采用化学需氧量（ＣＯＤ）法测定了丙烯酸－丙烯酸酯共聚物在纳米Ｙ－ＴＺＰ粉体表面的等温吸附状况．吸附量随ｐＨ值的降低而增加．较低ｐＨ值下；离子强度对吸附量几乎没有影响；而较高ｐＨ值下，离子强度的升高会显著增加吸附量．Ｃａ２＋可改变表面共聚物的吸附构型，因此其存在会显著增加吸附量．红外光谱分析证明，共聚物的吸附是通过羧基与粉体表面金属离子的成键而实现的．
The adsorption of an acrylic copolymer on nanosized Y-TZP powder was characterized by the method of COD (chemical oxygen demand). The
adsorption density decreases with increasing pH and copolymer concentration. An increase in KNO3 concentration causes a considerable increase in adsorption density in alkaline region, but has no effect on the adsorption density in acidic region. The
adsorption density in alkaline region increases profoundly in the presence of Ca2+ due to the complexation of Ca2+ with the
copolymer. FTIR results show the existence of chemical interaction between the metal ions on the powder surface and the carboxylic acid
groups of the copolymer.
参考文献
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