文章摘要
陈骥,胡学一,方云.聚氧丙烯链对延展型表面活性剂的双亲性贡献[J].精细化工,2019,36(8):
聚氧丙烯链对延展型表面活性剂的双亲性贡献
Polypropylene Oxide Spacer Making Contribution to Amphipathicity of Sodium Lauryl Polyoxypropylene Ether Sulfates
投稿时间:2018-12-18  修订日期:2019-03-14
DOI:
中文关键词: 延展型表面活性剂  月桂基聚氧丙烯醚硫酸钠  聚氧丙烯链  双亲性  界面性能
英文关键词: extended surfactant  sodium lauryl polyoxypropylene ether sulfate  polypropylene oxide spacer  amphipathicity  interfacial property
基金项目:国家重点研发计划项目(批准号:2017YFB0308904)资助
作者单位E-mail
陈骥 江南大学 chenji001@yeah.net 
胡学一 江南大学  
方云 江南大学 yunfang@126.com 
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中文摘要:
      以天然月桂醇为原料,采用丙氧基化反应、硫酸酯化反应和中和反应合成了系列月桂基聚氧丙烯醚硫酸钠(SLPpS, p = 3, 6, 9),采用红外和核磁氢谱对其进行了结构表征。考察了SLPpS的表面张力,泡沫,乳化,润湿,去污,临界胶束温度和钙离子抗性等界面和胶束溶液性质,并与两种传统表面活性剂十二烷基硫酸钠(SDS)和月桂基聚氧乙烯醚硫酸钠(SLE3S)对比,突显聚氧丙烯(PPO)链对延展型表面活性剂性质的影响。结果表明:PPO链不仅为SLPpS分子提供疏水贡献,使SLPpS的表面张力降低至32.1 mN/m以下并使其临界胶束浓度低达10-4 mol/L数量级,同时产生了优于SDS和SLE3S的乳化、润湿和去污能力,而且提供弱的极性贡献,产生低于0 ℃的临界胶束温度和高于SDS约30倍的钙离子抗性。SLPpS的优异性质使其适用于个人护理及家用清洁产品中。
英文摘要:
      A series of sodium lauryl polyoxypropylene ether sulfates (SLPpS, p = 3, 6 and 9) were synthesized from natural lauryl alcohol by propoxylation and sulfuric acid esterification followed by neutraliza-tion. The structures of the products were confirmed by FTIR and 1HNMR. Their interfacial and micellar solution properties, such as surface tension, foamability, emulsifying power, wettability, detergency and calcium tolerance were investigated. Compared with two traditional surfactants, sodium dodecyl sulfate (SDS) and sodium lauryl ether sulfate (SLE3S), the effect of polyoxypropylene (PPO) chain on the properties of extended surfactant was discussed. It was found that the PPO chains not only provided lipophilic contribution to the SLPpS molecules, which resulted in the surface tension of SLPpS being as low as 32.1 mN/m and their critical micelle concentrations reaching the order of magnitude of 10-4 mol/L. These SLPpS surfactants exhibited better emulsifying power, wettability and detergency than SDS and SLE3S. The PPO chains but also provided a weak polar contribution to the surfactants, the critical micelle temperature was lower than 0℃ and calcium tolerance was 30 times stronger than that of SDS. Therefore, SLPpS can be used in personal care and household cleaning products.
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