自ラワン抽出成分の分散と凝集

第2報パルプおよび填料への吸着

抄録

Adsorption behavior of white lauan pitch particles on pulp and fillers was investigated. Adsorption of pitch increased linearly with the equilibrium concentration of pitch particles in suspension, indicating that the adsorption isotherm was Langmuir type. Although NaCl or CaCl₂ addition had a minute effect on the pitch adsorption, AlCl₃ or Al₂ (SO₄)₃ exerted a distinctive effect showing the maximum adsorption to be present at the concentration near the equi-potential point of pitch particles. Similar behavior was observed with the addition of cationic polyelectrolytes. These results imply that the adsorption of pitch is controlled more seriously by the surface potential of pitch particles rather than that of pulp. The effect of fillers, such as talc and titanium dioxide was small compared to that of electrolytes.