Preparation And Characterization Of Palm Nanocellulose And Research On Its Application

Windmill palm fiber is a kind of fiber material with wide sources and excellent properties.In order to conduct further study and tap its utilization value,nanocellulose from windmill palm fibers was prepared by TEMPO oxidation and acid hydrolysis.The structure and properties of windmill palm nanocellulose were characterized.Then nanocellulose was applied to produce membrane materials with excellent performance,the optimum technology of membrane preparation was explored,and the performance of the membrane was characterized.The membrane material was endowed with functionality,and its practical application was preliminarily discussed.The main results are as follows:Nanocellulose from windmill palm fibers was prepared by TEMPO mediated oxidation and acid hydrolysis,and the structure and properties of nanocellulose were characterized.The nanocellulose by TEMPO mediated oxidation has the characteristics:minor diameter,uniform dispersion,stable crystal structure.Nanocellulose by TEMPO mediated oxidation is more suitable for further application.Taking the mechanical properties as the index,the optimum preparation process of windmill palm nanocellulose films was the homogenizing machine pressure 350 MPa and homogenizing treatment time 30 minutes.The nanocellulose film was and dense.And the nanocellulose film was layered directionality.Each layer is about 0.05 μn.Besides,the film was hydrophilic,whose fitting equation was Y=-5.965X+77.72 for the ratio of video contact angle(Y)to glycerol(X).The film endowed with a response to pH was producted.The optimum process was as follows:the mass ratio of glycerol to glycerol 2,the surface density of anthocyanin 25 mg/dm2,and the drying temperature 65 degrees Celsius.Anthocyanins were clustered on the surface of the film in the form of clusters,which effectively guaranteed the integrity of the film structure and the efficiency of the whole reaction process.The color film has excellent effect,wide indication range and repeatability,which proves that the functional film has excellent potential for reuse in practical production and application.