壳聚糖膜表面的氮等离子体改性研究  

Surface Modification of Chitosan Membranes by Nitrogen Plasma Treatment

作　　者：赵连娜[1,2] 任力[1,2] 尹诗衡[1,2] 赵娜如[1,2] 王迎军[1,2] 陈浩[3] 瞿佳[3] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]华南理工大学特种功能材料教育部重点实验室,广州510640 [3]温州医学院,温州325027

出　　处：《材料导报》2008年第12期122-124,128,共4页Materials Reports

基　　金：国家科技支撑计划(2006BAI16B06);广东省自然科学基金团队项目(04205786);国家自然科学基金重点项目(50732003);国家"973"项目(2005CB623902)

摘　　要：采用溶液浇铸法制备了壳聚糖膜,通过氮等离子体对壳聚糖膜进行表面改性以提高其表面亲水性。采用扫描电子显微镜(SEM)、表面接触角分析仪和X射线光电子能谱(XPS)对改性前后壳聚糖膜的表面结构和性能进行分析和表征,研究了不同等离子体处理时间和不同放电功率对壳聚糖膜表面结构和性能的影响。结果表明:经氮等离子体处理后,壳聚糖膜的表面接触角可由103.0°降为48.8°,表面亲水性得到明显改善。由XPS分析得知,膜表面的氧、氮含量及氧碳比增加,表面的C-C键发生了断裂而生成新的>C=O(COOR、COOH或CONH)等极性基团,从而使其亲水性增强。Chitosan membranes are prepared by the solvent casting method. The nitrogen plasma treatment is used to improve the hydrophilicity of the surface of chitosan membranes. The surface properties are characterized by scanning electron microscopy （SEM）, contact angle analyzer and X-ray photoelectron spectroscopy （XPS）. Effects of the exposure time and plasma generating power on surface properties of the chitosan membranes are investigated. The water contact angle of chitosan membranes decreases from 103. 0° to 48. 8° after the nitrogen plasma treatment. The results indicate that the surfaces became more hydrophilic. XPS analysis shows that the oxygen content, the nitrogen content and the ratio of O/C all increase after the nitrogen plasma treatment. Furthermore, it is found that C-C bonds are broken with the nitrogen plasma treatment. 〉C=O（COOR,C（X）H,or CONH） is generated after plasma irradiation.

关 键 词：壳聚糖 等离子体处理 X射线光电子能谱 亲水性 

分 类 号：TQ616.8[化学工程—精细化工] TS193.845[轻工技术与工程—纺织化学与染整工程]