Abstract Inverse gas chromatography (IGC) was used as a tool to evaluate the surface parameters of three poly(1-alkyl-3-vinylimidazolium hexafluorophosphate) (P[CnVIM][PF6], n = 2, 4, 6) materials that were obtained by a free-radical polymerization. IGC characterization was carried out at temperatures ranging between 303.15 and 343.15 K for determining the dispersive free energy ( γ s d ) as well as the Lewis acidity and basicity parameters of the three materials. The retention behaviour of the probes on the surfaces of the three materials was analysed by plotting the net retention volumes (Vn) of the probes as a function of temperature. The dispersive free energy results revealed that all three materials have high γ s d values and that the γ s d value decreases in an almost linear fashion with increasing temperature. The acid-base data for the three materials confirmed that the surfaces of all three materials can be considered to be amphoteric with a predominantly basic character and that the basicity decreases with increasing alkyl side chain length on the imidazolium backbone.

中文翻译：

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用反气相色谱法评价聚（离子液体）材料的表面性能

摘要 逆气相色谱 (IGC) 被用作评估三种聚（1-烷基-3-乙烯基咪唑鎓六氟磷酸盐）（P[CnVIM][PF6]，n = 2, 4, 6）材料的表面参数的工具，这些材料是通过自由基聚合获得。IGC 表征在 303.15 和 343.15 K 之间的温度范围内进行，以确定三种材料的分散自由能 (γsd) 以及路易斯酸度和碱度参数。通过绘制探针的净保留体积 (Vn) 作为温度的函数来分析探针在三种材料表面上的保留行为。色散自由能结果表明，所有三种材料都具有高 γ sd 值，并且 γ sd 值随着温度的升高几乎呈线性下降。