3-COMPONENT LANGMUIR-BLODGETT-FILMS WITH A CONTROLLABLE DEGREE OF POLARITY

被引：130

作者：

BERG, JM ^{[1
]}

ERIKSSON, LGT ^{[1
]}

CLAESSON, PM ^{[1
]}

BORVE, KGN ^{[1
]}

机构：

[1] INST SURFACE CHEM,S-11486 STOCKHOLM,SWEDEN

来源：

LANGMUIR | 1994年 / 10卷 / 04期

关键词：

D O I：

10.1021/la00016a041

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two different series of mixed Langmuir-Blodgett (LB) films with a controllable degree of polarity, deposited on mica, have been studied by wetting and surface force techniques. Both series contain 50% eicosylamine (EA). Films of one series consist of EA, arachidic acid, and docosandioic acid, while those of the other consist of EA, 1-eicosanol, and 1,22-docosandiol. Carboxylic acid groups give lower contact angles than hydroxy groups. Concerning the stability of the LB films in aqueous solutions, repeated exposure to a three-phase line and high salt solutions were found to cause breakdown. Surface force measurements on carboxylic acid-containing films show that films with a 0% (contact angle = 113-degrees) and 25% (contact angle almost-equal-to 90-degrees) content of diacid interact with a long-range (hydrophobic) attraction across water. No similar long-range attraction is observed for the 50% case (contact angle almost-equal-to 65-degrees). Surface force measurements also detected instabilities and imperfections of the films.

引用

页码：1225 / 1234

页数：10

共 33 条

[1]

ADAMSON AW, 1990, PHYSICAL CHEM SURFAC

[2] LONG-RANGE ATTRACTION BETWEEN HYDROPHOBIC SURFACES [J].