Latex macrocrystal self-assembly dependence on particle chemical heterogeneity

被引：20

作者：

Cardoso, AH ^{[1
]}

Leite, CAP ^{[1
]}

Galembeck, F ^{[1
]}

机构：

[1] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2001年 / 181卷 / 1-3期

基金：

巴西圣保罗研究基金会;

关键词：

macrocrystals; self-arrayed latex; latex microchemistry; backscattered electron imaging; scanning electric potential microscopy;

D O I：

10.1016/S0927-7757(00)00782-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：49 / 55

页数：7