Abstract
The effects of methyl and methoxy groups in Direct Blue 1 and Direct Blue 53 on the structure of nascent microbial cellulose were characterized by X-ray, solid state 13C NMR and deuteration-IR measurements. There were no other differences between these two direct dyes, except methyl and methoxy groups. The product obtained from Acetobacter-culture in the presence of each Direct Blue 1 and Direct Blue 53 is a crystalline complex composed of a dye and cellulose, and the product has a structure in which the dye molecule is between the cellulose sheets corresponding to the (100) plane of the complex, i.e., (110) planes of microbial cellulose. Celluloses regenerated from both products form cellulose II. Although Direct Blue 1 contains two methoxy groups and Direct Blue 53 contains two methyl groups, different effects of these groups on the structure of nascent microbial cellulose were not identified.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have