包含纳米混合层的聚电解质多层膜的制备。

Fabrication of polyelectrolyte multilayer films comprising nanoblended layers.

作者信息

Cho Jinhan, Quinn John F, Caruso Frank

机构信息

Centre for Nanoscience and Nanotechnology, Department of Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia.

出版信息

J Am Chem Soc. 2004 Mar 3;126(8):2270-1. doi: 10.1021/ja039830d.

DOI:10.1021/ja039830d

PMID:14982407

Abstract

Polyelectrolyte multilayer thin films were prepared via the alternate deposition of poly(allylamine hydrochloride) (PAH) and a blend of poly(acrylic acid) (PAA) and poly(styrenesulfonate) (PSS). When the pH of the blend solution was 3.5, the presence of PAA in this solution significantly increased the total film thickness. With only 10 wt % PAA in the blend adsorption solution, a large increase in film thickness was observed (92 nm cf. 18 nm). It was also demonstrated that the total amount of PSS adsorbed was enhanced by the presence of PAA in the blend solution, showing that the blend solution composition influenced that of the multilayer films. Thin films prepared with nanoblended layers also showed improved pH stability, because they exhibited reduced film rearrangement upon exposure to acidic conditions (pH = 2.5).

摘要

通过交替沉积聚（烯丙胺盐酸盐）（PAH）以及聚（丙烯酸）（PAA）与聚（苯乙烯磺酸盐）（PSS）的混合物制备了聚电解质多层薄膜。当混合溶液的pH值为3.5时，该溶液中PAA的存在显著增加了总膜厚度。在混合吸附溶液中仅含有10 wt%的PAA时，就观察到膜厚度大幅增加（92 nm对比18 nm）。还证明了混合溶液中PAA的存在增强了PSS的吸附总量，表明混合溶液的组成影响了多层膜的组成。用纳米混合层制备的薄膜也表现出更好的pH稳定性，因为它们在暴露于酸性条件（pH = 2.5）时膜重排减少。