The current greenhouse effect and the "dual-carbon" goal set off a new wave of refrigerant substitution

requiring new refrigerants need to achieve a comprehensive balance between environmental protection

safety and thermal properties. However

there is no perfect alternative refrigerant

such as the low ODP

GWP refrigerants R290

R32

R1234yf

etc.

which have attracted much attention

and most of them have flammability and safety hazards. Finding matching flame retardants with excellent overall performance for these environmentally friendly flammable refrigerants has become one of the important directions of refrigerant substitution research at this stage. This paper summarises the research progress of matching flame retardants for combustible refrigerants in recent years

mainly focusing on different kinds of flame retardants

outlines the evaluation of their flame retardant effects on different combustible work materials

analyses the application prospects and future development trends from the perspectives of flame retardant performance

flame retardant effect

flame retardant mechanism and environmental performance

and gives suggestions for the selection of matching flame retardants for combustible work materials.