掺锌壳聚糖气凝胶的制备与表征

Synthesis and Characterization of Zn-doped Chitosan Aerogel

摘要:

以壳聚糖和氯化锌作为前驱物通过溶胶-凝胶法制备出湿凝胶，经二氧化碳超临界干燥得到掺锌壳聚糖气凝胶。通过场发射扫描电镜（FESEM）和N2吸/脱附测试对气凝胶的微观结构和性能进行了表征，结果表明：掺锌壳聚糖气凝胶具有明显的三维纳米多孔结构；壳聚糖的含量对气凝胶的微观结构影响明显；当质量比m（壳聚糖）：m（氯化锌）=1:1时，骨架纤细，比表面积460 m2/g，平均孔径分布在3~10 nm。

Abstract:

In this study, we developed the innovation of Zn-doped Chitosan aerogel using Chitosan as template and ZnCl2 as precursor, which employed the properties of three-dimensional porous structure. By adopting field-emmision scanning electron microscope (FESEM) and N2 adsorption/desorption, we learn that the Zn-doped Chitosan aerogels have three-dimensional porous structures featuring high surface area. When the mass ratio of Chitosan to ZnCl2 is 1:1, the measurements show that the aerogel has high BET surface area of 460 m²/g, average pore diameter about 3~10nm, which means the aerogel possesses the typical characteristic of porous.