一种壳聚糖改性产物的制备工艺及其产品吸附性能的研究

Study on Preparation Technology of a Modified Chitosan Product and Its Adsorption Performance

以壳聚糖(CTS)为母体,加入冰醋酸溶解得到CTS溶液,以无水乙醇为致孔剂,制备多孔壳聚糖微球,将制得的CTS微球与环氧氯丙烷(ECH)交联,制备出羟丙基壳聚糖微球(HPCTS),对产物进行红外光谱和电镜扫描性能表征。通过红外光谱图分析可以看出,ECH与CTS进行了交联反应。比较CTS和HPCTS的电镜扫描图片,发现HPCTS表面因为交联反应而形成大量多孔结构,增加了大量可供吸附重金属离子的空穴,使得HPCTS比交联前的表面积有了大幅提高。通过单因素实验,研究了制备HPCTS的工艺参数,在较优工艺参数下制备的产物交联度可达75.23%,产品具有良好的可再生性。

In this paper,chitosan(CTS)was dissolved in glacial acetic acid to obtain CTS solution,and anhydrous eth⁃anol was used as pore-forming agent to prepare porous chitosan microspheres.The prepared CTS microspheres were crosslinked with epichlorohydrin(ECH),and hydroxypropyl chitosan microspheres(HPCTS)were prepared.The prod⁃ucts were characterized by infrared spectrum and scanning electron microscope.Through infrared spectrum analysis,it can be seen that ECH and CTS were crosslinked.Comparing the SEM images of CTS and HPCTS,it was found that the surface of HPCTS formed a large number of porous structures due to cross-linking reaction,which increased a large number of holes for adsorbing heavy metal ions,which greatly improved the surface area of HPCTS compared with that before cross-linking.Through single factor experiment,the technological parameters of preparing HPCTS were studied,and the crosslinking degree of the product prepared under better technological parameters could reach 75.23%,and re⁃producibility of the product is good.