Abstract:

In order to prepare natural antibacterial finishing agent for cotton fabric, the antibacterial microcapsules were prepared by complex coagulation with compound extract of amaranth, sunflower and cypress as core material and chitosan-gelatin as wall material. The effects of emulsifier content, shear speed and pH on the appearance morphology and size of microcapsules were studied. The samples were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The antibacterial microcapsules were used in the finishing of cotton fabric and its antibacterial properties were tested. The results showed that the optimum preparation conditions were as follows: the mass fraction of emulsifier in colostrum was 5%, the shear rate was 8000r/min, and the pH was 5.7; the prepared microcapsules had a size distribution between 1480nm and 3580nm and good thermal stability; when the mass concentration of microcapsule was 25g/L, the mass fraction of adhesive was 5% and the hot drying temperature was 40℃, the bacteriostatic rate of the finished sample against Staphylococcus aureus andEscherichia coli was 89.30% and 81.43%, respectively, and the bacteriostatic effect was lasting.

Key words: complex coagulation method, chitosan, cotton fabric, antibacterial microcapsule, properties

摘要：

为了制备用于棉织物天然抗菌整理剂，以绿苋、龙葵和黄柏的复配提取物为芯材，壳聚糖-明胶为壁材，采用复凝聚法制备抗菌微胶囊。研究了乳化剂含量、剪切速度、pH对微胶囊的外观形态及尺寸的影响；借助扫描电子显微镜、傅里叶红外光谱仪等对样品进行表征；将抗菌微胶囊用于棉织物的整理并测试其抗菌性能。结果表明：初乳中乳化剂质量分数为5%、剪切速度为8000r/min、pH为5.7为最佳制备条件，制得的微胶囊尺寸分布在1480～3580nm且热稳定性良好；当微胶囊质量浓度为25g/L，黏合剂质量分数为5%，热烘温度为40℃，整理试样对金黄色葡萄球菌和大肠杆菌的抑菌率分别为89.30%和81.43%，且抑菌效果持久。

关键词: 复凝聚法, 壳聚糖, 棉织物, 抗菌微胶囊, 性能