Chinese Journal of Applied Chemistry

• Full Papers • Previous Articles     Next Articles

Studies on the Conductivity of Cationic Latexes and Its Adsorption on Cotton Fabrics by Conductometric Titration

HE Dongqin, FANG Kuanjun*   

  1. (Laboratory of Fiber Materials and Modern Textiles,The Growing Base for State Key Laboratory,
    College of Chemical and Environmental Engineering,Qingdao University,Qingdao 266071,China)
  • Received:2013-08-01 Revised:2013-09-12 Published:2014-05-10 Online:2014-05-10
  • Contact: fang

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

CLC Number: