Preparation of cellulose acetate by acetylation of bamboo cellulose
Bamboo cellulose was acetylated to produce cellulose acetate.The effects of catalyst type,solid to liquid ratio,catalyst volume and reaction time on the degree of substitution and insoluble residue content of acetylated bamboo cellulose were investigated.The characterization of acetylated products was performed by Fourier transform infrared(FTIR) and X ray diffraction(XRD) analyses.The results showed that the lattice of bamboo cellulose was destructed after the hydroxyl groups were substituted with acetyl groups.The optimal reaction conditions were as followed: the ratio of bamboo cellulose to acetic anhydride 1: 5,the dosage of H2SO4 9.0% and the reaction time 2.5 h.Under this condition,the product presented good properties with less insoluble residues and substitution degrees of over 2.8.