电导滴定法研究阳离子乳胶粒的导电性能及其在棉织物上的吸附

doi:10.3724/SP.J.1095.2014.30389

摘要/Abstract

摘要： 阳离子乳胶粒与棉纤维存在静电作用而发生吸附，研究其导电能力与吸附作用具有重要理论和应用价值。采用电导滴定法通过测定乳胶粒表面氯离子含量，研究了乳胶粒的导电能力，并探讨了乳胶粒在棉纤维表面的吸附模型。结果表明，阳离子乳胶粒的浓度(cp)在0.05~0.3×10-8 mol/L 范围内与电导率(Λ)呈良好的线性关系(Λ=8.0913cp+1.8093,R2=0.9986)；根据电解质理论计算得出阳离子乳胶粒中胶核的极限摩尔电导率在恒定温度（25 ℃）下随着乳胶粒浓度的增加呈降低趋势；此外，阳离子乳胶粒在棉纤维表面的吸附符合Langmuir型吸附模型。

关键词: 电导滴定, 阳离子乳胶粒, 摩尔电导率, 吸附模型

Abstract: The electrostatic interaction,and adsorption of cationic latex on the surface of cotton fibers have been extensively studied because of their practical and theoretical importance. In this paper, conductometric titration was used to determine the chloride ion content at the surface of cationic latex and to analyze the conductivity of cationic latex. Moreover, the adsorption isotherm of cationic latex on cotton fabrics was explored deeply. Within the range of 0.05~0.3×10-8 mol/L, a good linear relationship between the concentration(cp) of latex and the conductivity(Λ) was obtained(Λ=8.0913cp+1.8093, R2=0.9986). The limiting molar conductivity of cationic colloidal nucleus, calculated according to the electrolyte theory, was not a constant at 25 ℃. The limiting molar conductivity decreased with the increase of the latex′s concentration. Finally, the adsorption isotherm of cationic latex on cotton fabrics was fitted to the Langmuir adsorption isotherm model.

Key words: conductometric titration, cationic latex particles, molar conductivity, adsorption isotherm model

中图分类号:

O641
O646

贺东琴, 房宽峻. 电导滴定法研究阳离子乳胶粒的导电性能及其在棉织物上的吸附[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30389.

HE Dongqin, FANG Kuanjun*. Studies on the Conductivity of Cationic Latexes and Its Adsorption on Cotton Fabrics by Conductometric Titration[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30389.

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