温度对N-月桂酰肌氨酸三乙醇胺反应物结构及性能的影响

Effect of temperature on the structure and properties of N-lauroyl sarcosine triethanolamine reactant

摘要:

N-月桂酰肌氨酸三乙醇胺反应物是性能优异的表面活性剂，具有良好的生物降解性，广泛地应用于日化、金属加工及液压传动介质等行业。重点研究了反应温度、时间对N-月桂酰肌氨酸三乙醇胺反应物结构的影响，通过红外光谱及核磁共振对其结构进行了分析确认。结果表明：低温（75℃）条件下，更容易获得阴离子型表面活性剂（产物A），高温（130℃）条件下，更容易获得非离子型表面活性剂（产物B）。同时，对两种产物的泡沫性能及抗硬水性进行了对比研究发现，当质量浓度小于0.8%时，产物A的表面张力小于产物B的表面张力，且在质量浓度为0.3%时，表面张力均达到最小，此时产物A与产物B的泡沫半衰期分别为22.56min和28.26min。当质量浓度为1.0%时，产物B与产物A相比，其抗硬水能力提升了23.57%，更有利于乳液稳定。通过研究以期为N-月桂酰肌氨酸三乙醇胺的理论研究及实际应用提供参考。

Abstract:

N-lauroyl sarcosine triethanolamine reactant is a surfactant with excellent performance and good biodegradability. It is widely used in daily chemical, metal processing and hydraulic transmission media industries. The effects of reaction temperature and time on the structure of N-lauroyl sarcosine triethanolamine reactant were studied. The structure was confirmed by infrared spectroscopy and nuclear magnetic resonance. The results show that the anionic surfactant (product A) is more easily obtained at low temperature (75℃), and the nonionic surfactant (product B) is more easily obtained under high temperature (130℃). At the same time, the foam properties and hard water resistance of the two products were compared. It was found that when the mass concentration is less than 0.8%, the surface tension of the product A is smaller than the surface tension of the product B. When the mass concentration is 0.3%, the surface tension is the smallest, and the foam half-lives of product A and product B are 22.56 min and 28.26 min, respectively. When the mass concentration is 1.0%, the product B has an improved hard water resistance of 23.57% compared with the product A, which is more favorable for emulsion stability. Through the research to provide a reference for the theoretical research and practical application of N-lauroyl sarcosine triethanolamine.