N,N-二烷基脲衍生物的结构表征及物化性能研究

Study on Characterization and Physicochemical Performance of N,N-dialkyl Ureas

利用元素分析、核磁共振、红外光谱、质谱分析等手段对N,N-二烷基脲衍生物的结构进行了表征,并对化合物的熔点、水中溶解度、表面张力等性能进行了测定.实验结果表明:随着碳链的增加,化合物的熔点和溶解度均依次降低;25℃条件下,N,N-二乙基脲的溶解度为1.15×103g/L;N,N-二丁基脲溶解度仅为10.9 g/L.在降低表面张力性能方面N,N-二丁基脲明显优于N,N-二乙基脲和N,N-二丙基脲.

The N,N-dialkyl ureas were characterized by elemental analysis,1H NMR,IR and GCMS,and their physicochemical performance was measured as well,such as melting point,solubility in water and equilibrium surface tension.The results show that the melting point and the water-solubility of the above compounds decreases with the increase of the alkyl chain length.At the temperature of 25 ℃,the solubility in water of N,N-diethyl urea is 1.15×103 g/L, while that of N,N-dibutyl urea is just 10.9 g/L.On the aspect of pe...