摘要
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.
The adsorption of cetylpyridinium chloride(CPC) onto a ceramic glaze mixturecomposed of limestone, feldspar, quartz, kaolin, and antibacterial agent was studied. Bothadsorption isothermals and the average particle zeta potential were investigated in order tounderstand the suspension stability as a function of pH, ionic strength, and surfactantconcentration. The results show that under the optimal conditions such as pH value of 7 or 9, 0.01mol/L of ionic strength and around critical micelle concentration(CMC) of surfactant, antibacterialceramic glaze acquires fine dispersion stability. The adsorption of CPC on ceramic glaze particlesis in accordance with Langmuir model in 0.01 mol/L at pH=7 and pH=9. The adsorption of small amountsof cationic CPC onto the primarily negatively charged surfaces of the particles in the pH range of7-9 produces strong attraction and flocculation due to hydrophobic interactions. High concentrationof surfactant under 0.01 mol/L of salt provides high zeta potential, which produces a highstability.
基金
Project(04GK2007) supported by Industrial Key Project of Science and Technology of Hunan Province,China
