Transmission electron microscope (TEM) was employed to get
the information ofthe morphology and average size ofthe cellulose
nanocrystals (CNCs), which was shown in Fig. 1. Wherein, Fig. 1A
and C were TEM photos ofthe obtained pure CNC and CNC modified
with PSt, while Fig. 1B and D were the static size distributions of
the length of the pure CNC and CNC modified with PSt. Perfect long
bony fiber-like morphology of CNC could be observed in Fig. 1A. It
suggested that the separation of the fiber through hydrolysis was
successful. The size of CNC was calculated statically, as shown in
Fig. 1B. One hundred nanofibers were selected and measured with
the ruler tool. The result showed that the average length of CNC
was about 120–180 nm. As shown in Fig. 1C and D, the length of
CNC modified with PSt was not apparently changed. However, the
diameter ofthemodifiedCNC wasdecreased. These results revealed
that the morphology of CNC modified with PSt was not apparently
destroyed.