植物叶面铺展剂复配规律V.SDS和AE09混合水溶液体相和表面层行为

Synergism regularity of plant leaf spreader V. Bulk and surface behavior in SDS and AEO9 mixed surfactants aqueous solution

SDS/AEO9复配体系的体相与表面层行为的研究结果表明,混合溶液胶束生成、表面张力降低效果均较单一 SDS 组分溶液有较大程度改善,表面张力降低能力在 AEO9体相摩尔分数为0.25时出现增效作用.利用 Rubingh 理论计算了混合胶束和表面层相互作用参数及各组分相对组成比例,结合计算结果初步解释了实验现象.

The bulk and surface behavior of binary mixtures aqueous solution of surfactant SDS and AEO9 have been investigated.The experimental results displayed greatly enhanced surface activity when a few AEO9 was added into SDS aqueous solution.There existed a maximum synergism in the effectiveness of surface tension re- duction in mixtures aqueous solution at x_(AEO9)=0.25.The interaction parameters calculated according to the regu- lar solution theory indicated that the interaction between SDS and AEO9 is in existence both on air/solution sur- face layer and in micelle of mixtures.This synergism effect between SDS and AEO9 is interpreted as the result of the hydrophobic interaction between the hydrocarbon tails of surfactants and week electrostatic attraction be- tween the polar head-group of SDS and the ether oxigen atom of polyethylene oxide units of AEO9.