利用水热法合成了粒径约6 nm的Ti O2纳米颗粒,将纳米颗粒分散到氢化三联苯导热油中制备出不同体积分数的油基Ti O2纳米流体。研究了纳米流体在不同条件下的热稳定性和黏度,发现所制备的纳米流体在低浓度和密闭条件下具有更高的热稳定性,其黏度受温度影响较大,受浓度影响较小,实验数据和传统的黏度理论模型计算值差别较大。 Ti O2 nanoparticles with a particle size of about 6 nm were synthesized by hydrothermal method. The nano-sized Ti O2 nanofluids with different volume fractions were prepared by dispersing the nanoparticles into HTF. The thermal stability and viscosity of the nanofluids under different conditions were studied. The nanofluids were found to have higher thermal stability under low concentration and confinement conditions. The viscosity of the nanofluids was greatly affected by temperature and less affected by the concentration. Experimental data and the traditional viscosity theory model calculated values ​​vary greatly.