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以质量分数为0.05%的氧化石墨烯纳米流体为实验对象,测量了不同超声分散时间下氧化石墨烯纳米流体的粒度和Zeta电位分布。同时测定了降温过程中氧化石墨烯纳米流体的过冷度和相变时间,探讨了超声时间对氧化石墨烯纳米流体分散性和过冷特性的影响。实验结果表明,超声分散时间越长,分散性能越好,但在150min后,粒径和Zeta电位大小趋于稳定;且超声分散时间为150min时,过冷度较小,相变时间较短,分别为5.2℃和4870s。
Graphene oxide nanofluids with mass fraction of 0.05% were used as experimental objects to measure the particle size and Zeta potential distribution of graphene oxide nanofluids under different ultrasonic dispersion time. The undercooling and phase transformation time of graphene oxide nanofluids during cooling were also measured. The effects of ultrasonic time on the dispersion and supercooling properties of graphene oxide nanofluids were also discussed. The experimental results show that the longer the dispersion time is, the better dispersion is. However, after 150min, the particle size and Zeta potential tend to be stable. When the ultrasonic dispersion time is 150min, the undercooling is small and the phase transition time is short, Respectively 5.2 ℃ and 4870s.