摘要
延展型表面活性剂的吸附增溶特性在日用化学品及药物传送体系中具有应用潜能.研究合成了一种e-表面活性剂十二烷基聚氧丙烯醚-9硫酸钠(C12P9S)并用FTIR和1H NMR表征其结构.测得其表面张力为32 mN·m-1,CMC为0.18 mmol·L-1,饱和吸附量为0.95μmol·m-2以及表面最小分子吸附面积为174?2,因此比十二烷基硫酸钠(SDS)具有更高的表面活性,且因其PPO链而在各种界面上占据更大的分子吸附面积.以微米级Al2O3为吸附剂,通过吸附法分别制备了C12P9S@Al2O3和SDS@Al2O3两种改性吸附剂,测得C12P9S和SDS在Al2O3上的吸附量分别为0.168 mmol·g-1和0.218 mmol·g-1;对化妆品中常用防晒剂阿伏苯宗(Ab)进行吸附增溶对比,结果表明C12P9S@Al2O3上Ab的吸附增溶量达到1223 g·mol-1,显著高于SDS@Al2O3的874 g·mol-1,表明C12P9S分子中PPO链有独特的吸附增溶贡献,因此e-表面活性剂具有在防晒产品中应用的潜能.
Adsolubilization of extended surfactants(e-surfactants)has the potential of being applied in daily chemicals and drug delivery systems.An e-surfactant,sodium dodecyl polyoxypropylene-9 sulfate(C12P9S),was synthesized and characterized by FTIR and 1H NMR.The surface tension(32 mN·m-1),critical micelle concentration(0.18 mmol·L-1),saturated adsorption capacity(0.95μmol·m-2)and the occupied surface area per molecule when approaching saturation adsorptions(174Å2)were measured,which means that C12P9S has higher surface activity than that of sodium dodecyl sulfate(SDS)and it is deduced that C12P9S may occupy larger areas at various interfaces due to the PPO spacer.Two modified adsorbents,C12P9S@Al2O3 and SDS@Al2O3,were prepared with micro-Al2O3 by the adsorption method,and the adsorption capacities of C12P9S and SDS on Al2O3 were 0.168 mmol·g-1 and 0.218 mmol·g-1,respectively.The adsolubilization of avobenzone(Ab),one of the commonly used sunscreen agents in cosmetics,was compared between C12P9S@Al2O3 and SDS@Al2O3,and the adsolubilization capacity of Ab by C12P9S@Al2O3 is1223 g·mol-1 that is greater than 874 g·mol-1by SDS@Al2O3 that by SDS@Al2O3 of 874 g·mol-1,which shows that the PPO spacer of C12P9S has a special contribution to adsolubilization and thus e-surfactants have an application prospect in sunscreen products.
作者
韩璐璐
胡学一
方云
Han Lulu;Hu Xueyi;Fang Yun(School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,Jiangsu Province)
出处
《中国洗涤用品工业》
2020年第7期50-55,共6页
China Cleaning Industry
