A　series　of　3-[2-(2-aminoethylamino)　ethylamino]　propyl-trimethoxysilane　(PAPTS)　grafted　on　Materials　of　Institute　Lavoisier-101(Cr)　[MIL-101(Cr)]　porous　adsorbent　with　varied　PAPTS　loadings　were　synthesized　and　characterized　by　powder　X-ray　diffraction　patterns　(PXRD),　N-2　adsorption-desorption　measurement　at　77　K,　Fourier　transform　infrared　spectroscopy　(FTIR),　and　thermal　gravimetric　analysis　(TGA).　The　water　vapor　adsorption　isotherms　were　obtained　by　gravimetric　method.　Water　adsorption　isotherms　and　dynamic　on　MIL-101　as　well　as　PAPTS-MIL-101(Cr)　are　discussed　simultaneously.　Results　indicated　that　even　though　the　Brunauer-Emmett-Teller　(BET)　surface　areas　of　PAPTS-MIL-101(Cr)-0.5　and　PAPTS-MIL-　101(Cr)-0.75　were　reduced　by　approximately　50%　compared　with　that　of　the　original　MIL-101(Cr),　which　have　slightly　higher　water　uptake　capacities　in　a　region　of　0.30　＜　P/P-0　＜　0.40.　The　reduction　in　the　BET　surface　area　is　offset　by　increasing　hydrophilicity　for　the　adsorption　of　water.　PAPTS-MIL-101　(Cr)-0.5　exhibited　very　fast　adsorption　rate,　and　the　adsorption　rate　constants　of　water　vapor　were　0.0206　and　0.202　min(-1)　for　the　initial　and　final　stages　of　the　adsorption　process,　respectively.　Therefore,　these　superior　water　vapor　adsorption　performances　of　PAPTS　grafted　on　MIL-101(Cr)　have　great　potential　for　application　in　adsorption　heat　pumps.　(C)　2017　Elsevier　B.V.　All　rights　reserved.