含无机盐和尿素的直链烷基苯磺酸钠浓溶液的粘度性质

含无机盐和尿素的直链烷基苯磺酸钠浓溶液的粘度性质王镜和（汕头大学化学系，汕头，５１５０６３）关键词无机盐，尿素，直链烷基苯磺酸钠，粘度性质低切速下的粘度是洗涤液的重要技术指标。常见此类制品是直链烷基苯磺酸钠（ＳＬＡＢＳ）浓溶液，通常以无机盐为增粘剂，...

Viscosity Behavior of Sodium Linear Alkyl Benzenesulfonate Solution with High Concentration Containing Inorganic Salts and Urea

The thickening efficiency of inorganic salt is remarkable and has a maximum viscosity value for concentrated sodium straight-chain alkyl benzenesulfonate(SLABS) solution.The maximum viscosity values which various salts can reach are markedly different.The interaction between salt and micelle solution is mainly the electrostatic effects.The thickening ability of salt is limited by the activity product between the hydrated individual ion(of surfactant) and the metal ion of salt.Urea diminishes markedly the viscosity values of concentrated SLABS solutions.When using(1/2) Na2SO4 as a thickening agent,the higher the concentrations of urea are,the lower the maximum viscosity values are and the higher the concentrations of salt corresponding to the values.These are interpreted in term of forming the individual of partial urea adduct between urea and the hydrated individual,and diminishing SLABS actual concentration of the equilibria between the hydrated individual and micelle.