Abstract: Temperature-sensitive hydrogels P(NIPA-co-DiAB) with aromatic group as hydrophobe was were prepared by free radical micellar crosslinking copolymerization with N-isopropyl acrylamide(NIPA) and N,N-dially benzylamine(DiAB) as comonomers,N,N-methylene-bis-acrylamide(BIS) as crosslinker,sodium dodecyl sulfate(SDS) as surfactant and ammonium persulfate(APS)-tetramethylethylenediamine(TMEDA) as initiator system.The influence of DiAB content on the properties of the hydrogels was discussed.In the initial swelling stage,the swelling behavior of the four hydrogels changed from Fickian kinetics to non-Fickian with increasing of molar fraction x(DiAB) from 0 to 3%.While x(DiAB) values were 0,1%,2% and 3%,the equilibrium swelling ratio SR0 of P(NIPA-co-DiAB) hydrogels were 63.6,93.5,141.6 and 167.4 in distilled water;63.1,71.0,59.0 and 77.5 in a 0.01 mol/L SDS solution;37.6,42.2,44.1 and 60.0 in a 0.01mol/L CTAB solution;30.9,49.4,68.5 and 88.3 in a 0.01 mol/L Triton X-100 solution respectively.It was found that the SR0 values of P(NIPA-co-DiAB) hydrogels were greater than that of PNIPA,and the SR0 values of the four hydrogels in distilled water were greater than those in 0.01 mol/L aqueous surfactant solution.The volume phase transition temperature or lower critical swelling temperature(LCST) of PNIPA hydrogel was enhanced from 32.5℃ in distilled water to 35.4℃,45.6℃ or 80℃ in a 0.01 mol/L Triton X-100,CTAB or SDS solution,respectively.The LCST of P(NIPA-co-DiAB) hydrogels was increased from 32.0~32.5℃ in distilled water to 34.7~35.6℃,about 45.8~46.2℃ or 80℃ in a 0.01 mol/L Triton X-100,CTAB or SDS solution,respectively.It was shown that the LCST of P(NIPA-co-DiAB) hydrogels was increased by adding surfactant.The high volume transition temperature was essentially independent of hydrophobic comonomer DiAB content.