Ultrathin coatings by multiple polyelectrolyte adsorption/surface activation (CoMPAS)
Ultrathin coatings by multiple polyelectrolyte adsorption/surface activation (CoMPAS)
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DOI：
10.1021/ma980589a
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发表时间：
1998-12-29
期刊：
影响因子：
5.5
通讯作者：
Wischerhoff, E
中科院分区：
文献类型：
--
作者：
Koetse, M;Laschewsky, A;Wischerhoff, E
提出了一种新的制备聚合物薄膜的通用方法。它是基于静电相互作用对反应性聚电解质的吸附。在接下来的活化步骤中，通过与携带互补电荷的低摩尔质量试剂反应来修饰吸附的聚合物，以便在表面诱导电荷反转。这个过程允许有规律的逐层生长。利用破坏或产生染料的偶联反应，特别是通过供体-受体取代，可以很容易地跟踪多层生长。偶氮染料的偶联，菁染料和类似物的羟醛缩合，或活性染料的迈克尔加成被发现特别有用。所得到的多层膜固有地具有非中心对称结构。
A new versatile method for the preparation of thin polymer coatings is presented. It is based on the adsorption of reactive polyelectrolytes by electrostatic interactions. In a following activation step, the adsorbed polymers are modified by reacting with low molar mass reagents carrying the complementary charge, in order to induce charge reversal on the surface. This process allows regular layer-by-layer growth. Using coupling reactions that destroy or create dyes, in particular with donor-acceptor substitution, the multilayer growth can be easily followed. Coupling of azo dyes, aldol condensations of cyanine dyes and analogues, or Michael addition of reactive dyes was found to be particularly useful. The resulting multilayers inherently have a noncentrosymmetric structure.