十二烷基苯磺酸钠表面张力的研究

Study on Surface Tension of Sodium Dodecyl Benzene Sulfonate

通过表面张力的测定,研究了浓度、温度对溶液表面张力的影响,同时考察无机盐浓度对溶液表面张力的影响。结果表明:十二烷基苯磺酸钠溶液表面张力随浓度的增加、温度的升高和无机盐浓度逐渐的增大而降低,最终确定其CMC值为1.47×10-3mol/L,由于键能和水合离子半径的原因,NaCl对十二烷基苯磺酸钠表面张力的影响明显于KCl。

Through the determination of surface tension,effect of concentration and temperature on the surface tension of solution was investigated as well as influence of inorganic salt concentration on the surface tension.The results show that with the increase of sodium dodecyl benzene sulfonate concentration,temperature and additive inorganic salt concentration,the surface tension of sodium dodecyl benzene sulfonate solution decreases,and its CMC value is 1.47×10-3 mol/L.Due to reasons of bond energy and hydration ion radius,NaCl has more significant effect on the surface tension of sodium dodecyl benzene sulfonate solution than KCl.