ADSORPTION OF THE POLY(OXYETHYLENE) NONIONIC SURFACTANT C12E5 TO SILICA - A STUDY USING ATOMIC FORCE MICROSCOPY

被引:129
作者
RUTLAND, MW [1 ]
SENDEN, TJ [1 ]
机构
[1] AUSTRALIAN NATL UNIV,RES SCH PHYS SCI,DEPT APPL MATH,CANBERRA,ACT 2601,AUSTRALIA
关键词
D O I
10.1021/la00026a009
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The forces between a spherical silica particle of colloidal dimension and a smooth silica surface have been measured in aqueous solution as a function of the concentration of the nonionic surfactant pentakis(oxyethylene) dodecyl ether. In the absence of surfactant the interaction between silica surfaces was purely repulsive, being composed of electrostatic and hydration forces, whereas at low surfactant concentrations (almost-equal-to 2 x 10(-5) M, about one-third the critical micelle concentration (cmc)) the repulsion was replaced at short separations by an attractive force which pulled the surfaces into adhesive contact. At higher concentrations (almost-equal-to 4 x 10(-5) M) the surfaces still experienced an attractive force at small separations, but the adhesion decreased markedly. At concentrations above the cmc repulsive steric forces are observed. A tentative scheme for the adsorption of poly(oxyethylene) surfactant to silica is presented.
引用
收藏
页码:412 / 418
页数:7
相关论文
共 68 条
[1]   LONG-RANGE ATTRACTION BETWEEN HYDROPHOBIC SURFACES [J].
ATTARD, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (17) :6441-6444
[2]   ATOMIC FORCE MICROSCOPE [J].
BINNIG, G ;
QUATE, CF ;
GERBER, C .
PHYSICAL REVIEW LETTERS, 1986, 56 (09) :930-933
[3]   A SIMPLE ALGORITHM FOR THE CALCULATION OF THE ELECTROSTATIC REPULSION BETWEEN IDENTICAL CHARGED SURFACES IN ELECTROLYTE [J].
CHAN, DYC ;
PASHLEY, RM ;
WHITE, LR .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1980, 77 (01) :283-285
[5]   NOTE ON ADHESION VALUES FROM DIRECT FORCE MEASUREMENTS [J].
CHRISTENSON, HK ;
CLAESSON, PM .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1990, 139 (02) :589-590
[6]   CAVITATION AND THE INTERACTION BETWEEN MACROSCOPIC HYDROPHOBIC SURFACES [J].
CHRISTENSON, HK ;
CLAESSON, PM .
SCIENCE, 1988, 239 (4838) :390-392
[7]   DIRECT MEASUREMENT OF TEMPERATURE-DEPENDENT INTERACTIONS BETWEEN NONIONIC SURFACTANT LAYERS [J].
CLAESSON, PM ;
KJELLANDER, R ;
STENIUS, P ;
CHRISTENSON, HK .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1986, 82 :2735-2746
[8]   PHASE EQUILIBRIA OF DODECYLHEXAOXYETHYLENE GLYCOL MONOETHER IN WATER [J].
CLUNIE, JS ;
GOODMAN, JF ;
SYMONS, PC .
TRANSACTIONS OF THE FARADAY SOCIETY, 1969, 65 (553P) :287-&
[9]   THERMODYNAMICS OF NON-IONIC SURFACE-ACTIVE AGENT+WATER SYSTEMS [J].
CLUNIE, JS ;
CORKILL, JM ;
GOODMAN, JF ;
SYMONS, PC ;
TATE, JR .
TRANSACTIONS OF THE FARADAY SOCIETY, 1967, 63 (539P) :2839-&
[10]   STUDY OF SURFACTANT ADSORPTION ON COLLOIDAL PARTICLES [J].
CUMMINS, PG ;
STAPLES, E ;
PENFOLD, J .
JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (09) :3740-3745