In　this　work,　zeolitic　imidazolate　framework-8　(ZIF-8)　particles　were　synthesized　in　situ　within　polydimethylsiloxane　(PDMS)　membranes　via　a　liquid-liquid　interface.　The　simultaneous　formation　of　ZIF-8　particles　and　crosslinking　of　PDMS　at　the　liquid-liquid　interface　led　to　(1)　reduced　ZIF-8　particle　sizes　(average　130　nm),　(2)　improved　compatibility,　and　(3)　a　protective　PDMS　layer　covering　the　ZIF-8　particles.　Microscopy　and　spectroscopy　confirmed　the　optimal　integration　of　in-situ　grown　ZIF-8　within　the　PDMS　matrix.　The　resulting　in-　situ　ZIF-8/PDMS　membrane　exhibited　excellent　pervaporation　performance,　achieving　a　high　flux　of　2.6　kg　&　sdot;m-　2　&　sdot;h-1　and　a　separation　factor　of　13.1　for　a　5　wt%　ethanol/water　mixture.　Importantly,　the　PDMS　layer　prevented　direct　contact　between　ZIF-8　and　the　feed,　maintaining　superior　performance　over　100　h.　The　in-situ　growth　approach　via　liquid-liquid　interface　showed　great　potential　for　enhanced　ethanol　recovery.