Structural, thermal, and antibacterial properties of chitosan/ZnO composites
Structural, thermal, and antibacterial properties of chitosan/ZnO composites
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DOI：
10.1002/pc.22636
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发表时间：
2014
影响因子：
5.2
通讯作者：
M. Shafiq;T. Yasin;M. Rafiq;Shaista
中科院分区：
文献类型：
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作者：
M. Shafiq;T. Yasin;M. Rafiq;Shaista
研究了氧化锌对壳聚糖结构、热性能和抗菌性能的影响。采用溶胶-浇铸转化法制备了不同浓度的氧化锌(与壳聚糖的质量比为0.5~2)的壳聚糖复合材料。傅立叶变换红外光谱和X射线衍射图表明，壳聚糖与复合材料中的氧化锌之间存在化学作用，且随着填料浓度的增加，相互作用更加明显。与壳聚糖相比，复合材料具有更低的降解速率和更高的热稳定性。以质量损失50%为对比，壳聚糖/氧化锌(1：2)复合材料的热稳定性比壳聚糖高143℃。同样，该复合材料对革兰氏阳性菌和革兰氏阴性菌均表现出一定的杀菌活性。壳聚糖/氧化锌(1：1)复合材料具有较高的杀菌活性。电流-电压特性曲线也显示在等摩尔浓度下，壳聚糖和氧化锌的电流值随电压的增大而显著增加。由此可见，壳聚糖/氧化锌复合水凝胶具有良好的生物相容性、环保性和低成本，可应用于食品包装和生物医学领域。波兰姆。组合，35：79-85,2014。©2013塑料工程师学会
This study presents the influence of zinc oxide (ZnO) on the structural, thermal, and antibacterial characteristics of chitosan. The chitosan composites containing different concentrations of ZnO (0.5–2 mass ratio with respect to chitosan) were prepared using sol-cast transformation method. Fourier-transform infrared spectra and X-ray diffraction patterns revealed chemical interactions between the chitosan and ZnO in the composites that became more evident at higher concentrations of filler. The composites exhibited significantly lower degradation rate and higher thermal stability than that of chitosan. When 50% mass loss is set as a point of comparison, the chitosan/ZnO (1:2) composite exhibited 143°C higher thermal stability compared with chitosan. Similarly, the composites exhibited biocidal activity to gram positive and gram negative bacteria. Furthermore, higher biocidal activity was possessed by chitosan/ZnO (1:1) composites. The current–voltage characteristics curves also depicted a significant increase in the value of current versus voltage at equimolar concentration of chitosan and ZnO. It can be concluded that the biocompatible, eco-friendly and low cost chitosan/ZnO composite hydrogels can be used for food packaging and biomedical applications. POLYM. COMPOS., 35:79–85, 2014. © 2013 Society of Plastics Engineers