Effect of the graft chain length and density on the morphology of radiation-modified polysilane monolayers at the air/water interface

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:363

Article

Tanaka, Hidenori¹  Kunai, Yuichiro¹  Sato, Nobuhiro¹  Matsuyama, Tomochika¹ 

[1] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan

关键词: Polysilanes;    Graft copolymers;    gamma-Rays;    Radiation modification;    Monolayers;    LB films;   

DOI  :  10.1016/j.jcis.2011.07.082

来源: Elsevier

【 摘 要 】

The variation in the morphology of monolayers at the air/water interface is investigated for two kinds of radiation-modified polysilanes with different structures: poly(diethyl fumarate)-grafted poly(methyl-n-propylsilane) (PMPrS-g-PDEF) and maleic anhydride-grafted PMPrS (PMPrS-g-MAH). PMPrS-g-PDEF has long but sparsely-attached PDEF graft chains, while PMPrS-g-MAH has short but densely-attached MAH graft units. Surface pressure-area measurements indicate that PMPrS-g-PDEF monolayers extensively spread at the air/water interface though PMPrS homopolymer hardly spreads. AFM observation reveals that PMPrS-g-PDEF monolayers have an inhomogeneous structure containing string-like microstructures. This result suggests that PMPrS main chains are detached from the water surface to aggregate together and only PDEF chains spread over the water surface. In contrast, PMPrS-g-MAH forms uniform monolayers with a smooth surface. PMPrS main chains of PMPrS-g-MAH are anchored to the water surface by densely grafted MAH units. It is also demonstrated that only the PMPrS-g-MAH monolayers are successfully deposited layer-by-layer on a solid substrate by the Y-type deposition. (C) 2011 Elsevier Inc. All rights reserved.

【 授权许可】

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