Artículos de revistas
Latex macrocrystal self-assembly dependence on particle chemical heterogeneity
Registro en:
Colloids And Surfaces A-physicochemical And Engineering Aspects. Elsevier Science Bv, v. 181, n. 41699, n. 49, n. 55, 2001.
0927-7757
WOS:000167966200005
10.1016/S0927-7757(00)00782-2
Autor
Cardoso, AH
Leite, CAP
Galembeck, F
Institución
Resumen
A self-arrayed poly(styrene-co-hydroxyethylmethacrylate) film surface was examined using microscope techniques possessing microchemical capabilities, together with standard (control) techniques. Secondary electron (SEI) and backscattered electron (BEI) images obtained in a field-emission scanning microscope, as well as scanning atomic force (AFM) and electric potential (SEPM) images, show an accumulation of hydrophobic particles around point and line macrocrystal defects. Defects in self-arrayed latex films are thus largely due to latex particle chemical heterogeneities. This result is consistent with the capillary adhesion-dependent models for macrocrystal formation and it shows the importance of latex purification, prior to macrocrystallization. (C) 2001 Elsevier Science B.V. All rights reserved. 181 41699 49 55