By observing the surface morphologies of the regenerated cellulose
and composite films, it can be seen that the free and fracture
surfaces of all films display uniformity from the interior to the surface,
that is, a dense and homogeneous texture. It is different from
the structure of the cellulose regenerated from NaOH/H2O (Zhang
et al., 2001, 2002), no porous structure can be observed. Moreover,
with the addition of starch and lignin to cellulose, no obvious
phase separation can be seen and there is not any phase interfaces
among these three kinds of biopolymers. T
By observing the surface morphologies of the regenerated celluloseand composite films, it can be seen that the free and fracturesurfaces of all films display uniformity from the interior to the surface,that is, a dense and homogeneous texture. It is different fromthe structure of the cellulose regenerated from NaOH/H2O (Zhanget al., 2001, 2002), no porous structure can be observed. Moreover,with the addition of starch and lignin to cellulose, no obviousphase separation can be seen and there is not any phase interfacesamong these three kinds of biopolymers. T
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