ATTRACTION BETWEEN LIPID BILAYER-MEMBRANES IN CONCENTRATED-SOLUTIONS OF NONADSORBING POLYMERS - COMPARISON OF MEAN-FIELD THEORY WITH MEASUREMENTS OF ADHESION ENERGY

被引：126

作者：

EVANS, E

NEEDHAM, D

机构：

[1] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1W5,BC,CANADA

[2] DUKE UNIV,DEPT MECH ENGN & MAT SCI,DURHAM,NC 27706

来源：

MACROMOLECULES | 1988年 / 21卷 / 06期

关键词：

ADHESION; -; Measurements; LIPIDS; Adhesion; MEMBRANES; Materials; POLYMERS; Solutions;

D O I：

10.1021/ma00184a049

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The authors report direct measurements of the free energy potential for adhesion of synthetic lipid bilayers in aqueous solutions of dextran (polyglucose) over a wide range of volume fraction (0. 01-0. 1) and molecular weight. These polymer solutions are well-modeled by a Flory interaction parameter of 0. 43, characteristic of a 'good' solvent. Controlled assembly of two giant bilayer vesicles was used to evaluate the free energy potential for formation of adhesive contact. The adhesion energy for neutral (phosphatidylcholine) bilayers in 0. 1 M NaCl was found to steadily increase with polymer volume fraction - without any indication of a plateau - and with little dependence of polymer size.

引用

页码：1822 / 1831

页数：10

共 34 条

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