MONOLAYER AND MULTILAYER LANGMUIR-BLODGETT-FILMS OF CELLULOSE TRI-N-ALKYL ESTERS STUDIED BY TRANSMISSION ELECTRON-MICROSCOPY

被引:22
作者
ITOH, T [1 ]
TSUJII, Y [1 ]
SUZUKI, H [1 ]
FUKUDA, T [1 ]
MIYAMOTO, T [1 ]
机构
[1] NAGAOKA UNIV TECHNOL,DEPT BIOENGN,NAGAOKA,NIIGATA 94021,JAPAN
关键词
CELLULOSE ESTERS; MONOLAYER FILMS; MULTILAYER FILMS; HOMOGENEOUS FILMS; ELECTRON MICROSCOPY;
D O I
10.1295/polymj.24.641
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The mono- and multilayer Langmuir-Blodgett films of cellulose tri(n-decanoate) (CTD) and cellulose tri(n-octadecanoate) (CTO) were prepared and studied with their fine structures and layer thicknesses by transmission electron microscopy. CTD was found to give a perfectly homogeneous monolayer film. The observed values of the film thickness L and the limiting area A indicated that the alkyl side chains are nearly fully extended and closely packed. The pi-A isotherm of this polymer (but not of CTO) exhibited a plateau region, which was interpreted in terms of a monolayer-to-bilayer transition. CTO also gave a homogeneous monolayer film, which was repeatedly transferred to give multilayer films with a homogeneous surface structure. The observed values of L and A suggested that the alkyl side chains in each layer are essentially extended, but in a somewhat poorly defined fashion as compared with those in thc CTD film.
引用
收藏
页码:641 / 652
页数:12
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