为通过表面活性剂抑制纳米制冷剂中的颗粒团聚,需要了解不同种类和浓度的表面活性剂对纳米制冷剂颗粒团聚的影响。本文采用动态光散射技术测量纳米制冷剂中的颗粒尺度,来定量分析纳米制冷剂的颗粒团聚特性;实验所用纳米制冷剂为TiO_2-R141b;表面活性剂种类包括SDBS(阳离子型)、CTAB(阴离子型)和NP-10(非离子型)。实验结果表明,SDBS、CTAB和NP-10均可降低纳米制冷剂的颗粒尺度,即抑制纳米制冷剂中的颗粒团聚。对SBDS、CTAB和NP-10,当其浓度分别为400 mg·L~(-1)、200 mg·L~(-1)和300mg·L~(-1)时纳米制冷剂的颗粒尺度最小,最小值分别是未加表面活性剂时的58.4%、56.9%和38.0%。 In order to suppress the agglomeration of the particles in the nanocarbon refrigerant by the surfactant, it is necessary to know the influence of different kinds and concentrations of surfactant on the agglomeration of the nanocarbon refrigerant particles. In this paper, the particle size of nano-refrigerants was measured by dynamic light scattering to quantitatively analyze the particle agglomeration characteristics of nano-sized refrigerants. The nano-sized refrigerants used in the experiments were TiO_2-R141b. The surfactant types included SDBS (cationic), CTAB Type) and NP-10 (non-ionic). The experimental results show that SDBS, CTAB and NP-10 can both reduce the particle size of nano-sized refrigerants, that is, inhibit the particle agglomeration in the nano-sized refrigerants. For SBDS, CTAB and NP-10, the particle size of nanometer refrigerant was the lowest when the concentration was 400 mg · L -1, 200 mg · L -1 and 300 mg · L -1, respectively , Respectively, the minimum values ​​were 58.4%, 56.9% and 38.0%, respectively, in the absence of surfactant.