以L-丝氨酸和长链酰氯为原料,合成了3种不同碳链长度(n=8,12,14)的N-酰基-L-丝氨酸.并以1H NMR、ESI-MS和元素分析对3种目标产物进行了表征.采用表面张力法研究了N-酰基-L-丝氨酸钠在298、308、318和328 K时水溶液中的聚集行为,确定了临界胶束浓度(cmc)、临界胶束浓度下的最低表面张力(γcmc)、表面饱和吸附量Γmax.由cmc和温度的关系,应用相分离模型计算了胶束化热力学参数△G°m、△H°m和△S°m.结果表明,△G°m＜0,△H°m的绝对值比-T△S°m绝对值小的多,说明胶束化过程为熵驱动过程,随着温度的升高,胶束化过程是熵-焓补偿的过程.
参考文献
| [1] | Clapes P,Infante M R.Amino Acid-based Surfactants:Enzymatic Synthesis,Properties and Potential Applications[J].Biocatal Biotransform,2002,20(4):215-233. |
| [2] | Morán M C,Pinazo A,Pérez L,et al."Green" Amino Acid-based Surfactants[J].Green Chem,2004,,6:233-240. |
| [3] | Miyagishi S,Asakawa T,Nishida M,et al.Hydrophobicity and Surface Activities of Sodium Salts of N-Dodecanoyl Amino Acids[J].J Colloid Interface Sci,1989,131 (1):68-72. |
| [4] | Infante M R,Pérez L,Morán M C,et al.Biocompatible Surfactants from Renewable Hydrophiles[J].Eur J Lipid Sci Technol,2010,112:110-121. |
| [5] | LI Jing,QIAO Weihong.Progress in Synthesis and Application of Chiral Surfactants[J].China Surf act Deterg Cosmet,2010,40 (2):116-123 (in Chinese).李静,乔卫红.手性表面活性剂合成及应用进展[J].日用化学工业,2010,40(2):116-123. |
| [6] | Karuhakak O,Morim H,Higashimori M,et al.Optical Resolution of Amino Acid Derivatived by Micellar Electro-kinetic-Chromatography with N-Dodecanoyl-L-Serine[J].J Chromatogr A,1994,680(1):317-320. |
| [7] | Shinitzky M,Haimovitz R.Chiral Surfaces in Micelles of Enantiomeric N-Palmitoyl-and N-Stearoylserine[J].J Am Chem Soc,1993,115:12545-12549. |
| [8] | Brito R O,Silva S G,Fernandes R M,et al.Enhanced Interfacial Properties of Novel Amino Acid-Derived Surfactants:Effects of Headgroup Chemistry and of Alkyl Chain Length and Unsaturation[J].Colloids Surf B,2011,1(86):65-70. |
| [9] | Hassanzadeh M,Kambarani M,Tayebi L,et al.Kinetic Study of Sodium Cocoyl Sarcosinate Synthesis and Factors Affecting the Reaction on Bench and Pilot Scales[J].J Surfact Deterg,2012,1:54-58. |
| [10] | BO Fang,WANG Dong,YAN Jie,et al.Investigation of Thermodynamic Properties of Cationic Surfactants Behavior[J].Environ Sci Technol,2010,33(6):15-18(in Chinese).卜芳,王栋,闫杰,等.阳离子表面活性剂聚集行为的热力学研究[J].环境科学与技术,2010,33(6):15-18. |
| [11] | WANG Peiyi,XU Baocai,WANG Jun.Sufactant-Synthesis· Function· Application[M].Beijing:Chemisty Industry Press,2009:153-157(in Chinese).王培义,徐宝财,王军.表面活性剂—合成·性能·应用[M].北京:化学工业出版社,2009:153-157. |
| [12] | ZHAO Guoxi.Physical Chemistry of Surfactant[M].Beijing:Peking University Press,1984:66-70 (in Chinese).赵国玺.表面活性剂物理化学[M].北京:化京大学出版社,1984:66-70. |
| [13] | YU Tao,LI Zhong,DING Wei,et al.Enthalpy-Entropy Compensation of Micellization of Alkyl Aryl Sulfonates in Aqueous Solutions[J].Acta Phys-Chim Sin,2010,26(3):727-734 (in Chinese).于涛,李钟,丁伟,等.系列烷基芳基磺酸盐在水溶液中胶束化的焓-熵补偿现象[J].物理化学学报,2010,26(3):727-734. |
| [14] | ZHAO Weirong,ZHANG Shengyi.Surfactant Chemistry[M].Hefei:Anhui University Press,1997:207-212 (in Chinese).赵维蓉,张胜义.表面活性剂化学[M].合肥:安徽大学出版社,1997:207-212. |
| [15] | DING Wei,LIU Guoyu,YU Tao,et al.Molecular Dynamics Simulations and Free Energy Perturbation Calculations of Alkyl Aryl Sulfonate[J].Acta Phys-Chin Sin,2010,26(3):638-642 (in Chinese).丁伟,刘国宇,于涛,等.烷基芳基磺酸盐的分子动力学模拟与自由能微扰计算[J].物理化学学报,2010,26(3):638-642. |
| [16] | Lee D J.Enthalpy-Entropy Compensation in Ionic Micelle Formation[J].Colloid Polym Sci,1995,6:539-543. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%