PAsp/PEBA IPN hydrogel composite membrane was prepared by crosslinking and hydrolysis of polysuccinimide (PSI) with hexamethylene diamine (HDA) as crosslinker.The membranes were characterized by scanning electron microscope (SEM),attenuated total reflectance fouriertransform infrared spectroscopy (ATR-FTIR),and thermogravimetric analysis (TA).The effects of composition on the water-absorbing performance,the water content and the combined form between the absorbed water and PAsp/PEBA IPN were systematically investigated.The introduction of PAsp not only effectively regulated the water content and existence state of PAsp/PEBA IPN,but also improved the mechanical properties of PEBA.The membrane showed the best comprehensive performance at the content of 15% PSI and 3% HDA.The water absorption rate was up to 32.01% and the bound water was 3.19%.The tensile strength and elongation at break of PAsp/PEBA IPN increased 21.80% and 43.42%,respectively,comparing to the the pure PEBA membrane.SEM showed that phase separation occurred in the membrane when the content of PSI was 20%.
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