CaCO3-coated PVA/BC-based composite for the simultaneous adsorption of Cu(II), Cd(II), Pb(II) in aqueous solution
CaCO3-coated PVA/BC-based composite for the simultaneous adsorption of Cu(II), Cd(II), Pb(II) in aqueous solution
复制标题
CaCO3 涂层 PVA/BC 复合材料用于同时吸附水溶液中的 Cu(II)、Cd(II)、Pb(II)
DOI：
10.1016/j.carbpol.2021.118227
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发表时间：
2021
影响因子：
11.2
通讯作者：
Xue Juanqin
中科院分区：
文献类型：
--
作者：
Zhang Yu;Zhang Liang;Gao Ruohui;Zhong Lvling;Xue Juanqin
开放性伤口的细菌感染一直威胁着人类的健康。在此，我们利用生物自生成和原位还原制备了银（Ag）-聚多巴胺（PDA）/细菌纤维素（BC）-壳聚糖（CTS）薄膜。将CTS添加到培养基中以使BC在成膜过程中与CTS交织在一起。硝酸银在紫外线照射下原位还原为Ag纳米粒子，并在PDA的帮助下将纳米粒子很好地分散在BC-CTS薄膜中，与CTS协同作用。 Ag-PDA/BC-CTS薄膜富含官能团，具有良好的拉伸和溶胀性能。该抑菌膜对革兰氏阳性菌和革兰氏阴性菌均表现出广谱抑制作用，连续使用48小时后抑制率仍保持在80%以上。使用NIH3T3成纤维细胞验证了薄膜良好的生物相容性。结果表明Ag-PDA/BC-CTS膜抑制有害细菌的生长，而对健康细胞影响很小。
Bacterial infections on open wounds have always been a threat to human health. Herein, we prepared a silver (Ag)-polydopamine (PDA)/bacterial cellulose (BC)-chitosan (CTS) film using biological self-generation and in situ reduction. CTS was added to culture medium to allow BC to intertwine with CTS during film formation. Silver nitrate was reduced in situ to Ag nanoparticles under ultraviolet irradiation, and the nanoparticles were well dispersed in the BC-CTS film with the help of PDA, which worked synergistically with the CTS. The Ag-PDA/ BC-CTS film was enriched in functional groups, and it had good tensile and swelling properties. The inhibition film demonstrated broad-spectrum inhibition of Gram-positive and Gram-negative bacteria, and this inhibition was maintained at more than 80% after 48 h of continuous use. The good biocompatibility of the film was verified using NIH3T3 fibroblasts. The results suggested that the Ag-PDA/BC-CTS film inhibited the growth of harmful bacteria while having little effect on healthy cells.