2-BTP (2-Bromo-3,3,3-trifluoropropene) is a promising environment-friendly flame retardant showing high effectiveness. Because of the good mutual solubility with polyol ester oil, 2-BTP was selected as a lubricant additive in this work. The flame inhibition performance of lubricating oil with 2-BTP on the combustion of R152a (1,1-difluoroethane) and R1234yf (2,3,3,3-tetrafluoroprop-1-ene) was investigated, which was expected to enhance the safety level of accidental leaks of flammable working fluids. To assess the suppression capability, experiments were conducted using a 12 L spherical flask according to the test method of ASTM E681. The results indicated that the lower flammable limit of R152a was increased from 4.8% to 5.0% in volumetric concentration as the mass fraction of 2-BTP contained in the POE oil was 20%. As to R1234yf, the lower flammable limit was increased from 7.2% to 10.3%, and the upper flammable limit was decreased from 13.0% to 10.3%. Besides, with the addition of 2-BTP, the combustion intensity of R152a and R1234yf was weakened. Both of the flame diameter and duration were reduced. And the maximum flame transient temperature of R152a also had a decrease. The inhibition effect of lubricating oil with 2-BTP on the mildly flammable working fluid R1234yf was much better.

2-BTP（2-Bromo-3,3,3-trifluoropropene）是一种很有前景的高效环保型阻燃剂。由于与多元醇酯油具有良好的互溶性，本研究选用2-BTP作为润滑油添加剂。研究了2-BTP润滑油对R152a（1,1-二氟乙烷）和R1234yf（2,3,3,3-四氟丙烯-1-烯）燃烧的阻燃性能，有望提高安全性易燃工作流体的意外泄漏水平。为了评估抑制能力，根据 ASTM E681 的测试方法，使用 12 L 球形烧瓶进行实验。结果表明，当POE油中2-BTP的质量分数为20%时，R152a的燃烧下限从体积浓度的4.8%提高到5.0%。至于 R1234yf，可燃下限从7.2%提高到10.3%，可燃上限从13.0%降低到10.3%。此外，随着2-BTP的加入，R152a和R1234yf的燃烧强度减弱。火焰直径和持续时间都减少了。并且R152a的最高火焰瞬态温度也有所下降。含2-BTP的润滑油对轻度易燃工质R1234yf的抑制效果要好得多。