Synthesis and characterization of microcrystalline cellulose produced from bacterial cellulose |
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| Authors: | Rafael Leite de Oliveira Hernane da Silva Barud Rosana M N de Assunção Carla da Silva Meireles Geandre Oliveira Carvalho Guimes Rodrigues Filho Younes Messaddeq Sidney José Lima Ribeiro |
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| Institution: | 1.LaMF—UNESP Instituto de Química,Araraquara,Brazil;2.FACIP Curso de Química—UFU Ituiutaba,Ituiutaba,Brazil;3.Instituto de Química—Universidade Federal de Uberlandia/UFU Uberlandia,Uberlandia,Brazil;4.Instituto Federal do Triangulo Mineiro—IFTM, campus Paracatu,Paracatu,Brazil |
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| Abstract: | In this study, microcrystalline cellulose (MCC) was prepared from the acid hydrolysis of bacterial cellulose (BC) produced
in culture medium of static Acetobacter xylinum. The MCC-BC produced an average particle size between 70 and 90 μm and a degree of polymerization (DP) of 250. The characterization of samples was performed by thermogravimetric analysis, X-ray diffraction, and scanning electron
microscopy (SEM). The MCC shows a lower thermal stability than the pristine cellulose, which was expected due to the decrease
in the DP during the hydrolysis process. In addition, from X-ray diffractograms, we observed a change in the crystalline structure.
The images of SEM for the BC and MCC show clear differences with modifications of BC fiber structure and production of particles
with characteristics similar to commercial MCC. |
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