不同碳纳米管对壳聚糖膜性能的影响研究

目的研究普通碳纳米管(MWNT)与羧基化碳纳米管(MWNT-COOH)对壳聚糖复合膜性能的影响。方法将质量分数不同的MWNT与MWNT-COOH分别添加到壳聚糖基材中,采用溶液共混法制得纳米复合膜,并对复合膜的溶胀性能、透湿性能、力学性能、表面形貌和抑菌性能等进行表征。结果当MWNT和MWNT-COOH的质量分数均为1%时,2种复合膜的阻湿性能和拉伸性能相对于纯壳聚糖膜有明显改善,尤其是MWNT-COOH,2种碳纳米管的加入均可增强复合膜对大肠杆菌的抑制效果。结论浓度相同时,与MWNT相比,MWNT-COOH与壳聚糖间具有更强的结合力,它的加入能更有效地改善壳聚糖膜的性能。

Effects of Different Carbon Nanotubes on the Properties of Chitosan Films

Objective To study the effects of different kinds of carbon nanotubes on the properties of chitosan composite films. Methods Different mass fractions of common multi-wall carbon nanotubes (MWNT) and carbonyl multi-wall carbon nanotubes (MWNT-COOH) were respectively incorporated into chitosan films using solution blending. The composite films prepared were then characterized by swelling test, moisture permeability measurement, tensile testing, SEM, and antimicrobial experiment. Results With low loadings of MWNT and MWNT-COOH (1%), the moisture barrier properties and the tensile strength of both composite films were considerately improved compared to those of the neat chitosan film, especially the MWNT-COOH-blended film. The composite films also displayed improved antibacterial properties towards E. coli compared to the neat chitosan film. Conclusion At the same loading, the composite films containing MWNT-COOH showed better performance compared to the films containing MWNT, which might be attributed to the stronger binding force between MWNT-COOH and chitosan.