丙烯酰胺反相微乳液稳定性影响因素的研究

使用复配乳化剂,以液态烷烃为连续相,丙烯酰胺溶液为分散相制备均匀的油包水(W/O)型微乳液。通过测定体系电导率及观察稳定性,以水相的最大增溶度为指标,研究了连续相的种类、乳化剂复配、丙烯酰胺(AM)单体浓度、电解质浓度对微乳液体系稳定性的影响。结果表明:以异构烷烃Isopar M为连续相,乳化剂Span80/OP-10复配且当复配乳化剂中Span80含量占80%时,体系对水相增溶量最大;提高AM浓度、加入适量电解质Na Ac,都会增强微乳液的稳定性;电解质的加入还会提高乳化剂的最佳HLB值。

Study on Influence Factors of the Stability of Inverse Microemulsion of ACRYLAMIDE

Water-in-oil(W/O) microemulsion was prepared by using the composite emulsifier and taking liquid alkanes as the continuous phase, acrylamide aqueous solution as the disperse phase. Then, for the purpose of obtaining the maximum solved water phase, the influences of such factors as type of continuous phase, emulsifier composition, concentration of acrylamide monomer and salinity on the microemulsion stability were investigated by means of visual inspection and conductivity measurement. The optimum conditions for preparing the microemulsion were finally obtained. Experimental results show that, when the Isopar M is used as continuous phase,Span80/OP-10 is used as composite emulsifier and moreover the mass fraction of Span80 in the composite emulsifier is 80%, the system can obtain the maximum solved water phase. And that,with the increasing of the concentration of acrylamide and adding proper amount of electrolytes NaAc, the stability of the microemulsion can be improved. In addition,the optimum HLB value of emulsifier is also improved by the addition of electrolytes.