内聚能比理论在分散松香胶乳化剂选择中的应用

The Application of Cohesive Energy Ratio Method in the Selection of Rosin Size Emulsifiers

建立了松香和系列壬基酚聚氧乙烯(10)醚琥珀酸低级醇酯磺酸钠(简称ST系列)的乳化体系的内聚能估算模型,计算了乳化体系在0～100℃的内聚能比值(雅)。计算结果表明:在同一温度下,乳化体系的R值随着乳化剂中低级醇的碳链增长而变小;随着温度的升高,R值不断变大;ST-3和ST-4的R值在计算温度范围内跨越了R=1的理想转相点,即理论上对松香具有较高的乳化性能。松香乳化实验表明:除ST-0外,计算值与乳化结果一致。

The cohesive energy model of the emulsification systems of rosin and series surfactants of sodium sulfonate nonylphenol polyoxyethylene（10） succinate ethanol ester （called ST serial） was established. The R-ratio values of the above emulsification systems between 0~2 and 100~C were calculated. The results of calculation showed that under the same temperature, the R-ratio values decreased when the length of carbon chain of the lower-alcohol of the emulsifier increased, the R-ratio values increased with temperature increasing, and only the R-ratio curves of ST-3 and ST-4 crossed the point of phase inversion （R=I）, which indicated that both ST-3 and ST-4 have good emulsifying ability to rosin. The results of rosin emulsifying experiments were in accord with the results of calculation except ST-0.