不同结构烷基磺酸钠溶液的表面性质与泡沫性能研究

Surface and Foam Properties of Sodium Alkyl Sulfonate Solutions with Different Structures

磺酸盐类阴离子表面活性剂作为农药助剂,在农药剂型中应用广泛,其泡沫性能对农药制剂性能影响较大。考察了分子结构变化对烷基磺酸钠(SAS)溶液表面张力(γcmc)、亲水亲油平衡(HLB)值等表面性能的影响。同时详细研究了不同碳链长度的烷基磺酸钠的泡沫性能。结果发现,SAS的临界胶束浓度(cmc)、溶液表面张力(γcmc)、标准自由能(ΔGm)、分子面积(Acmc)和HLB随着碳链的增长而降低,起泡性降低而稳泡性增强。

As an agrochemical additive,sulfonate anionic surfactants are widely used in pesticide formulations,and their foam properties have a great influence on the performance of pesticide formulations.In this paper,the effects of molecular structure changes on surface tension(γcmc),hydrophile lipophilic balance(HLB)and other surface properties of alkyl sulfonate solution(SAS)were investigated.Meanwhile,the foam properties of alkyl sulfonate with different carbon chain lengths were studied in detail.The results showed that the cmc,γcmc,ΔGm,Acmc and HLB values of SAS decreased with the increase of carbon chain length,and the foaming ability decreased and the foam stability increased.