Cellulose Fibers from Solutions of Bacterial Cellulose in N-Methylmorpholine N-Oxideстатья
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Дата последнего поиска статьи во внешних источниках: 3 марта 2021 г.
Аннотация:Fibers of bacterial cellulose were obtained for the first time from solutions in N-methylmorpholine
N-oxide (NMMO) by using the concept of solid-phase dissolution of bacterial cellulose. The mechanism
of solid-phase dissolution of bacterial cellulose in NMMO is examined with due regard to the structural
and morphological characteristics of native bacterial cellulose. By investigating the structure of the
fibers it was possible to reveal the different orientation of the main diffraction planes of the outer shell
and inner part of the fiber reflecting the structural aspect of the shell–core morphology. The fibrillar
morphology of the fiber was established by scanning electron microscopy. The thermal characteristics of
the fibers of bacterial cellulose differ radically from the characteristics of fibers of plant origin in the
preponderance of condensation processes that produce exo effects on the thermograms and lead to
increase of the carbon residue. The mechanical characteristics of the obtained fibers were characterized.