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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 6    December 2006

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Application of cetylpyridinium chloride in dispersion of antibacterial ceramic glaze
CHAI Li-yuan(柴立元), CHENG Ming-ming(程明明), PENG Bing(彭 兵), 
HUANG Yi(黄 毅), ZHANG Xiao-fei(张晓飞)

School of Metallurgical Science and Engineering, Central South University, 
Changsha 410083, China

Abstract: The adsorption of cetylpyridinium chloride(CPC) onto a ceramic glaze mixture composed of limestone, feldspar, quartz, kaolin, and antibacterial agent was studied. Both adsorption isothermals and the average particle zeta potential were investigated in order to understand the suspension stability as a function of pH, ionic strength, and surfactant concentration. The results show that under the optimal conditions such as pH value of 7 or 9, 0.01 mol/L of ionic strength and around critical micelle concentration(CMC) of surfactant, antibacterial ceramic glaze acquires fine dispersion stability. The adsorption of CPC on ceramic glaze particles is in accordance with Langmuir model in 0.01mol/L at pH=7 and pH=9. The adsorption of small amounts of cationic CPC onto the primarily negatively charged surfaces of the particles in the pH range of 7−9 produces strong attraction and flocculation due to hydrophobic interactions. High concentration of surfactant under 0.01 mol/L of salt provides high zeta potential, which produces a high stability.

 

Key words: surfactant; antibacterial glaze; adsorption isotheral; dispersion stability; zeta potential

ISSN 1672-7029
CN 43-1423/U

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