日用化学工业（中英文）2025，Vol.55Issue(10)：1245-1251,7.DOI:10.3969/j.issn.2097-2806.2025.10.003
单十四烷基磷酸钠的pH可逆响应及回收
Reversible pH response of disodium monotetradecyl phosphate and how to recover it from solutions or emulsions
摘要
Abstract
The aim of this study was to verify whether disodium monoalkyl phosphate was reversibly p H-responsive.In this work,monotetradecyl phosphate(MC14P)was synthesized by pyrophosphoric acid method,and then the disodium salt(MC14P-2Na)and monosodium salt(MC14P-Na)thereof were obtained by neutralizing MC14P with NaOH.The results showed that MC14P-2Na was a precipitation-dissolution switchable surfactant with good reversible pH response.At pH of 11.5,the Krafft temperature(KT)of MC14P-2Na was approximately 0.4℃,and the critical micelle concentration(cmc)was approximately 1.9×10-2 mol/L(at 25℃);at pH of 6.3,MC14P-2Na was changed into the poorly water-soluble MC14P-Na with a KT of approximately 47.9℃and thus poor surface activity and interfacial activity;when pH was cycled between 11.5 and 6.3,corresponding cycles between MC14P-2Na and MC14P-Na were found,without abnormalities for at least 10 cycles.Based on the pH-dependent reversible change between MC14P-2Na and MC14P-Na,MC14P-2Na could be recovered from micellar solutions and emulsions by converting MC14P-2Na to MC14P-Na with average recovery rate of approximately 96.9%and 95.1%,respectively,and the MC14P-Na thus gathered could be converted back to MC14P-2Na by neutralizing with NaOH.关键词
单十四烷基磷酸酯/pH可逆调控/表面活性剂回收Key words
monotetradecyl phosphate/reversible control via pH/surfactant recovery分类
化学化工引用本文复制引用
姚雨,邹欢金,刘雪锋..单十四烷基磷酸钠的pH可逆响应及回收[J].日用化学工业（中英文）,2025,55(10):1245-1251,7.基金项目
国家自然科学基金资助项目(22272062) （22272062）
赞宇科研基金资助项目 （）
