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Effects of alkali and salt on the phase diagram of sodium dodecyl sulfate(SDS, 151-21-3)/ n-amyl alcohol-cyclohexane-water quasi-ternary system

The study of quasi-ternary phase diagram can provide theoretical basis for obtaining microemulsion for preparation of nanomaterials. In this paper, the quasi-ternary phase diagram of sodium dodecyl sulfate(SDS, 151-21-3) / n-amyl alcohol-cyclohexane-water system at 45 ℃ was simulated and verified by conductivity method. The results of conductivity measurement The picture is very good. SDS-n-pentanol-cyclohexane-zinc nitrate aqueous solution and SDS / n-amyl alcohol-cyclohexane-sodium hydroxide were prepared at 45 ° C and 65 ° C, SDS / n-amyl alcohol- (NaOH) and salt (Zn (NO)) on the phase diagram of SDS / n-amyl alcohol-cyclohexane-water quasi-ternary system were studied by comparing the three phase diagrams of the aqueous solution system. influences. The results show that the addition of zinc nitrate and alkali reduces the oil / oil (O / W) and water - in - oil (W / O) regions of SDS / n - amyl - cyclohexane - water ternary phase diagram. At 45 ° C, the O / W region in the quasi-ternary phase diagram of the SDS / n-amyl alcohol-cyclohexane-sodium hydroxide aqueous solution system even disappears; at 65 ° C, the O / W and W / O regions are present, and The W / O and O / W regions of the three phase diagrams have overlapping regions. On the basis of this, the conditions of SDS / n-amyl alcohol-cyclohexane-zinc nitrate aqueous solution and the quaternary ternary solution of SDS(SDS, 151-21-3)/ n-amyl alcohol-cyclohexane-sodium hydroxide aqueous solution were determined. The overlapping area of the W / O region in the phase diagram (area II in each phase diagram). The prepared nano-zinc oxide has a polycrystal structure with an average particle size of 80 nm.

 

 

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