大豆油微乳液冰浆的制备及其性能研究

Preparation and Properties of Soybean Oil Microemulsion Ice Slurry

冰浆具有良好的储冷和流动换热能力,应用前景广阔。本文选择大豆油作为油相,复配Tween80和AEO-3为表面活性剂,戊醇为助表面活性剂,用Shah法制备了微乳液。实验研究了油相与表面活性剂的质量比、表面活性剂的HLB值、表面活性剂和助表面活性剂的质量比(Km值)对微乳液增溶水量的影响,筛选出了微乳液制备的最佳配比:油相与表面活性剂的质量比为1∶4,Tween80与AEO-3的质量比为6∶4(HLB值为11.6),Km值为2∶1。选择该配比下含水量为50%的微乳液,对其粒径、电导率和稳定性进行了测试分析。利用该微乳液制备了冰浆,研究了冰浆的蓄冰率、表观粘度和循环稳定性。实验结果表明,50%含水量的大豆油微乳液为W/O型微乳液,循环稳定性良好,且制备的微乳液冰浆有较高的蓄冰率和良好的流动性。

Ice slurry has good application prospects owing to its good cold thermal energy storage capacity and flow heat transfer ability.In this study,soybean oil microemulsions were prepared using the Shah method,where soybean oil was used as the oil phase,Tween80 and AEO-3 as surfactants,and amyl alcohol as a cosurfactant.The influence of the mass ratio of the oil phase to the surfactant,HLB value of the surfactant,and mass ratio of surfactant to cosurfactant(Km value) on the water increase in the microemulsion was investigated experimentally.The optimum ratio of the microemulsion was obtained,where the mass ratio of the oil phase to surfactant,the mass ratio of Tween80 to AEO-3,and the Km valuewere 1∶4,6∶4(HLB value 11.6),and 2∶1,respectively.The properties and structure of the microemulsions were analyzed in terms of particle size,electrical conductivity,and stability.Ice slurry was prepared using the microemulsion.The ice storage rate,apparent viscosity,and cycle stability of the ice slurry prepared using the microemulsion were tested and analyzed.The experimental results show that the soybean oil microemulsion with 50% water content is a W/O microemulsion with good stability.The prepared microemulsion ice slurry exhibits a good ice storage rate and fluidity.