交联壳聚糖珠的制备及其对染料的脱色性能

Preparation of Crosslinked Chitosan Microbeads with Different Sizes and Effects on Dye Decolorization

通过自行配置壳聚糖珠制备仪元件,成功制备出5种不同粒径的壳聚糖珠(CTS-B)。在控制系统电压为5.6 k V的条件下,制备出一种平均粒径为420μm的最小壳聚糖珠CTS-B1,其平均比表面积达到1.31 m2/g。以5种制备的CTS-B为载体,通过戊二醛交联化,进一步制备出交联壳聚糖珠CCTS-B。在25℃、转速180 r/min和脱色30 min的反应条件下,所制备的粒径最小的CCTS-B1对染料酸性绿AG25的脱色率最高,达到82.3%;在相同条件下CCTS-B1对酸性红18、活性蓝198、活性蓝220和直接红243的最高脱色率分别达到82.2%、75.4%、79.2%和83.2%,均显著高于非交联CTS-B1的脱色率。

Through self-configured instrument components, a facile and applicable chitosan-microsome preparation system was developed, and was successfully used to prepare five chitosan microbeads（CTS-B） with different particle sizes. Under the given working voltage of 5.6 k V, the system generated a size-minimized microbead namely CTS-B1, with a minimal average particle-diameter of 420 μm and a maximum average specific surfacearea of 1.31 m2/g. The crosslinked chitosan microbeads CCTS-B was subsequently prepared through crosslinking CTS-B mediated by glutaraldehyde, and was further subjected to Acid Green 25（AG25） decolorization. Results showed that CCTS-B1 had a highest decolorization rate of 82.3 %over the crosslinked chitosan microbeads towards AG25 under normalized reaction conditions of 25 ℃, 180 r/min and 30 min for decolorization. Moreover, CCTS-B1 also exhibited versatile decolotization capacity towards several other synthetic dyes including Acid Red 18, Active Blue 198, Active Blue 220 and Direct Red 243, with significant decolorization rates of these dyes at 82.2%, 75.4%, 79.2% and 83.2%, respectively, which were remarkably higher than those from non-crosslinked microbead CTS-B1.