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为了将纳米颗粒的强化传热吸收作用应用于氨水吸收制冷中,提出了在氨水溶液中添加铁酸锌纳米颗粒和复配阴/阳离子表面活性剂SDBS和CTAB的纳米流体的配制方法,并对其稳定性进行了实验研究.研究了阴阳离子活性剂质量分数、复配比例及超声分散和光照对稳定性的影响,确定了铁酸锌-氨水纳米流体分散的最佳工艺为:SDBS质量分数为1.5%,CTAB质量分数为0.015%,超声时间为30min,光照时间72h以上.最后根据双电层原理分析了活性剂质量分数对悬浮液稳定性的影响,表明存在最佳活性剂质量分数,并与实验结果相符.
In order to apply the enhanced heat transfer and absorption of nano-particles to the absorption and cooling of ammonia water, the preparation method of nanofluid with zinc ferrite nanoparticles and SDBS and CTAB complexed with anionic / cationic surfactants was proposed. The stability of which was studied experimentally.Analyzed the effects of the mass fraction of anions and cations, the ratio of complexation, the dispersion of ultrasonic and the stability of illumination, the best technology of dispersion of zinc ferrite-ammonia nanofluid was determined as follows: SDBS mass fraction The mass fraction of CTAB was 0.015%, the ultrasonic time was 30min and the illumination time was above 72h.At last, the influence of the active agent mass fraction on the stability of the suspension was analyzed according to the principle of electric double layer, And consistent with the experimental results.