邻苯二甲酸单醇酯钠盐的合成及性能研究

Synthesis and Properties of Sodium single-fatty alcohol phthalate ester

摘要:

不同醇与邻苯二甲酸酐反应合成邻苯二甲酸单脂肪醇酯，再用氢氧化钠中和得钠盐。研究了催化剂、醇、原料配比、酯化温度及溶剂等对单酯酯化率的影响，用红外光谱法对产物结构进行表征，测定其泡沫性能和界面性能。确定了最佳酯化条件为：以自制催化剂BN-1作催化剂，二甲苯为溶剂，n(醇):n(酸酐)=1：1.60，酯化温度100℃，酯化时间5h。随着醇碳链增加，产物邻苯二甲酸单醇酯钠盐泡沫能力逐渐降低，但超低界面张力逐渐增强。

Abstract:

Sodium single-fatty alcohol phthalate ester was synthesized with phthalic anhydride and different alcohol under catalyst and then neutralized with sodium hydroxide. The influence of catalyst, alcohol, rate of material, esterification temperature and solvent were investigated, and structure, foam capacity and interface were also studied in the paper. The optimum reaction conditions of esterification condition was catalyst for self-made BN-1, xylene as solvent, n(alcohol):n(phthalic anhydride)=1:1.60, esterification temperature 100℃, esterification time 5h. As the alcohol carbon chain increased, the product of a single phthalate ester sodium salt foam capacity gradually decreased, but the ultra-low interfacial tension increased gradually.