The Research On The Conductivity Promotion Of Nano-cellulose

In the global energy and environmental needs of increasingly tense situation, Nano-Cellulose as a completely new materials from nature has got people of all ages. Currently Nano-Cellulose in the application of the matrix composite has been a research focus. In this paper, Nano-Cellulose and the conductive material Polyaniline were complexed via some means, the complex experiments and the applications of the composites were explored.First, the preparation of Nano-Cellulose was explored via some experiments. After the pulp was pretreatment using miniature plant pulper, different concentrations of sulfuric was used, the action temperature was controlled strictly, under these conditions, the pulp material was broken down and the Nano-Cellulose was prepared. The results showed that:With controlled action conditions, the Nano-Cellulose could be prepared by acid hydrolysis action. The appropriate experimental control conditions should be:the action temperature was 45℃, sulfuric acid concentration was 65%, the ultrasonic time was 30 min and the action time was 30min too.Secondly, the method for synthesizing Polyaniline was also explored and some product which had better conductive properties was prepared. Polyaniline was synthesized by chemical oxidation reaction with Ammonium Persulfate which was used as oxidan agent under acidic condition, when the reaction temperature was controlled. The synthesized Polyaniline was doped with a certain concentration of proton acid, after the doping reaction was completed, the conductivity of Polyaniline was measured by Four-Point Probes. Experiments showed the optimum reaction condition was that the concentration of hydrochloric acid, the reaction temperature, the Ammonium Persulfate and Aniline molar ratio were 2 mol/L,0℃,1:1 individually. The conductivity of the synthesized Polyaniline could reach 10S/cm under these conditions.Then, the study investigated the preparation of Nano-Cellulose-based electrically conductive Polyaniline, the complexed action not only improved the dissolution properties of the conductive Polyaniline, but also enhanced the physical and chemical strength of Polyanilinel. The results showed that:The Nano-Cellulose and Polyaniline should be complexed in situ composite method. The Nano-Cellulose should be added while the Polyaniline was prepared. In this way, the composite product had better dispersion properties, the molar ratio of Nano-Cellulose and Polyaniline should be 3:2, under this ratio, the product had better performance on the conductivity and film-forming properties. The conductivity of the product was 0.63 S/cm. The product had a higher dissolution rate in N-methylpyrrolidone, up to 89.4%.Finally, some experiments were done to explore how to apply the composite product.The epoxy resin was added with the product, curing the coating on a glass plate. Experiments showed that:A smooth surface and conductivity film was prepared. And the film had a better performance on resistance to sulfuric.The innovation of this paper was the use of Nano-Cellulose in the synthesized action of Polyaniline, this experiment improve the dissolution rate of Polyaniline which was meaningful for its application.In summary, this paper studied the preparation of Nano-Cellulose and Polyaniline experiment, on this basis, a composite action of them was discussed and a conductivity film was made by the composite product. Therefore, the study in this article were meaningful in theoretical research and significance in practical application.