采用溶液插层法制备了不同累托石含量的壳聚糖/累托石纳米复合材料,研究了累托石含量、层间距对复合材料性能的影响及不同累托石含量的复合材料的热稳定性和抗菌性能.结果表明：壳聚糖分子链插层进入了累托石层间,累托石均匀地分布在壳聚糖基体中;纳米复合材料的性能与累托石的含量和层间距密切相关,当壳聚糖与累托石的质量比为12∶1时插层效果最好;壳聚糖/累托石纳米复合材料的抗菌能力比单一壳聚糖优异,尤其是对革兰氏阳性菌,其抑菌的最小浓度为单一壳聚糖的1/4～1/2,抑菌时间是单一壳聚糖的3～5倍;复合材料对革兰氏阳性菌的抑制作用比对革兰氏阴性菌的强,且随着累托石含量的增加及层间距的增大,抗菌性能越来越强;纳米复合材料的热稳定性优于壳聚糖.

Chitosan/rectorite nanocomposites with various rectorite contents were prepared via the solution intercalation method,and the thermal stability and antibacterial activity of the products were investigated.Then,the effects of rectorite content and interlayer distance on the properties of the products were analyzed.The results show that（1）chitosan chains insert into the rectorite layer and rectorite uniformly disperses in the chitosan matrix;（2） both the rectorite content and the interlayer distance greatly affect the properties of the nanocomposites;（3）the best intercalation effect can be achieved at a chitosan-to-rectorite mass ratio of 12∶1;（4）the nanocomposites are superior to chitosan in terms of antibacterial activity,with its minimum inhibition concentration and inhibition time for gram-positive bacteria espectively being 1/4～1/2 and 3～5 times that of chitosan;（5）the antibacterial activity of the nanocomposites,positive to the rectorite content and the interlayer distance,is better in restraining gram-positive bacteria than in restraining gram-negative bacteria;and（6）the thermal stability of the nanocomposites is stronger than that of chitosan.