Thermoresponsive, optically active films based on Diels-Alder chemistry

被引：21

作者：

Costanzo, Philip J. ^{[1
]}

Beyer, Frederick L. ^{[1
]}

机构：

[1] USA, Res Lab, Div Mat, Attn AMSRD ARL WM MA, Aberdeen Proving Ground, MD 21005 USA

来源：

CHEMISTRY OF MATERIALS | 2007年 / 19卷 / 25期

关键词：

D O I：

10.1021/cm701864r

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：

Reversible Diels-Alder chemistry was exploited to develop polymer films in which a change in optical clarity can be thermally triggered. SiO2 nanoparticles of various sizes were functionalized with maleimido moieties. A furyl-terminated poly(ethylene glycol) linker was prepared and tethered to the SiO2, nanoparticles via a Diels-Alder (DA) linkage. The pegylated SiO2 nanoparticles were randomly distributed within a poly(methyl methacrylate) (PMMA) matrix, resulting in an optically transparent film. Annealing the film cleaves the DA linkage and effectively renders the SiO2 particles immiscible within the PMMA matrix creating a driving force for particle aggregation. The large aggregates were able to scatter light and resulted in an optically opaque film.

引用

页码：6168 / 6173

页数：6

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