Depletion and structuring of sodium poly(styrenesulfonate) at the silica-water interface

被引:97
作者
Milling, AJ [1 ]
机构
[1] UNIV MELBOURNE,SCH CHEM,ADV MINERAL PROD RES CTR,PARKVILLE,VIC 3052,AUSTRALIA
关键词
D O I
10.1021/jp953095d
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
An atomic force microscope has been used to study the interaction forces between spherical silica particles (of radius 3-6 mu m) and a planar silica surface mediated by aqueous solutions of sodium poly(styrenesulfonate). The experimental parameters explored were the free polymer molecular weight and concentration, the background electrolyte concentration, and pH. Force-distance curves displayed a short-range repulsion due to overlap of opposing electrical double layers and then a minimum due to depletion of the polymer. In some instances, at further surface separations, oscillatory forces indicative of polymer coil structuring were observed for both approaching and retracting surfaces.
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收藏
页码:8986 / 8993
页数:8
相关论文
共 56 条
[1]   ON INTERACTION BETWEEN 2 BODIES IMMERSED IN A SOLUTION OF MACROMOLECULES [J].
ASAKURA, S ;
OOSAWA, F .
JOURNAL OF CHEMICAL PHYSICS, 1954, 22 (07) :1255-1256
[2]   INTERACTION BETWEEN PARTICLES SUSPENDED IN SOLUTIONS OF MACROMOLECULES [J].
ASAKURA, S ;
OOSAWA, F .
JOURNAL OF POLYMER SCIENCE, 1958, 33 (126) :183-192
[3]  
ATTARD P, 1989, J CHEM PHYS, V91, P308
[4]   CONCENTRATION-DEPENDENCE OF THE INTERFACIAL DEPLETION LAYER THICKNESS FOR POLYMER-SOLUTIONS IN CONTACT WITH NONADSORBING WALLS [J].
AUSSERRE, D ;
HERVET, H ;
RONDELEZ, F .
MACROMOLECULES, 1986, 19 (01) :85-88
[5]   WEAK POLYELECTROLYTES BETWEEN 2 SURFACES - ADSORPTION AND STABILIZATION [J].
BOHMER, MR ;
EVERS, OA ;
SCHEUTJENS, JMHM .
MACROMOLECULES, 1990, 23 (08) :2288-2301
[6]   THE DRAINAGE OF THIN LIQUID-FILMS BETWEEN SOLID-SURFACES [J].
CHAN, DYC ;
HORN, RG .
JOURNAL OF CHEMICAL PHYSICS, 1985, 83 (10) :5311-5324
[7]   COMPUTER-SIMULATIONS OF POLYELECTROLYTE CHAINS IN SALT SOLUTION [J].
CHRISTOS, GA ;
CARNIE, SL .
JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (12) :7661-7677
[8]   MONTE-CARLO SIMULATION OF INLAYER STRUCTURE FORMATION IN THIN LIQUID-FILMS [J].
CHU, XL ;
NIKOLOV, AD ;
WASAN, DT .
LANGMUIR, 1994, 10 (12) :4403-4408
[9]   A NONDESTRUCTIVE METHOD FOR DETERMINING THE SPRING CONSTANT OF CANTILEVERS FOR SCANNING FORCE MICROSCOPY [J].
CLEVELAND, JP ;
MANNE, S ;
BOCEK, D ;
HANSMA, PK .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1993, 64 (02) :403-405
[10]   VISCOSITY OF DILUTE POLY-ELECTROLYTE SOLUTIONS [J].
COHEN, J ;
PRIEL, Z ;
RABIN, Y .
JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (11) :7111-7116