水基氧化石墨烯纳米流体表面张力实验研究

以去离子水为基液,以氧化石墨烯纳米粒子为添加剂,制备成水基氧化石墨烯纳米流体,研究纳米流体在不同浓度、温度以及不同纳米粒子粒径下的表面张力,表面张力采用吊环法进行测量。实验结果表明,纳米流体的表面张力随着浓度增大而增大,但相对于去离子水,最大浓度(0.1wt%)的纳米流体表面张力仅增加了2.9%；纳米流体的表面张力随着温度的升高而降低,但降低的幅度小于去离子水随温度的降低幅度；纳米流体的表面张力随着纳米粒子粒径的减小而降低。本文的研究结果可为吸收式制冷循环吸收液的研究提供参考。

Experimental investigation on surface tension of water-basedgraphene oxide nanofluids

Abstract: The water-based graphene oxide nanofluids were prepared. The surface tension of nanofluids with different mass fraction, temperature and different nanoparticle size was researched. The surface tension value was measured through ringmethod. The experimental results shew that the surface tension of nanofluids increased with increasing the mass faction of nanoparticles. But the surface tension of nanofluids with maximum concentration (0.1 wt %) only increased up to 2.9% compared with deionized water. The surface tension of nanofluids decreased with increasing temperature and decreasing nanoparticle size. The results of this paper could provide reference for the research of absorption working medium for absorption refrigeration cycle.