马来海松酸十八酰胺双羧酸钠表面活性剂的制备及其自组装性能研究  

Preparation and Self-assembly Properties of Sodium Maleopimaric Acid Octadecamide Dicarboxylate Surfactant

作　　者：张文静 孙兴燊 翟兆兰 王丹[1] 商士斌[1] 宋湛谦 ZHANG Wenjing;SUN Xingshen;ZHAI Zhaolan;WANG Dan;SHANG Shibin;SONG Zhanqian(Institute of Chemical Industry of Forest Products,CAF,Key Lab.of Biomass Energy and Material,Jiangsu Province,Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Nanjing 210042,China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所、江苏省生物质能源与材料重点实验室、国家林业和草原局林产化学工程重点实验室、林木生物质低碳高效利用国家工程研究中心,江苏南京210042 [2]南京林业大学、江苏省林业资源高效加工利用协同创新中心,江苏南京210037

出　　处：《林产化学与工业》2024年第4期51-60,共10页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(32001268)。

摘　　要：以松香为原料经D-A加成、酰胺化和酸碱中和反应,合成了马来海松酸十八酰胺双羧酸钠(C_(18)MPA2Na),并利用FT-IR、^(1)H NMR、质谱确证了结构。采用表面张力法和尼罗红(NR)荧光探针法研究了C_(18)MPA2Na的表面活性,其临界胶束浓度(cmc)为0.29 mmol/L,达到cmc时的表面张力值(γcmc)为41.11 mN/m,具有良好的表面活性。将C_(18)MPA2Na与十六烷基三甲基溴化铵(CTAB)复配,成功制备了一类黏弹溶液,采用原位冷冻电镜(Cryo-TEM)和流变性能测试研究了复配体系的微观结构和流变行为,结果表明黏弹溶液的聚集体为蠕虫胶束。固定复配体系中CTAB的浓度为80 mmol/L,零剪切黏度(η0)随C_(18)MPA2Na浓度的增加先增加后降低,C_(18)MPA2Na为15 mmol/L时,η0最大值为5.67×10^(4)mPa·s;固定复配体系中C_(18)MPA2Na与CTAB的比例(3∶16),η0随复配体系中C_(18)MPA2Na和CTAB总浓度的增加,表现出先快速升高后趋于平稳的趋势,η0与浓度的幂指数值为11.7;当C_(18)MPA2Na为15 mmol/L,CTAB浓度为80 mmol/L时,随着pH值的降低,η0先增加后降低,且在pH值为7.13时η0值最大,为7.67×10^(4)mPa·s。该研究表明松香的刚性骨架能够促进表面活性剂自组装。Sodium maleopimaric acid octadecamide dicarboxylate(C_(18)MPA2Na)was synthesized from rosin by D-A addition,amidation and acid-base neutralization reactions.The structure was characterized by FT-IR,^(1)H NMR and mass spectrometry.Surface tension method and Nile red(NR)fluorescence probe method were used to study the surface activity of C_(18)MPA2Na.The critical micelle concentration(cmc)of C_(18)MPa2Na was 0.29 mmol/L,the surface tension value at cmc(γcmc)was 41.11 mN/m,and it showed good surface activity.A viscoelastic solutions were successfully prepared by combining C_(18)MPA2Na with cetyltrimethyl ammonium bromide(CTAB).The microstructure and rheological behavior of the composite system were studied by in situ cryo-electron microscopy(Cryo-TEM)and rheology.The results showed that the aggregates of the C_(18)MPA2Na/CTAB viscoelastic solutions were wormlike micelles.When the CTAB concentration in the complex system was fixed at 80 mmol/L,the zero-shear viscosity(η0)first increased and then decreased with the increase of C_(18)MPA2Na concentration.The maximum value ofη0 was 5.67×104 mPa·s at the C_(18)MPA2Na concentration of 15 mmol/L.When the ratio of C_(18)MPA2Na to CTAB(3∶16)was fixed,η0 showed a trend of rapid increase and then tended to be constant with the increase of C_(18)MPA2Na and CTAB concentrations in the mixed system.The power index value ofη0 to concentration was 11.7.At C_(18)MPA2Na concentration of 15 mmol/L and CTAB concentration of 80 mmol/L,with the decrease of pH values,η0 increased first and then decreased,and reached the maximum value(7.67×104mPa·s)at the pH of 7.13.This study demonstrated that the rigid skeleton of rosin could promote the self-assembly of surfactants.

关 键 词：松香 表面活性剂 黏弹溶液 蠕虫状胶束 

分 类 号：TQ35[化学工程] TQ423