带有用于稳定多层膜的光反应性叠氮基的聚丙烯酸

Poly(acrylic acid)-bearing photoreactive azido groups for stabilizing multilayer films.

作者信息

Wu Guanglu, Shi Feng, Wang Zhiqiang, Liu Zan, Zhang Xi

机构信息

Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, PR China.

出版信息

Langmuir. 2009 Mar 3;25(5):2949-55. doi: 10.1021/la804261f.

DOI:10.1021/la804261f

PMID:19437767

Abstract

In this article, we have demonstrated a universal method for improving the stability of polyelectrolyte multilayer films by designing a photoreactive polyanion as the building block for layer-by-layer (LbL) self-assembly. By grafting an azido group into poly(acrylic acid), we synthesized a photoreactive polyanion, which can induce the photo-crosslinking between the azido group and polymeric backbone under UV irradiation. Our results show that after photocross-linking, the stability of the polyelectrolyte multilayer is greatly improved. Considering that the polyanion-bearing azido group is highly reactive, we have shown that it can be used to stabilize different LbL films. Moreover, by taking advantage of the different stability before and after UV irradiation, a patterned surface can be fabricated, which could be used as a template for selective adsorption.

摘要

在本文中，我们展示了一种通用方法，即通过设计一种光反应性聚阴离子作为逐层（LbL）自组装的构建块来提高聚电解质多层膜的稳定性。通过将叠氮基接枝到聚丙烯酸中，我们合成了一种光反应性聚阴离子，它能在紫外线照射下诱导叠氮基与聚合物主链之间发生光交联。我们的结果表明，光交联后，聚电解质多层膜的稳定性得到了极大提高。鉴于带有叠氮基的聚阴离子具有高反应活性，我们已证明它可用于稳定不同的LbL膜。此外，利用紫外线照射前后的不同稳定性，可以制造出有图案的表面，其可作为选择性吸附的模板。