无机盐对SDS溶液表面张力的影响

Effect of Inorganic Salt on Surface Tension of SDS Solution

通过最大气泡法表面张力的测定,研究了无机盐NaCl、CuCl2、ZnSO4、AlCl3和Al2(SO4)3等对十二烷基硫酸钠(SDS)溶液表面张力的影响。结果表明:在一定浓度范围内,随着无机盐浓度的增大,SDS溶液的表面张力逐渐减小;相同浓度的不同无机盐,价态越高,对SDS溶液表面张力降低越明显,3种无机盐对SDS溶液表面张力影响程度依次为:NaCl<ZnSO4<Al2(SO4)3。

The research on effect of NaCl,CuCl2 ,ZnSO4 ,AlCl3 and Al2 （SO4 ）3 on the surface tension of sodium dodeeyl sulfate （SDS） solution were introduced by the measurement of surface tension using the largest air bubble method. The results showed that as inorganic salt concentration increased the surface tension of SDS solution gradually decreased. In the same concentration of inorganic salt, the higher the Valence State was, the more obviously the surface tension of SDS solution decreased. The influence degree of the surface tension of SDS solution in the three kinds of inorganic salts were in the order of NaCl 〈 ZnSO4 〈 Al2 （ SO4 ） 3.