Zinc oxide (ZnO)-cellulose composite not only solves the problem of the flocculation of ZnO particles, but also has the advantages of ZnO particles and cellulose, so that it is widely used in the fields of packaging, medicine, electrochemistry and so on. Many researches focus on its preparation and application. Meanwhile, few speculated that the hydroxyl groups on cellulose reacted with Zn2+ or ZnO to make ZnO loading on cellulose. In this paper the loading mechanism of ZnO on cellulose was investigated. The main work is to investigate the effects of the mixing process of ZnCl2 and NaOH solutions with cellulose and the amount of free hydroxyl & carboxyl groups on cellulose on the ZnO loading on cellulose. More free hydroxyl and carboxyl groups are obtained by the beating in the papermaking process and TEMPO oxidation process. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize ZnO-cellulose composite. The results showed that the mixing process of ZnCl2 and NaOH solutions with cellulose had an obvious effect on the loading of ZnO on cellulose. Free hydroxyl and carboxyl groups on cellulose controlled the nucleation and growth of ZnO on cellulose. The amount of ZnO particles on cellulose significantly increased as the amount of free hydroxyl and carboxyl groups on cellulose increasing. Moreover, the smaller the size of ZnO particles on cellulose and more uniform distribution on cellulose.

Effects of cellulose on the loading of Zinc oxide on cellulose

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.