多胺桥联聚倍半硅氧烷/壳聚糖蛇-笼型复合材料的制备及其对Au(Ⅲ)的吸附性能研究

Preparation of Polyamine-bridged Polysilsesquioxane/Chitosan Snake-cage Composites and the Adsorption Properties for Au(Ⅲ)

本研究以3-氯丙基三甲氧基硅烷(CPTS)、乙二胺(EDA)和二乙烯三胺(DETA)为原料,制备两种单体B-DETA-m和B-EDA-m,然后将桥联单体与不同比例壳聚糖(CTS)反应,合成了EDA/CTS和DETA/桥联聚倍半硅氧烷(BPS)两个系列蛇-笼型复合材料。对复合材料进行了红外光谱、比表面积及孔隙度分析、扫描电镜等表征,考察了复合材料对Au(Ⅲ)的吸附性能。结果表明,CTS的加入能够有效提高材料的吸附性能,其中拥有较丰富孔隙度和较大比表面积的EDA/CTS-30和DETA/CTS-30对Au(Ⅲ)吸附能力最强。本研究为含CTS和BPS的新型吸附剂、色谱柱等材料的研发提供了理论依据,可应用于污水处理,对后续环境治理研究具有积极意义。

The monomers B-DETA-m and B-EDA-m were prepared from 3-chloropropyltrimethoxysilane(CPTS),ethylenediamine(EDA)and diethylenetriamine(DETA).Two series of snake-cage composites,EDA/CTS and DETA/BPS,were synthesized by reacting bridging monomers with different ratios of chitosan(CTS).The composites were characterized by infrared spectroscopy,specific surface area and porosity analysis,and scanning electron microscopy to investigate the adsorption properties of the composites for Au(Ⅲ).The results show that the addition of CTS can effectively improve the adsorption performance of the materials,among which EDA/CTS-30 and DETA/CTS-30,which possess richer porosity and larger specific surface area,have the strongest adsorption capacity for Au(Ⅲ).This work has provided a theoretical basis for the development of new adsorbents,adsorption columns and other materials containing CTS and BPS,which can be applied to the sewage treatment,and is of positive significance to the subsequent research on environmental treatment.