Kinetics of adsorption of self-assembled films from doped poly(o-ethoxyaniline)

被引：20

作者：

Mattoso, LHC

Paterno, LG

Campana, SP

Oliveira, ON

机构：

[1] USP,INST QUIM SAO CARLOS,BR-13560970 SAO CARLOS,SP,BRAZIL

[2] USP,INST FIS SAO CARLOS,BR-13560970 SAO CARLOS,SP,BRAZIL

来源：

SYNTHETIC METALS | 1997年 / 84卷 / 1-3期

关键词：

self-assembly; poly(o-ethoxyaniline); adsorption;

D O I：

10.1016/S0379-6779(97)80676-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The adsorption process of alternated, ultra-thin films of carboxymethylcellulose (CMC) and HCl-doped poly(o-ethoxyaniline) onto glass substrates via the self-assembly (SA) technique was studied using W-vis spectroscopy. The kinetics of adsorption for the Ist, 2nd, 5th and 10th bilayers consists of a first order process for polymer concentrations from 10(-4) to 10(-2) M, with characteristic times of the order of 100 s, regardless of the solution pH in the range from 1 to 5. It was also observed that adsorption is faster and more effective for pH=1. This probably occurs because at lower pHs the polymer is more strongly doped which promotes an increase in the electrostatic attraction of the polymeric molecules to the substrate.

引用

页码：123 / 124

页数：2

共 5 条

[1] BUILDUP OF ULTRATHIN MULTILAYER FILMS BY A SELF-ASSEMBLY PROCESS .3. CONSECUTIVELY ALTERNATING ADSORPTION OF ANIONIC AND CATIONIC POLYELECTROLYTES ON CHARGED SURFACES [J].