三硅氧烷羧酸钠表面活性剂的合成及性能  

Synthesis and properties of trisiloxane-based carboxylate surfactant

作　　者：余增 陈洪龄 YU Zeng;CHEN Hongling(College of Chemical Engineering,Nanjing Tech University,Nanjing 211800,China)

机构地区：[1]南京工业大学化工学院,江苏南京211800

出　　处：《精细石油化工进展》2024年第2期48-53,共6页Advances in Fine Petrochemicals

摘　　要：采用1,1,1,3,5,5,5-七甲基三硅氧烷(TSO)和丙烯酸乙酯(EA)为原料,通过硅氢加成和酯水解反应,合成一种新型三硅氧烷羧酸盐表面活性剂——七甲基三硅氧烷丙酸钠(TSO-SP)。通过傅里叶变换红外光谱仪(FT-IR)对目标产物进行结构表征,测试了产物的表面张力、泡沫性能、消抑泡性能、乳化性能、接触角和热稳定性能。结果表明:目标产物的临界胶束浓度(CMC)为7.94×10^(-3)mol/L,最低表面张力为26.18 mN/m;2 g/L的TSO-SP溶液的起泡量为2 mL,5 min内稳泡率为25%,TSO-SP对3种起泡液的消抑泡性能由大到小依次为十六烷基三甲基溴化铵(CTAB)、十二烷基苯磺酸钠(SDBS)、烷基糖苷-0814(APG-0814);TSO-SP对玉米油的乳化效果要远优于液体石蜡、二甲基硅油(350 Pa·s)和环己烷;1 g/L的TSO-SP溶液可以润湿固体石蜡表面,平衡接触角为72°;TSO-SP的热解温度为330℃,具有良好的热稳定性。A new trisiloxane-based carboxylate surfactant,sodium heptamethyl trisiloxane propionate(TSO-SP),was synthesized by hydrosilylation and hydrolytic reaction of ester.The main raw materials were 1,1,1,3,5,5,5-heptamethyltrisiloxane(TSO)and ethyl acrylate(EA).The structure of the product was characterized by Fourier transform infrared spectrometer(FT-IR).Moreover,the surface tension,foaming property,defoam-ing property,emulsifying property,contacting angle and thermal stability of the surfactant were tested.Results showed that the critical micelle concentration(CMC)of the surfactant was 7.94×10^(-3)mol/L,and the minimum surface tension was 26.18 mN/m.The foaming volume of TSO-SP was 2 mL at the mass concentration of 2 g/L,and the stability rate of the form was 25%within 5 minutes.Antifoaming effect of TSO-SP from large to small was CTAB,SDBS,APG-0814.The emulsifying effect of TSO-SP on corn oil was much better than that of liq-uid paraffin,dimethicone(350 Pa·s)and cyclohexane.The solution of TSO-SP could wet the surface of solid paraffin wax at the mass concentration of 1 g/L,and the final equilibrium contact angle was 72°.The pyrolysis temperature of TSO-SP was 330°C,which had good thermal stability.

关 键 词：七甲基三硅氧烷丙酸钠 硅氢加成 羧酸盐 表面活性剂 丙烯酸乙酯 

分 类 号：TQ423[化学工程]