聚（丙烯酸）-镧系元素络合物胶体与聚（二烯丙基二甲基氯化铵）的逐层组装动力学

Dynamics of the layer-by-layer assembly of a poly(acrylic acid)-lanthanide complex colloid and poly(diallyldimethyl ammonium).

作者信息

Xu Jiali, Wang Zhiliang, Wen Lingang, Zhou Xianju, Xu Jian, Yang Shuguang

机构信息

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.

出版信息

Soft Matter. 2016 Jan 21;12(3):867-75. doi: 10.1039/c5sm02044a. Epub 2015 Nov 9.

DOI:10.1039/c5sm02044a

PMID:26549538

Abstract

Poly(acrylic acid) (PAA) and lanthanide (Ln) ions, such as Ce(3+), Eu(3+), and Tb(3+), were prepared as dispersed complex colloidal particles through three different protocols with rigorous control of the pH value and mixing ratio. The negatively charged PAA-Ln complex particles were layer-by-layer (LbL) assembled with positively charged poly(diallyldimethyl ammonium) (PDDA) to prepare a thin film. The film thickness growth is much quicker than PDDA/PAA film. Due to the incorporation of Ln(3+) ions, the film exhibits fluorescence. During LbL assembly, PDDA-PAA association based on electrostatic force and PAA-Ce association based on coordination are in competition, which leads to the LbL assembly of PDDA and PAA-Ln complex colloidal particles being a complicated dynamic process.

摘要

通过三种不同的方案，在严格控制pH值和混合比例的条件下，制备了聚丙烯酸（PAA）与铈（Ce(3+)）、铕（Eu(3+)）和铽（Tb(3+)）等镧系（Ln）离子的分散复合胶体颗粒。带负电荷的PAA-Ln复合颗粒与带正电荷的聚二烯丙基二甲基氯化铵（PDDA）进行逐层（LbL）组装以制备薄膜。该薄膜的厚度增长比PDDA/PAA薄膜快得多。由于掺入了Ln(3+)离子，该薄膜呈现出荧光。在LbL组装过程中，基于静电力的PDDA-PAA缔合和基于配位的PAA-Ce缔合相互竞争，这导致PDDA和PAA-Ln复合胶体颗粒的LbL组装成为一个复杂的动态过程。