Layer-by-layer assembly of poly (N-acryloyl-N′-propylpiperazine) and poly (acrylic acid):: Effect of pH and temperature

被引：41

作者：

Chang, Lei ^{[1
]}

Kong, Xiangxi ^{[1
]}

Wang, Fang ^{[1
]}

Wang, Liyan ^{[1
]}

Shen, Jiacong ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

THIN SOLID FILMS | 2008年 / 516卷 / 08期

基金：

中国国家自然科学基金;

关键词：

multilayer film; thermo-responsive polymer; pH response; degree of ionization; conformation;

D O I：

10.1016/j.tsf.2007.07.188

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Layer-by-layer assembly technique was applied to fabricate multilayer films of poly(N-acryloyl-N'-propylpiperazine) (PAcrNPP) and poly (acrylic acid). The film buildup was followed by Quartz Crystal Microbalance, and the effect of temperature and pH on the layer-by-layer assembly was investigated. Below the lower critical solution temperature of PAcrNPP, the adsorption amount increased with increase of temperature. As the pH of dipping solutions was systematically varied from 2.0 to 7.5, adsorption amount of polymers initially increased and then decreased. The relationship between adsorption amount and degree of ionization of polymers was discussed. When an eight-bilayer film was alternately exposed to HCl aqueous solution (pH=3.5) and neutral water (pH=6.5), the film showed pH-response, which could be the result of polymer rearrangement. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：2125 / 2129

页数：5

共 41 条

[1]

Surface interactions during polyelectrolyte multilayer build-up. 2. The effect of ionic strength on the structure of preformed multilayers [J].