Effect of pH on the preparation of self-assembled films of poly(o-ethoxyaniline) and sulfonated lignin

被引：72

作者：

Paterno, LG

Mattoso, LHC ^{[1
]}

机构：

[1] EMBRAPA, CNPDIA, Embrapa Instrumentacao Agropecuaria, BR-13560970 Sao Carlos, SP, Brazil

[2] Univ Sao Paulo, Dept Mat Engn, BR-13560970 Sao Carlos, Brazil

来源：

POLYMER | 2001年 / 42卷 / 12期

基金：

巴西圣保罗研究基金会;

关键词：

polyanilines; self-assembly; adsorption;

D O I：

10.1016/S0032-3861(01)00005-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Self-assembled films of Poly(o-ethoxyaniline) (POEA) doped with HCl alternated with sulfonated lignin (SL) were successfully produced under different pHs and their kinetics of formation studied. The adsorption at lower pi-Is is faster due to the greater electrostatic attraction between the POEA and the SL covered substrate, but a lower amount of POEA is deposited due to ch;uge repulsion of additional POEA chains and conformational steric hindrance. At higher pHs the adsorption of POEA cakes longer but it is greater due to the contribution of hydrogen bonding interactions, lower charge repulsion between POEA chains and a more compact polymer conformation. Adsorption of POEA/SL multilayers could be carried out in different types of substrates. Atomic force microscopy (AFM) employed to investigate the morphology of the alternated layers showed that POEA layers exhibited a granular rough aspect, while SI, layers presented a much smoother surface. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：5239 / 5245

页数：7

共 28 条

[1] ATOMIC-FORCE MICROSCOPY SURFACE-MORPHOLOGY STUDIES OF IN-SITU DEPOSITED POLYANILINE THIN-FILMS [J].