A　novel　hydrophilic　nanocomposite　additive　(TiO2-g-PNIPAAm)　was　synthesized　by　the　surface　modification　of　titanium　dioxide　(TiO2)　with　N-isopropylacrylamide　(NIPAAm)　via　＂graft-from＂　technique.　And　the　nanocomposite　membrane　of　poly(vinylidene　fluoride)　(PVDF)/TiO2-g-PNIPAAm　was　fabricated　by　wet　phase　inversion.　The　graft　degree　was　obtained　by　thermo-gravimetric　analysis　(TGA).　Fourier　transform　infrared　attenuated　reflection　spectroscopy　(FTIR-ATR)　and　X-ray　photoelectronic　spectroscopy　(XPS)　characterization　results　suggested　that　TiO2-g-PNIPAAm　nanoparticles　segregated　on　membrane　surface　during　the　phase　separation　process.　Scanning　electron　microscopy　(SEM)　was　conducted　to　investigate　the　surface　and　cross-section　of　the　modified　membranes.　The　water　contact　angle　measurements　confirmed　that　TiO2-g-PNIPAAm　nanoparticles　endowed　PVDF　membranes　better　hydrophlilicity　and　thermo-responsive　properties　compared　with　those　of　the　pristine　PVDF　membrane.　The　water　contact　angle　decreased　from　92.8A　degrees　of　the　PVDF　membrane　to　61.2A　degrees　of　the　nanocompostie　membrane.　Bovine　serum　albumin　(BSA)　static　and　dynamic　adsorption　experiments　suggested　that　excellent　antifouling　properties　of　membranes　was　acquired　after　adding　TiO2-g-PNIPAAm.　The　maximum　BSA　adsorption　at　40　A　degrees　C　was　about　3　times　than　that　at　23　A　degrees　C.　The　permeation　experiments　indicated　the　water　flux　recover　ratio　and　BSA　rejection　ratio　were　improved　at　different　temperatures.