Monolayers and thin films of dextran hydrophobically modified

Journal of the Brazilian Chemical Society

Angel Leiva²  Natalia Muñoz²  Marcela Urzúa¹  Ligia Gargallo²  Deodato Radic² 

[1] ,Pontificia Universidad Católica de Chile Facultad de Química Departamento de Química FísicaSantiago,Chile

关键词: dextran;    ε-caprolactone;    block copolymers;    biodegradable;    copolymers;   

DOI  :  10.1590/S0103-50532010000100013

来源: SciELO

【 摘 要 】

A series of biodegradable graft copolymers were synthesized by grafting ε-caprolactone over dextran of different molecular weights. The obtained copolymers were characterized by Fourier transform infrared spectroscopy FTIR, proton nuclear magnetic resonance ¹H NMR, thermogravimetry and elemental analysis. Stable monolayers at the air-water interface and spin coated thin films were prepared and characterized by the Langmuir technique and by contact angle measurements respectively. The compressibility and static surface elasticity of the monolayers and the surface energy of copolymer thin films show dependence with the ε-caprolactone content. From these results it can be concluded that the surface properties of grafted copolymers can be modulated by their composition. Additionally, according to the obtained results, ε-caprolactone grafted-dextrans show potential for being used in different applications where surface properties are important.

【 授权许可】

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