Molecular Arrangement of Organo-modified Aluminosilicate in Langmuir-Blodgett Films and Mixed Monolayer Behavior with Biodegradable Polymers

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We investigated molecular arrangement of organo-modified aluminosilicate with high surface coverage in Langmuir-Blodgett (LB) films by performing out-of-plane and in-plane X-ray diffraction (XRD) measurements. In addition, the surface morphology of mixed monolayers of organo-modified aluminosilicate and several biodegradable polymers [e.g poly(L-lactide), PLLA] was also characterized by atomic force microscopy (AFM). The in-plane XRD results of multilayers of organo-modified aluminosilicate formed by the LB method indicate the formation of a two-dimensional lattice of hydrocarbons on the aluminosilicate surface. These hydrocarbons of organo-modified reagents packed hexagonal in films. Based on our experimental findings, the LB technique enabled the formation of a densely packed organo-modified aluminosilicate monolayer at the water surface. Furthermore, for mixed monolayer systems comparising an organo-modified clay with high surface coverage and biodegradable polymers, a miscible surface was observed by AFM on a mesoscopic scales, whereas those with low surface coverage formed phase-separated structures.
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