Synthesis, characterization of PEA-based polyurethaneurea polyurethaneimide and their pervaporation performances to aromatic/aliphatic hydrocarbon mixtures
Polyurethaneurea (PU) and polyurethaneimide (PUI) were successfully synthesized from the same soft segment of poly(ethylene adipate)diol (PEA) and different hard segments via a two-step method. The structures and properties of PU and PUI thus obtained were characterized by means of FT-IR, NMR. The membranes of PU and PUI were prepared by solution casting, and the pervaporation (PV) performances were investigated for separating benzene/cyclohexane mixture. Both PU and PUI membranes showed good permeabilities and selectivities towards benzene. PUI membranes showed lower swelling in benzene/cyclohexane mixtures than PU. And PUI membranes had a specific permeation flux of 15.64kg?μm?m -2 ?h -1 and separation factor of 7.68 for 50wt％ benzene in the benzene/cyclohexane mixture at 40℃. With the feed temperatures increasing, the flux of the PUI membranes was enhanced, but the separation factor was reduced.
polyurethane polyurethane-imide pervaporation aromatic hydrocarbon
Hong Ye Jiding Li Jian Chen Cuixian Chen
Department of Chemical Engineering, Tsinghua University, Beijing 100084 P.R.China
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）