Study on selective acid hydrolysis of cellulose aggregation structure catalyzed by Fe~(3+)

It was a key technology that degraded the amorphous region and retained the crystalline region in the process of preparation of microcrystalline cellulose. It was studied that woodpulp was acid hydrolyzed catalyzed by Fe3 +. The crystal structure,chemical structure and microstructure of hydrocellulose were characterized by XRD,FT-IR and SEM. The results indicated that cellulose was promoted by Fe3 +during the acid hydrolysis at the mild condition and strengthening condition. The yield of hydrocellulose was 87. 28% and the crystallinity was 62. 89% under the strengthening condition.XRD results indicated that the crystal structure did not change during the acid hydrolysis of cellulose. FT-IR analysis showed that the hydrocellulose had the same functional groups as the cellulose and the contents of hydrogen bond had changed which led to the change of the absorption peak.