不同结构磺酸盐在农药饱和溶液中泡沫性能的研究

Study on Foam Properties of Sulfonates with Different Structures in Saturated Pesticide Solutions

探究了十二烷基磺酸钠(SDS)、十二烷基苯磺酸钠(LAS)、仲烷基磺酸钠(SAS)及α-烯基磺酸钠(AOS)在农药饱和溶液中的泡沫性能,结果发现:界面性质(表面张力γ,临界胶束浓度CMC及分子面积ACMC)和分子结构与泡沫性能均有关系,高界面活性、直链结构的磺酸盐泡沫性能较好。与在纯水中相比,农药饱和溶液体系的表面张力降低,泡沫高度增加;SDS,LAS和SAS的泡沫稳定性降低,AOS的泡沫稳定性增加。4种表面活性剂中,SAS因具有低泡性,为最佳农药助剂。

The foam properties of sodium dodecyl sulfonate(SDS),sodium dodecyl benzene sulfonate(LAS),sodium secondary alkyl sulfonate(SAS)and sodiumα-alkenyl sulfonate(AOS)in saturated pesticide solutions were explored.The results showed that the interface properties(including surface tensionγ,critical micelle concentration CMC,and molecular area ACMC)and molecular structure were related to foam properties,the sulfonate with high interfacial activity and linear structure hadbetter foam performance.Compared with pure water,the surface tension of the pesticide saturated solution system decreased and the foam height increased,the foam stability of SDS,LAS and SAS decreased,and the foam stability of AOS increased.Among the four surfactants,SAS was the best pesticide additive due to its low foaming properties.