十八烷基甜菜碱的界面张力随着活性剂浓度和矿化度的增加先降低后升高。
The IFT of octadecyl betaine increase before decrease with the increase of the surfactant concentration and salinity.
十四烷基羧基甜菜碱和十六烷基甜菜碱的界面张力随着活性剂浓度的升高而升高，增加矿化度有利于降低油水界面张力；
The IFT for tetradecyl betaine and hexadecyl betaine increases with the increase of surfactant concentration. The increase for salinity is favor for decrease the IFT.
十四烷基羧基甜菜碱和十六烷基甜菜碱的界面张力随着活性剂浓度的升高而升高，增加矿化度有利于降低油水界面张力；
The IFT for tetradecyl betaine and hexadecyl betaine increases with the increase of surfactant concentration. The increase for salinity is favor for decrease the IFT.
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