Extraction of Cotton Stalk Cellulose by the Low Eutectic Solvent Method and Its Effects on PP Properties
To alleviate the environmental pressure caused by waste cotton stalks,improve the comprehensive use of cotton stalk by-products,and improve the strength and rigidity of polypropylene(PP),the low eutectic solvents(DES)were used to separate cellulose from cotton stalks,the properties of the extracts and their influences on the thermogravimetric analysis performances of PP were analyzed.The results show that the cellulose modifications affect the crystallinity,crystallization temperature,water absorption,rheological and mechanical properties of PP.When the mass fraction of additive cellulose extracted by the low eutectic solvents(DESC)is 4%,the crystallinity could be increased without affecting the crystalline properties of PP.Tc of the specimen increases to 112.45℃,and the impact strength of the specimen is4.47 kJ/m2,which is20.13%higher than that of pure PP specimen.The tensile strength and elongation at break slightly decrease.In the aspect of the rheological properties,the ten-min static torque has the slowest decreasing tendency.At the same time,although the water absorption of the PP/DESC modified material increases with the increase of DESC content,there is no significant increase in the water absorption of the material when the DESC content increases from 2 phr to 8 phr.
万方数据
维普
