Abstract: Nanofluids preparation methods including vapor deposition，alloying and dispersion and dispersion technologies covering physical dispersion and chemical dispersion were reviewed in the paper. The latest research developments of gas-liquid mass transfer enhancement processes and mechanisms were summarized. The mechanisms of nanofluids enhancing the gas-liquid mass transfer were analyzed in detail，including grazing effect，inhibition of bubble coalescence，mixing of the gas-liquid boundary layer and permeating. Four prospective fields for additional research were proposed in order to obtain a unified theory. These four fields were summarized as below：the mutual effect of influence factors; more systems except NH3/nanofluids，CO2/nanofluids，CO/nanofluids and vapor/nanofluids; concentration distribution and velocity distribution near gas-liquid interface; and interaction of nanoparticles and gas-liquid interface.

Key words: nanofluids, gas-liquid mass transfer enhancement, grazing effect, interface Marangoni convection, diffusion coefficient

摘要： 简要阐述了气相沉积法、共混法和分散法3种纳米流体的制备方法以及物理法、化学法两种纳米流体的分散技术。重点综述了纳米流体强化气液传质过程以及强化机理方面的最新研究成果。分析给出了纳米流体强化气液传质的几点原因：掠过效应、抑制气泡聚并机理、边界层混合机理、渗透机理以及多个影响因素相互关联作用。并预测出可能成为研究热点并有助于统一的强化理论表述提出的4个研究方向：影响纳米颗粒强化气液传质的各种因素相互耦合作用；纳米流体对氨、CO2、CO、O2和水蒸气以外的其它气体的物理化学吸收，进一步提出纳米颗粒强化气液传质普适性模型；搜集纳米颗粒影响气液界面附近的浓度分布；速度分布的微观信息以及纳米颗粒与气液界面相互作用的研究。

关键词: 纳米流体, 强化气液传质, 掠过效应, 微对流, 扩散系数