在非水介质中制备聚电解质静电吸附自组装膜

静电吸附自组装是近年来得到广泛研究和应用的一种制备超薄膜的方法,具有操作简单,膜厚可控等很多优点,已经被广泛应用于制备各种功能薄膜材料1~4].通常情况下,聚电解质的静电吸附自组装都是在水中进行的.一方面,聚电解质在水中可以很容易的实现电离;另一方面,以水做介质可以避免有机溶剂的污染,尤其对模仿各种生物环境非常有利.所以自1991年Decher首先报道该方法以来,绝大多数的聚电解质静电吸附自组装是以水为介质.但是,以水做介质也常常会遇到一些困难,尤其对于疏水性(包括非水溶性)聚电解质来说.在当前研究的许多热点领域中如导电、发…

CONSTRUCTION OF POLYELECTROLYTE SELF-ASSEMBLED MULTILAYERS IN NONAQUEOUS MEDIA

Crylic acid and azobenzene containing acrylate copolymers PEAPH were fabricated into multilayers with their counterpart polyelectrolyte(poly(diallyldimethylammonium) chloride)(PDAC) in N,N′-dimethylformamide(DMF) using the layer-by-layer electrostatic adsorption technique.The self-assembly of water soluble and insoluble PEAPH in DMF was studied and compared.FTIR was used to detect the ionization of carboxyl acid of PEAPH during the assembling processes.All results show that both the water-soluble and water-insoluble PEAPH can be deposited with PDAC based on the electrostatic attraction instead of other interactions.In assembling processes PEAPH molecules are deposited in molecular level instead of molecular aggregation and form a cross-linking multilayer structure.Assembling media of DMF and water do not have obvious influence on the multilayer structure.