MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Lignocellulose Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Lignocellulose Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
J Colloid Interface Sci. 2017 Jan 15;486:67-74. doi: 10.1016/j.jcis.2016.09.061. Epub 2016 Sep 28.
A novel anionic rosin-based phosphate diester sodium (DDPDS) was successfully synthesized from raw dehydroabietic acid, a natural raw material, via four-step reactions: acylation, esterification, phosphorylation and neutralization. Nuclear magnetic resonance (C NMR) and Fourier transform infrared spectroscopy (FT-IR) were used to characterize the structure of target products. The aggregation behaviors in aqueous-ethanol solution and surface properties of DDPDS and its mixed systems were investigated by transmission electron microscopy (TEM), automatic tensiometer and contact angle measuring instrument. The results showed that DDPDS had high surface activity, unexpected emulsification and excellent wettability. The critical micelle concentration (CMC) of 1.35g∗L, the minimum surface tension (γ) of 31.75mN∗m, emulsifying power of 153s and the minimum contact angle of 13.4° were determined for DDPDS. Spherical vesicles with diameter about 50nm and 5μm were self-assembled respectively in aqueous-ethanol solution when DDPDS concentration is about 1 CMC and 5 CMC. Two surfactant ionic self-assembly systems were constructed by mixing DDPDS with sodium dodecylbenzenesulfonate (SDBS) and cetyltrimethylammonium bromide (CTAB), which forms 40nm and 20nm spherical micelles in 1 CMC aqueous-ethanol solution. Possible formation mechanisms of surfactant ionic self-assembly systems on a combination of ionic interactions between DDPDS and SDBS or CTAB are discussed. It was found that there were an obvious synergistic effect of foam stability in DDPDS/SDBS mixed system and an obvious synergistic effect of foam capability in DDPDS/CTAB mixed system.
一种新型的阴离子松香基磷酸二酯钠盐（DDPDS），是由天然原料脱氢枞酸经酰化、酯化、磷酸化和中和四步反应合成的。采用核磁共振（C NMR）和傅里叶变换红外光谱（FT-IR）对目标产物的结构进行了表征。利用透射电子显微镜（TEM）、自动张力仪和接触角测量仪研究了 DDPDS 在水-乙醇溶液中的聚集行为及其与混合体系的表面性质。结果表明，DDPDS 具有高表面活性、意外的乳化性和优异的润湿性。DDPDS 的临界胶束浓度（CMC）为 1.35g∗L，最低表面张力（γ）为 31.75mN∗m，乳化力为 153s，最低接触角为 13.4°。当 DDPDS 浓度约为 1CMC 和 5CMC 时，在水-乙醇溶液中分别自组装成直径约为 50nm 和 5μm 的球形囊泡。通过将 DDPDS 与十二烷基苯磺酸钠（SDBS）和十六烷基三甲基溴化铵（CTAB）混合，构建了两种表面活性剂离子自组装体系，在 1CMC 水-乙醇溶液中分别形成 40nm 和 20nm 的球形胶束。讨论了 DDPDS 与 SDBS 或 CTAB 之间的离子相互作用对表面活性剂离子自组装体系形成的可能机制。发现 DDPDS/SDBS 混合体系的泡沫稳定性存在明显的协同效应，DDPDS/CTAB 混合体系的泡沫性能存在明显的协同效应。
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