Wettability modification of rock cores by fluorinated copolymer emulsion for the enhancement of gas and oil recovery

► The fluorinated copolymer emulsion was successfully fabricated by emulsion polymerization. ► The fluorine side chains of the fluorinated copolymer predominantly moved to the air-polymer interface. ► The prepared copolymer emulsion could alter the wettability of reservoirs rock from strong liquid-wetting to gas-wetting.