四硅氧烷Gemini咪唑表面活性剂的合成及表面性能  

Synthesis and Surface Properties of Siloxane Gemini Imidazolium Surfactant

作　　者：梁维平[1] 赵晓辉[1] 安东[1] 徐乾[1] 叶志文[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《高等学校化学学报》2015年第10期2009-2015,共7页Chemical Journal of Chinese Universities

基　　金：江苏省'六大人才高峰'项目(批准号:JNHB-001)资助~~

摘　　要：以三甲基氯硅烷、γ-氯丙基三氯硅烷、1,4-二氯丁烷和咪唑等为原料合成了一种新型的四硅氧烷Gemini咪唑表面活性剂（[Si4-4-Si4im]Cl2）,通过质谱（MS）和核磁共振氢谱（1H NMR）证明所得产物为目标产物.通过Wilhelmy板法测得其在25℃下的临界胶束浓度（cmc）为0.54 mmol/L,水溶液的表面张力（γcmc）降至18.6 m N/m.通过电导率法研究了其胶束形成热力学参数（ΔGm,ΔHm和ΔSm）,表明在15-35℃下其胶束化过程是自发进行的,且为熵驱动过程.A new siloxane gemini imidazolium surfactant 3,3＇-di[γ-tri（ trimethylsiloxy） silyl]propylchloride-1,1＇-（ 1,4-butanediyl）-bisimidazole（ [Si4-4-Si4im] Cl2） was synthesized with chlorotrimethylsilane,γ-chloropropyltrichlorosilane,1,4-dichlorobutane and imidazole. The structure of the surfactant was characterized by MS and1 H NMR spectra,and the results proved that it was consistent with the target structure. The surface tension of the surfactant was measured by Wilhelmy measuring plate method at 25 ℃. It indicates that the γcmcof the surfactant in aqueous solution can be reduced to 18. 6 m N / m and the value of cmc is0. 54 mmol / L. The thermodynamic parameters of micellization（ ΔGm,ΔHm,ΔSm^） of the surfactant were researched by determination of the electrical conductivity in different concentrations. The results suggest that the process of micellization is spontaneous and micellization of [Si4-4-Si4im]Cl2is entropydriven at15—35 ℃.

关 键 词：四硅氧烷Gemini咪唑表面活性剂 临界胶束浓度 电导率 表面张力 热力学参数 

分 类 号：O647.2[理学—物理化学]