新型三硅氧烷表面活性剂在低能固体表面的铺展性能研究

以测试表面活性剂溶液在固体表面铺展能力的方法,研究了温度、湿度和外加电解质浓度对新型双尾三硅氧烷表面活性剂1 L溶液在石蜡等低能固体表面的铺展性能的影响,结果表明:测试铺展性能也能大致求出表面活性剂1L的临界润湿浓度(CWC);1L溶液的铺展能力是随着温度和湿度的升高而增强的;较低的外加电解质浓度有助于提高1L溶液的铺展性能。实验说明,表面活性剂1L作为润湿剂或铺展剂使用时可以选择在较高的温度和(或)湿度下使用,以及(或者)通过添加适量的电解质的方法来提升其铺展能力,而且使用的浓度应该要在其CWC以上。

Studies on the Spreading Performance of A Novel Trisiloxane Surfactant Aqueous Solution over Low-energy Solids

By testing the spreading ability （SA） of surfactant aqueous solution over solid substrate, the influences of temperature, relative humidity, the concentration of added electrolyte on the spreading performance of novel double-tail trisiloxane surfactant 1 L solution over low-energy solid substrates （such as Paraffin wax） were investigated. The results showed that the critical aggregation concentration （CAC） of surfactant 1 L could also be obtained roughly by measuring its SA, and that the SA of 1 L solution was improved with the increase of temperature, relative humidity and a lower concentration of added electrolyte. It is suggested that when surfactant 1 L is used as a wetting agent or a spreading agent, the SA of its solution can be improved by using it at a higher temperature and （or） a higher relative humidity, and （or） by adding appropriate amount of electrolyte; more over, its concentration must be over its CWC.