 wt% could inhibit more than 99% of E. coli. This study suggests that finely dispersed nanocale Ag/TiO2 particles in the cellulose scaffold were effective at slowing down bacterial growth, and the mechanisms of this are also discussed.