聚乙烯咔唑LB膜的制备及其结构形态

Preparation and Aggregation of Poly(N-vinylcarbazole) Langmuir-Blodgett Films

利用LB技术 ,研究了具有光电活性的聚乙烯咔唑 (PVK)的单分子膜及PVK与十八胺 (ODA)混合分子膜的聚集结构形态 .结果表明纯PVK分子由于弱的亲水作用可以形成较好单分子膜 ,此时PVK分子形成片状聚集 ;而在混合体系中 ,在一定比例下PVK形成颗粒状团聚 .改变不同的比例可以得到不同的纳米图案 ,当PVK∶ODA =10∶1时形成尺寸较均一的纳米球状致密覆盖分子膜 ;当进一步增加PVK比例时 ,ODA不能再调控PVK聚集 ,混合膜表现出平坦的PVK ,ODA分相片状聚集 .

Aggregation of monolayers of poly(N-vinylcarbazole) (PVK) mixed with octadecanyl amine (ODA) was studied by Langmuir-Blodgett technique and atomic force microscopy (AFM). The results showed that pure PVK has better film-forming capability on water/air interface and can form tabular aggregations, however, it forms nano-spherical aggregations in mixed films. Different nanopatterns can be obtained by changing the ratio of PVK to ODA. In the ratio of PVK∶ODA=10∶1, the films full-covered with fine-size-distributed nano-spherical aggregations can be acquired. If the ratio increases further, nano-spherical aggregations disappear and plane aggregations of separated phase of PVK and ODA appear instead.