油酰二乙醇胺在丙三醇/水混合溶剂中的自组装及流变性能  

Self-assembly and Rheological Properties of N,N-diethanololeamide in Glycerol/Water Cosolvent

作　　者：李嘉明 王丹[1] 冯玉军[1] 殷鸿尧 LI Jiaming;WANG Dan;FENG Yujun;YIN Hongyao(Polymer Research Institute,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学高分子研究所,高分子材料工程国家重点实验室,成都610065

出　　处：《高等学校化学学报》2025年第4期54-59,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:22172108,U22A20395)资助。

摘　　要：两亲分子自组装是创造新材料的重要方法,此前的研究主要聚焦于室温及以上温度,对零下低温环境中的自组装研究较少.本文研究了非离子表面活性剂油酰二乙醇胺在丙三醇/水混合溶剂中的溶解性、体系冰点、组装行为及流变性能,考察了溶剂组成、油酰二乙醇胺含量及温度对组装行为和流变性能的影响.研究发现,油酰二乙醇胺可在丙三醇/水混合溶剂中组装形成层状胶束及层状液晶,这些组装体的形成可显著提升体系的黏度和弹性性能.混合溶剂中丙三醇含量越高,越不利于层状液晶的形成.油酰二乙醇胺含量越高,越有利于层状液晶的形成.当6.0%(质量分数)油酰二乙醇胺溶于丙三醇/水(体积比50∶50)混合溶剂中时,体系的冰点可降低至-33.4℃.温度降低会促进组装、增强体系黏度和弹性性能.对于相同体系,温度越低,越容易形成层状液晶.The self-assembly of amphiphilic molecules is a crucial approach for the development of novel materials.Previous studies have primarily focused on room and above room temperatures,while limited attention has been given to self-assembly at sub-zero temperatures.In this study,the solubility,freezing point,assembly behavior,and rheological properties of the non-ionic surfactant N,N-diethanololeamide in glycerol/water mixed solvent were investigated.The effects of solvent composition,N,N-diethanololeamide concentration,and temperature on assembly behavior and rheological properties were examined.It is observed that N,N-diethanololeamide can form lamellar micelles and lamellar liquid crystals in the glycerol/water mixed solvent,thereby imparting favorable rheological properties to the system.A higher proportion of glycerol in the mixed solvent inhibits the formation of lamellar liquid crystals.Moreover,increasing the concentration of N,N-diethanololeamide promotes the generation of lamellar liquid crystals.By dissolving 6.0%(mass ratio)N,N-diethanololeamide in a glycerol/water(50/50,volume ratio)mixed solvent,it is possible to lower the freezing point of the system to‒33.4℃.Interestingly,decreasing temperature enhances the self-assembly capability and improves rheological properties,and within this system as lower temperatures facilitate easier formation of lamellar liquid crystals.

关 键 词：两亲分子 自组装 零下低温 溶致液晶 

分 类 号：O648[理学—物理化学]