COMPETITIVE AND DISPLACEMENT ADSORPTION OF POLYVINYL-ALCOHOL AND THE AMMONIUM SALT OF A POLYACRYLIC-ACID ON BATIO3

被引：39

作者：

DELAAT, AWM

VANDENHEUVEL, GLT

机构：

[1] Nederlandse Philips Bedrijven BV, Centre for Manufacturing Technology, 5600 MD Eindhoven, SAQ 1314

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1993年 / 70卷 / 02期

关键词：

ADSORPTION; AMMONIUM SALT; BARIUM TITANATE; DISPLACEMENT; POLYACRYLIC ACID; POLYVINYL ALCOHOL; SIZE EXCLUSION CHROMATOGRAPHY;

D O I：

10.1016/0927-7757(93)80287-O

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Adsorption isotherms for polyvinyl alcohol (PVA) and the ammonium salt of a polyacrylic acid (NH4-PAA) on BaTiO3 have been measured with separate solutions, with mixtures and after sequential addition. Size-exclusion chromatography was used to measure the amounts adsorbed from the depleted supernatants. The amounts adsorbed from separate solutions reach plateaux at 0.19 mg m-2 for PVA and 0.40 mg m-2 for NH4-PAA. Both polymers adsorb from mixtures as long as the amount of NH4-PAA is not enough to reach the plateau adsorption. Above this level no adsorption of PVA is found. If PVA is adsorbed first and the NH4-PAA added afterwards, both polymers are adsorbed at amounts almost equal to the separate plateau values. After long contact times the amount of PVA adsorbed decreases slightly to 0.17 mg m-2.

引用

页码：179 / 187

页数：9

共 29 条

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