Water sorption isotherms of soy protein isolate/carboxymethyl chitosan (SPI/CMCH) blended films was studied by R tanapun The Guggenheim-os Bru (2012) iriyatem nauer-Emmett-Teller (BET) and Anderson-de Boer (GAB) sorp tion model predictions were tested against the experimental data The isotherms showed that the equilibrium moisture content (EMC) of the films increased with increasing CMCH content and the EMC value sharply increased above water activity (aw) 0.55. The BET model was found to be the best-fit model for SPl CMCH blended films at 25 t 1 C. Hemocompatib of CH/SPI composite membranes was improved by heparinization by Wang. Shi, et 2012), It was observed that compared with chitosan/soy protein (Chs) mem branes, heparinized chitosan/soy protein (HChS) membranes showed lower platelet adhesion, longer plasma recalcification (PRT), higher blood anticoagulant index (BCI), significant thromboresistivity and lower hemolysis rate due to the heparinization recent years, great interest has been given to the stud tein-polysaccharide mixtures both in the indu s, The manipulation of the protein polysaccharide