关键词: 毒死蜱, 晶相结构, 溶致液晶

Abstract: Effects of organic solvents, temperature, n-alcohols and inorganic salt on the formation of the liquid crystal phase were investigated to discuss the formation law of the liquid crystal system loading chlorphyrifos. The results showed that the substituent in the phenyl ring was advantageous to the formation and maintenance of the liquid crystal phase. A high temperature could cause the system water content to rise when the liquid crystalline phase formed and vanished. With an increase of the chain length of n-alcohols, the minimum water content for the liquid crystal formation slowly increased. When the liquid crystal phase vanished, the maximum water content first rose and then dropped. It was found that, by adding inorganic salt, the maximum water content needed for the disappearance of the liquid crystal phase decreased with hydrated radius of positive ions decreasing, which showed that the liquid crystal structure was unstable.

Key words: crystal phase structure, lyotropic liquid crystal, chlorpyrifos