Lei Jia, Zhou Lei, Tang Yongjian, Luo Yong, Duan Tao, Zhu Wenkun
Sichuan Civil-Military Integration Institute, Mianyang 621010, China.
Sichuan Biotech Force Technology Co., Ltd, Mianyang 621010, China.
Materials (Basel). 2017 May 12;10(5):524. doi: 10.3390/ma10050524.
Robust, high-strength and environmentally friendly antibacterial composite films were prepared by simply blending konjac glucomannan (KGM) and silver nanowires (Ag NWs) in an aqueous system. The samples were then characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), thermal gravimetric analysis, mechanical property tests, Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS) and antimicrobial tests. The results showed that there was a high ratio of Ag NWs uniformly distributed in the composite films, which was vital for mechanical reinforcement and stable antibacterial properties. The enhanced thermal stability and mechanical intensity increased, while the elongation at break was reduced with an increase in the amount of Ag NWs found in the composite films. When the percentage of Ag NWs in the composite films reached 5%, the tensile strength was 148.21 MPa, Young's modulus was 13.79 GPa and the ultimate strain was 25.28%. Antibacterial tests showed that the KGM films had no antibacterial effect. After the addition of Ag NWs, the composite films had an obvious inhibitory effect on bacteria, with the uniform dispersion of Ag NWs promoting the antibacterial effect to a certain degree. These results indicated that these composite films would have a potential application in the fields of environmentally friendly packaging or medicine.
通过在水体系中简单地将魔芋葡甘聚糖（KGM）和银纳米线（Ag NWs）混合，制备出了坚固、高强度且环保的抗菌复合薄膜。然后使用扫描电子显微镜（SEM）、X射线衍射（XRD）、热重分析、力学性能测试、傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）和抗菌测试对样品进行了表征。结果表明，在复合薄膜中存在高比例均匀分布的Ag NWs，这对于机械增强和稳定的抗菌性能至关重要。随着复合薄膜中Ag NWs含量的增加，热稳定性和机械强度增强，而断裂伸长率降低。当复合薄膜中Ag NWs的百分比达到5%时，拉伸强度为148.21 MPa，杨氏模量为13.79 GPa，极限应变为25.28%。抗菌测试表明，KGM薄膜没有抗菌效果。添加Ag NWs后，复合薄膜对细菌有明显的抑制作用，Ag NWs的均匀分散在一定程度上促进了抗菌效果。这些结果表明，这些复合薄膜在环保包装或医学领域具有潜在的应用价值。
