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水和乙二醇-水混合體系中的離子液體-陽離子表面活性劑混合膠束自聚焦-電導法 表面張立法和光譜研究法—
來源：上海謂載 瀏覽 1623 次 發布時間:2021-12-16
4.結論
觀察到，十六烷基-3-甲基咪唑氯化銨（CET+[C10min][Cl]）和純[C10min][Cl]的混合體系中，西三胺的cmc值介于純[C10min][Cl]和CET之間。在混合體系中，cmc值隨著[C10min][Cl]摩爾分數的增加而增加，證實其形成膠束的趨勢小于純表面活性劑分子。cmc值也隨著溶液中DEG體積百分比的增加而增加，這是由于隨著溶劑極性的降低，表面活性劑的疏溶劑性降低。cmc b cmc*、βb 0和（f1和f2）b 1的觀察值清楚地表明了混合物的非理想行為，并且還表明混合膠束中CET和[C10min][Cl]分子之間存在比純組分更強的相互作用。純組分和混合物的ΔGm值均為負值，表明膠束形成是熱力學自發的。ΔGad 0的負值大于ΔGm0的負值表明，在空氣-溶液界面的吸附比在本體溶液中形成膠束更有利。由表面張力法計算的Γmax和Amin值對于確定表面活性劑分子在氣液界面的排列非常有用。Γmax值為我們提供了關于液/氣界面吸附效率的信息，該值隨著溶液中DEG體積百分比的增加而降低。DEG實際上在界面上與混合表面活性劑系統競爭，因此減少了其數量，從而降低了吸附效率。此外，P的值為b0。33，表明形成的膠束/混合膠束本質上是球形的。從紫外-可見光譜可以得出結論，[C10min][Cl]與CET形成混合膠束，這從存在和不存在[C10min][Cl]時的cmc值可以清楚地看出。在cmc以下，大部分離子對形成，但一旦達到cmc，這些離子對就會轉變為[C10min][Cl]/CET混合膠束和可溶性染料分子。
致謝
U.Farooq感謝UGC以BSR（基礎科學研究）的形式提供獎學金，N.A.Malik感謝化學系主任、伊斯蘭教理工大學（IIST）、Awantipora、普拉瑪、J＆K等提供必要的設施。
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