Textile Research Division, National Research Centre, Dokki, Cairo, Egypt.
Carbohydr Polym. 2013 Jun 5;95(1):421-7. doi: 10.1016/j.carbpol.2013.03.013. Epub 2013 Mar 13.
New approach for preparation of CMC hydrogels was undertaken through reacting CMC with either malic, succinic or citric acid. Characteristics of the hydrogels, as monitored by the swelling behavior, FTIR, SEM, EDX, TEM and XRD were dependent on nature and concentration of the polycarboxylic acid, time and temperature of curing. The best practice achieved from these studies was harnessed to synthesize and characterize CMC hydrogel-ZnO-nanocomposites with additional study pertaining to the antibacterial activity of the nanocomposites. CMC hydrogel with excellent swelling behavior could be prepared by adding succinic acid (0.5%) to CMC solution then drying the obtained paste at 80 °C for 5 min followed by curing at 120 °C for 3 min. Similarly, addition of ZnNO3 solution to the CMC paste results in CMC hydrogel-ZnO-nanocomposites having biocidal activity to gram +ve and gram -ve bacteria.
通过将 CMC 与马来酸、琥珀酸或柠檬酸反应，我们采用了一种新方法来制备 CMC 水凝胶。水凝胶的特性（通过溶胀行为、FTIR、SEM、EDX、TEM 和 XRD 进行监测）取决于多羧酸的性质和浓度、固化时间和温度。从这些研究中获得的最佳实践被用于合成和表征 CMC 水凝胶-ZnO 纳米复合材料，并进一步研究了纳米复合材料的抗菌活性。通过向 CMC 溶液中添加琥珀酸（0.5%），然后将获得的糊状物在 80°C 下干燥 5 分钟，接着在 120°C 下固化 3 分钟，可制备具有优异溶胀性能的 CMC 水凝胶。同样，将 ZnNO3 溶液添加到 CMC 糊中，会得到具有杀菌活性的 CMC 水凝胶-ZnO 纳米复合材料，可杀灭革兰氏阳性菌和革兰氏阴性菌。
