Kozicki Marek, Kołodziejczyk Marek, Szynkowska Małgorzata, Pawlaczyk Aleksandra, Leśniewska Ewa, Matusiak Aleksandra, Adamus Agnieszka, Karolczak Aleksandra
Department of Man-Made Fibres, Faculty of Material Technologies and Textile Design, Lodz University of Technology, Żeromskiego 116, 90-924 Łódź, Poland; GeVero Co., Tansmana 2/11, 92-548 Łódź, Poland.
Institute of Technical Biochemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, 90-924 Łódź, Poland.
Carbohydr Polym. 2016 Apr 20;140:74-87. doi: 10.1016/j.carbpol.2015.12.017. Epub 2015 Dec 12.
This work describes a gelation of chitosan solution with silver nitrate. Above the critical concentration of chitosan (c*), continuous hydrogels of chitosan-silver can be formed. At lower concentrations, the formation of nano- and micro-hydrogels is discussed. The sol-gel analysis was performed to characterise the hydrogels' swelling properties. Moreover, the following were employed: (i) mechanical testing of hydrogels, (ii) inductively coupled plasma-optical emission spectroscopy (ICP-OES) for the measurement of silver concentration, (iii) scanning electron microscopy (SEM) to examine the morphology of products obtained, and (iv) dynamic light scattering (DLS) and UV-vis spectrophotometry to examine products formed at low concentration of chitosan (c<c*). Some hydrogels were used for modification of cotton fabric in order to give it antimicrobial properties. The products obtained acted against Escherichia coli and Bacillus subtilis apart from the chitosan used that showed no such activity.
这项工作描述了壳聚糖溶液与硝酸银的凝胶化过程。在壳聚糖的临界浓度（c*）以上，可以形成壳聚糖-银的连续水凝胶。在较低浓度下，讨论了纳米和微水凝胶的形成。进行溶胶-凝胶分析以表征水凝胶的溶胀特性。此外，还采用了以下方法：（i）水凝胶的力学测试，（ii）电感耦合等离子体发射光谱法（ICP-OES）测量银浓度，（iii）扫描电子显微镜（SEM）检查所得产物的形态，以及（iv）动态光散射（DLS）和紫外可见分光光度法检查在低壳聚糖浓度（c < c*）下形成的产物。一些水凝胶用于棉织物的改性，以赋予其抗菌性能。除了所使用的壳聚糖没有这种活性外，所得产物对大肠杆菌和枯草芽孢杆菌有作用。
