高等学校化学学报

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氧化铝-延展型表面活性剂的吸附胶束及其吸附增溶

胡学一, 韩璐璐, 方云(), 夏咏梅   

  1. 江南大学化学与材料工程学院, 合成与生物胶体教育部重点实验室, 无锡 214122
  • 收稿日期:2020-07-06
  • 通讯作者: 方云 E-mail:yunfang@126.com
  • 基金资助:
    国家重点研发计划项目(2017YFB0308904)

Admicelles and Adsolubilization of Extended Surfactants on Alumina

HU Xueyi, HAN Lulu, FANG Yun(), XIA Yongmei   

  1. Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China
  • Received:2020-07-06
  • Contact: FANG Yun E-mail:yunfang@126.com
  • Supported by:
    ? Supported by the National Key Research and Development Program of China(2017YFB0308904)

摘要:

合成了一系列直链烷基聚氧丙烯醚硫酸钠(CcPpS, c=8或16时, p=9;c=12时, p=3, 6或9)并鉴定了其结构. 与十二烷基硫酸钠(SDS)类似, C12P9S在氧化铝上的饱和吸附量以及对阳离子染料亚甲基蓝的吸附增溶行为共同证实该延展型表面活性剂在表面上形成了双层吸附胶束, 但由聚氧丙烯(PPO)连接基导致的橄榄球状分子及其导致的较大分子吸附面积, 使其吸附能力及其对亚甲基蓝的吸附增溶能力均稍弱于SDS. C12P9S@Al2O3对弱极性分子1-苯乙醇和难溶性分子苯乙烯的吸附增溶能力均明显强于SDS, 而且对1-苯乙醇的吸附增溶量达到SDS@Al2O3的8.5倍, 说明1-苯乙醇主要被增溶在C12P9S双层吸附胶束中PPO连接基所在的膨大部位, 这使延展型表面活性剂改性的氧化铝在废水处理和药物传递系统等领域具有潜在的应用前景.

关键词: 延展型表面活性剂, 氧化铝, 吸附, 双层吸附胶束, 吸附增溶

Abstract:

A series of sodium linear alkyl polyoxypropylene ether sulfates(CcPpS, c=8 or 16, p=9; c=12, p=3, 6 or 9) was synthesized and structurally identified to investigate the formation of admicelles of extended surfactants on alumina and the related adsolubilization. The formation of bilayer admicelles of C12P9S on alumina was identified by the adsolubilization result of cationic dye MB in comparison with SDS, but the adsorption capacity of C12P9S and adsolubilization capacity of MB were both less than SDS for its rugby-shaped molecule caused by PPO spacer. On the contrary, C12P9S@Al2O3 showed stronger adsolubilization capacities of weak polar PA molecules and water-insoluble ST molecules than those of SDS evidently. Moreover, the adsolubilization capacity of PA by C12P9S@Al2O3 was 8.5 times of SDS@Al2O3, which means that PA molecules were adsolubilized as expected in the swollen PPO domains in bilayer admicelles of C12P9S on alumina, and makes extended surfactant modified alumina potential application prospects in some fields such as wastewater treatment and drug delivery systems.

Key words: Extended surfactant, Alumina, Adsorption, Bilayer admicelle, Adsolubilization

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