摘要
为进一步研究含表面活性剂环境水相中发生的多过程行为 ,使用NaCl和SDS作为环境水相的模拟组分 ,跟踪了 2 5～ 75℃ (ΔT =5℃ )的温度范围内模型溶液体系中不同温度和不同组分浓度条件下电导率的变化。研究发现 ,各恒定温度条件下 ,模拟溶液体系的电导率与共存盐NaCl的浓度呈现良好的对数关系 ,而电导率κ随温度的变化关系符合 lnk =-ΔERT+B 公式 ,并由此得到了不同温度、不同组分浓度条件下的电导活化能Ea。实验发现Ea与温度无关 ,随SDS浓度变化的规律与电导率随浓度变化的规律一致 ,转折点处对应于相应体系的临界胶束浓度。NaCl浓度对Ea的影响在胶束形成前后表现出明显的不同。在胶束形成之后 ,随NaCl浓度增加 ,体系Ea逐渐降低 ;而在胶束形成之前 ,随环境组分条件的改变而表现出多样的效应。
In order to study the multi-process in environmental aqueous phase including surfactant, NaCl and SDS were selected as model substances to simulate the complex environmental aqueous process. the change of conductivity of model solution at different temperature and different concentration components during the temperature of 25～75 ℃(ΔT=5 ℃) was traced. Observing the conductivity of the model solutions,and their temperature response behavior can be well described by Arrhenius equation. Based on the actual data, the values of conductivity activation energy Ea were also obtained respectively. It was found that Ea curve with the concentration of SDS exited a critical point, which was a well in agreement with cmc of the solution. The Ea affected by the concentration of NaCl, after the micellization point, was found a decreasing way with the increasing in the concentration of NaCl. But, before CMC, Ea changed with the concentration of NaCl much more complicatly, and needed to further study.
出处
《辽宁化工》
CAS
2004年第4期193-197,共5页
Liaoning Chemical Industry
