Long-range structural order, Moire patterns, and iridescence in latex-stabilized foams

被引：104

作者：

Fujii, Syuji ^{[1
]}

Ryan, Anthony J. ^{[1
]}

Armes, Steven P. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 24期

关键词：

D O I：

10.1021/ja060640n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We describe the facile production of highly stable foams stabilized solely by micrometer-sized, sterically stabilized polystyrene (PS) latex particles. Such foams can survive for more than one year in the wet state and remain intact after drying. In contrast, foams stabilized with either sodium dodecyl sulfate or poly(N-vinylpyrrolidone) were destroyed after removal of the aqueous phase. Scanning electron microscopy studies reveal hexagonally close-packed arrays of PS particles within the dried foam, which suggests high colloid stability for the PS particles prior to their adsorption at the air-water interface. Localized moire patterns are observed by optical microscopy due to the formation of well-defined latex bilayers with exquisite long-range order. Moreover, the dried foams are highly iridescent in bright transmitted light, which may offer potential applications in security inks and coatings.

引用

页码：7882 / 7886

页数：5

共 40 条

[1] Foam superstabilization by polymer microrods [J].