共查询到18条相似文献,搜索用时 171 毫秒
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三硅氧烷咪唑离子液体表面活性剂的合成与表面活性 总被引:1,自引:0,他引:1
以氯丙基甲基二甲氧基硅烷和六甲基二硅氧烷为原料,在浓硫酸催化下合成了氯丙基三硅氧烷,再与1-甲基咪唑进行季铵化反应,制备了三硅氧烷咪唑离子液体表面活性剂.用傅里叶红外光谱仪以及氢谱和碳谱核磁共振仪表征了产物的结构;并对其临界胶束浓度(cmc)及表面张力(γ)进行了测定.结果表明,与长链烷基咪唑类离子液体表面活性剂相比,三硅氧烷咪唑离子液体表面活性剂具有更好的表面活性,其cmc为15.5 mmol/L,γcmc为24.0 mN/m. 相似文献
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Ming Zhou Yiping Chen Jiaxi Zou Juncheng Bu 《Journal of surfactants and detergents》2018,21(4):443-453
Sulfonated Gemini surfactants are a relatively new class of anion surfactants, composed of 2 or more sulfonated surfactant monomers connected by a spacer at or near the head groups through a covalent bond. In general, the sulfonated Gemini surfactants show better properties compared to conventional anionic surfactants including better surface activity, a lower critical micelle concentration, enhanced detergency, excellent compatibility with other surfactants, and better solubility in high ionic strength systems. This article reviews the synthesis of the sulfonated Gemini surfactants using different raw materials. Based on the existing information in the literature, new ideas are proposed for the synthesis and application of the sulfonated Gemini surfactants. 相似文献
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哌嗪系列双子表面活性剂的合成 总被引:5,自引:1,他引:4
为了探索哌嗪类双子表面活性剂在三次采油(EOR)、新材料制备及生物技术领域中的应用,合成了两个以哌嗪为基的双子表面活性剂Ⅰ和Ⅴ,一个含有两种阴离子的Bola型表面活性剂Ⅱ和一个大环表面活性剂Ⅲ。表面张力测定结果显示,Ⅰ的临界胶束浓度(CMC)为6.47×10-4mol/L,优于传统的表面活性剂;Ⅴ的CMC为1.17×10-3mol/L,说明连接基团长度一定时,增加疏水链的数目,表面活性降低。Ⅱ和Ⅲ水溶性较好,可应用于生物技术领域或在新材料中作为模板剂。MM2能量最小法计算结果显示,在有限长连接基团中引入较多疏水链的化合物不易合成。用溶剂可接触面积说明了Ⅲ水溶性较好的原因。 相似文献
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综述了松香基功能性表面活性剂的合成和应用研究进展;根据功能性表面活性剂的功能性特征,系统概括了可分解型、可反应型、螯合型、Bola型以及双子型5类松香基功能性表面活性剂的研究状况;并根据合成反应原理和分子结构,从合成方法、反应难易程度、收率、表面活性等方面详细分析归纳了松香基功能性表面活性剂的合成研究现状;根据松香基功能性表面活性剂优异的生物降解、金属螯合、反应活性等功能性性能,总结了其在生物医药、电子信息、功能材料等方面的应用进展;最后对松香基功能性表面活性剂的合成及应用研究趋势进行了展望,指出在合成类型、微观形态等基础研究和功能性性能开发利用领域的研究空白和发展潜力。 相似文献
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Bola型表面活性剂是以一根疏水链连接2个亲水基团构成的两亲化合物.介绍了Bola型表面活性剂分子的结构与性能,概述了Bola型双亲表面活性剂与传统表面活性剂相比的优点及其在液相中形成的囊泡的特征.重点介绍了各种类型的Bola型双亲表面活性剂的主要合成方法及用途.最后对其研究前景作了展望. 相似文献
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Gemini型表面活性剂的合成进展 总被引:19,自引:1,他引:19
综述了Gemini型表面活性剂,包括阴离子型、阳离子型、非离子型、两性型及一些特殊类型Gemini表面活性剂的合成方法研究进展。有参考文献23篇。 相似文献
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Aggregation‐Enhanced Emission of Fluorescent‐Gemini Surfactants with High Photostability for Cell‐Membrane Imaging
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Jinwen Peng Junjie Deng Xuebing Huang Pengfei Sun Weixing Deng 《Journal of surfactants and detergents》2018,21(3):433-440
In situ studies of the aggregation behavior of traditional surfactants at the liquid interface using spectroscopic methods are often significantly affected by the large volume of fluorescent groups, such as pyrene. Fluorescent‐Gemini surfactants provide an ideal solution since the fluorescent block can be designed as a spacer or a tail. In this work, we report the synthesis of a new fluorescent‐Gemini surfactant with a rigid spacer (referred to as 8‐TBT‐8). The aggregation behavior and application in cell‐membrane imaging were investigated. The unique aggregation behavior in an organic solvent and aqueous solution was studied using spectroscopy. UV–vis and photoluminescence spectra of 8‐TBT‐8 revealed that this new fluorescent surfactant forms H aggregates in organic solution to give blue emission, whereas it forms J aggregates in aqueous solution to give green fluorescence under UV light. In addition, the fluorescence intensity of 8‐TBT‐8 increases abruptly at concentrations higher than the critical micellization concentration. Good photostability and a unique structure make the synthesized Gemini surfactant very suitable for membrane imaging. 相似文献