Synthesis and unusual properties of novel alkylbenzene sulfonate gemini surfactants
Synthesis and unusual properties of novel alkylbenzene sulfonate gemini surfactants
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DOI：
10.1016/j.colsurfa.2006.05.013
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发表时间：
2006-11
期刊：
影响因子：
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通讯作者：
Xigang Du;Yao Lu;Ling Li;Jinben Wang;Zhengyu Yang
中科院分区：
文献类型：
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作者：
Xigang Du;Yao Lu;Ling Li;Jinben Wang;Zhengyu Yang
合成了7种新的二烷基二苯二磺酸盐Gemini表面活性剂。测定了它们的表面张力、克拉夫特温度和熔融温度等物理化学性质。研究发现，阴离子Gemini表面活性剂表现出一些反常性质。滴积法测定结果表明，表面活性剂ID，即25℃时的IIb和50℃时的IIb，尽管具有良好的两亲性成分，但几乎没有CMC，也几乎没有降低水的表面张力。随着温度的升高，三种表面活性剂均表现出较强的临界胶束浓度和良好的表面活性。具有两个较长链的表面活性剂IE的临界胶束浓度高于较短链的表面活性剂ID。此外，对于这类阴离子Gemini表面活性剂，间隔基碳数比烷基碳数对其克拉夫特温度和熔融温度的影响更大。
Seven new dialkyldibenzene disulfonate gemini surfactants have been synthesised. The physico-chemical properties such as their surface tensions, krafft temperatures and melting temperatures have been measured. It was found that the anionic gemini surfactants showed some aberrant properties. The results determined by drop-volume method indicated that surfactants Id, Ie at 25°C and IIb at 50°C showed no cmc and lowered surface tension of water hardly despite their seemingly favorable amphiphilic components. However, the three surfactants showed a sharp cmc and good surface activity with the increment of temperature. Surfactant Ie with two longer chains had a higher cmc than that for shorter chain surfactant Id. Furthermore, for this class of anionic gemini surfactants, the spacer carbon number had more important effects than the alkyl chain carbon number on their krafft temperatures and melting temperatures.