title: Preparation and characterization of monolayer and multilayer Langmuir-Blodgett films of a series of 6-O-alkylcelluloses.
abstract: Monolayer and multilayer Langmuir-Blodgett (LB) films of 6-O-alkylcelluloses with various chain lengths were prepared and studied. The surface pressure (pi)-area (A) isotherms of 6-O-alkylcelluloses exhibited characteristic behaviors depending on the length of the alkyl chain and temperature. 6-O-Stearylcellulose on the subphase formed a homogeneous monolayer at 10 mN m(-1). By transfer ratio, FT-IR, and contact angle measurements, it was proved that the monolayer of 6-O-stearylcellulose on the water surface was transferred successfully onto a substrate by a vertical dipping method to form a Z-type LB film. The transmission and reflection absorption IR spectrum indicated that the hydrocarbon chains had all-trans rotamers and were oriented nearly perpendicular to the surface in the film. AFM section analysis revealed that the thickness per layer was calculated to be 2.35 nm. These results suggested that the hydrocarbon chains were inclined at an angle of about 25.3 degrees to have high packing density in the alkyl region.
authors: Division of Forest and Biomaterials Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
authors: Shinsuke
authors: S
authors: Ifuku
authors: Shinji
authors: S
authors: Nakai
authors: Hiroshi
authors: H
authors: Kamitakahara
authors: Toshiyuki
authors: T
authors: Takano
authors: Yoshinobu
authors: Y
authors: Tsujii
authors: Fumiaki
authors: F
authors: Nakatsubo
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics
chemical_list: D002482:Cellulose