Sodium stearate adsorption onto titania pigment

被引:48
作者
Capelle, HA [1 ]
Britcher, LG [1 ]
Morris, GE [1 ]
机构
[1] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia
基金
澳大利亚研究理事会;
关键词
titanium dioxide; alumina; sodium stearate; adsorption; DRIFT spectroscopy; TGA;
D O I
10.1016/j.jcis.2003.08.031
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
The interaction of sodium stearate with titania pigment particles from aqueous suspension has been investigated using thermal analysis and infrared spectroscopy combined with electrochemical studies. Thermogravimetric analysis (TGA) was used both to determine the adsorption isotherm and to investigate the interaction behavior. Monolayer coverage is determined to be 0.95 mg/m(2); however, unlike the case with organic solvents, multilayer adsorption occurs. Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, combined with TGA, revealed that the surface monolayer is chemically bound. DRIFT spectroscopic data also indicated that the stearate bridged across two aluminum atoms. Subsequent stearate layers were physisorbed to the stearate monolayer and were readily removed with acetone washing. (C) 2003 Elsevier Inc. All rights reserved.
引用
收藏
页码:293 / 300
页数:8
相关论文
共 44 条
[21]  
MACKENZIE M, 1986, CHEM REAGENTS MINERA, P139
[22]   ADSORPTION OF FATTY-ACID SPIN PROBES ON AMORPHOUS ALUMINA [J].
MCBRIDE, MB .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1980, 76 (02) :393-398
[23]   DETERMINATION OF MOLECULAR-ORIENTATION AND THICKNESS OF SELF-ASSEMBLED MONOLAYERS OF OLEATE ON APATITE BY FTIR REFLECTION SPECTROSCOPY [J].
MIELCZARSKI, JA ;
MIELCZARSKI, E .
JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (10) :3206-3217
[24]   Polymer depressants at the talc-water interface: adsorption isotherm, microflotation and electrokinetic studies [J].
Morris, GE ;
Fornasiero, D ;
Ralston, J .
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2002, 67 (1-4) :211-227
[25]  
OTTEWILL RH, 1967, J OIL COLOUR CHEM AS, V50, P844
[26]  
OVERBEEK JTG, 1958, WEEKBLAD, V54, P687
[27]   Adsorption of stearic acid and diethylhexyl phosphate on magnetic metallic iron pigments: Electrical surface charging and adsorption competition [J].
Papirer, E ;
Walter, E ;
Vidal, A ;
Siffert, B .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1997, 187 (02) :529-538
[28]  
Polunina IA, 1999, COMPOS INTERFACE, V6, P49
[29]  
SHERWOOD AF, 1966, J OIL COLOUR CHEM AS, V49, P648
[30]  
Silverstein R.M., 1991, SPECTROSCOPIC IDENTI