The Adsorption Effect of Chitosan/ Graphene Oxide / Polyvinyl Alcohol Film for C.I. Basic Blue 41 Dyestuff

• Main Authors: JAO,AN, 饒萻
• Other Authors: TSAI,I-SHOU
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/nxm5g6

碩士 === 逢甲大學 === 纖維與複合材料學系 === 105 === The graphene oxide has good dispersibility in water, but it is not conducive to the recovery treatment after adsorbing the dye. Therefore, in this study, we tried to fabric a film could be used to facilitate the adsorption and repetition of the waste water. In this study, graphene oxide was prepared by using modified Hummers, then the amine groups on chitosan were bonded with carboxylic acid groups on graphene oxide to form amide bonds. Polyvinyl alcohol was added to increase the strength of the films. Finally, we investigated the film adsorption of Salt - based Dye (CI Basic Blue 41). The experimental results showed that the morphology the film before and after the adsorption of dyes by scanning electron microscopy (SEM). The surface of the film was altered from porous to smooth. Infrared spectroscopy (FTIR) tests showed that the film had absorption peak both chitosan and graphene, and peak of amide bond showed at 1560 cm-1. A C-O displacement was found after the adsorption of dye which was caused by the charge interaction between dye and graphene oxide. The high the graphene oxide content was, the higher is the adsorption rate. The optimal condition was the addition of 30 ml of chitosan / GO / PVA composite film with 30 ml of graphene oxide, and the maximum adsorption rate reached 97.37%. The reuse tests showed that the adsorption rate could still reach more than 85% after five adsorption and desorption tests. Comparison of Langmuri and Freundlich two isothermal adsorption modes showed that Langmuri was conducive to adsorption, its correlation coefficient was 0.965 closest to 1 which could be set into the formula to get the balance parameter of 0.1268.