可分解型磺酸盐阴离子表面活性剂的分解性能研究

Cleavage Properties of Sodium 3-[(2-Alkyl-1,3-dioxolan-4-yl)-methoxyl]-1-propanesulfonates

用气相色谱对系列含 1,3 二氧杂环戊烷基团的可分解磺酸盐阴离子表面活性剂〔3 (2 烷基 1,3 二氧杂 4 环戊基甲氧基 )丙磺酸钠 ,烷基 =庚基 (HDMPS) ,壬基 (NDMPS) ,十一碳烷基(UDMPS)〕在 2 5℃c(HCl) =0 1mol/L水溶液中的分解反应进行了研究 ,结果表明该分解反应为准一级反应 ,三者的速率常数k和半衰期t1/ 2 分别为 :(1)k/h-1:1 0 87、0 838、0 714;(2 )t1/ 2 /h :0 6 38、0 82 7、0 936。

The cleavage properties of sodium 3-[(2-alkyl-1,3-dioxolan-4-yl)methoxyl]-1-propanesulfonates[alkyl = heptyl (HDMPS), nonyl (NDMPS), undecyl (UDMPS)] in 0.1 mol/L HCl solution (25°C) were measured by gas chromatography. The kinetics investigation showed that the cleavage reaction of these surfactants is pseudo-first-order. Their rate constant k and half-life t1/2 were obtained as below: (1) k (h-1): HDMPS 1.087, NDMPS 0.838, UDMPS 0.714.(2)t1/2(h): HDMPS 0.638, NDMPS 0.827, UDMPS 0.936.