改性壳聚糖加碘膜的制备与表征

Preparation and Characterization of Modified Chitosan Membrane with Iodine

摘要:

壳聚糖(CTS)和水杨醛、环氧氯丙烷交联制备壳聚糖衍生物(RS-CTS-E)，并制备相应衍生物的凝胶膜，将凝胶膜浸没在一定浓度碘乙醇溶液中，制备改性壳聚糖加碘膜(RS-CTS-E-I2)。对其进行了IR、SEM等表征。碘含量分析表明：改性壳聚糖凝胶膜对单质碘吸附量随碘乙醇溶液浓度增加而增大。碘吸附动力学结果表明其平衡吸附时间为6 h。抑菌性测试结果：I2 %(质量分数)=19.05时RS-CTS-E-I2 膜对金黄色葡萄球菌抑菌环和大肠杆菌抑菌环的抑菌环直径分别为(31 ± 1) mm和(30 ± 1)mm，均为高度敏感。

Abstract:

The modified chitosan (RS-CTS-E) and the corresponding gel membrane were prepared by chitosan (CTS) reacted with salicylaldehyde, and then cross-linked with epichlorohydrin. The modified chitosan membrane with iodine (RS-CTS-E-I2) was prepared by modified chitosan gel membrane immersed in a certain concentration of iodine in ethanol solution. The properties of the RS-CTS-E-I2 membrane were characterized by SEM, IR, etc. The analysis of iodine content showed that the adsorption of iodine of modified chitosan gel membrane increased along with the iodine concentration of ethanol. The adsorption kinetics of iodine result showed that the equilibrium adsorption time was 6 h. The antimicrobial test result showed that the antibacterial diameters of against Staphylococcus aureus and E.coli of the RS-CTS-E-I2 membrane were (31 ± 1) mm and (30 ± 1) mm, respectively, when the iodine mass fraction of the RS-CTS-E-I2 membrane was 19.05%, the bacteriostasis degree was very significant.