RESULTS AND DISCUSSION
Infrared Spectroscopy. ATR-FTIR spectra of the samples
are presented in Figure 2. Trimethylsilyl groups, abundant in
TMCS (agent for hydrophobization of cellulose) but not
present in cellulose, are distinguishable marker. After
modification with TMCS, the vibrations characteristic of the
CH3 of silane was identified at 2970 cm−1 (ν(C−H)) and 750
cm−1 (δ(C−H)).14,61 Moreover, Si−CH3 bending at 1254 cm−1
and Si−C stretching at 840 and 870 cm−1 were obvious.62 The
intensity of these bands increased with the increased amount of
chlorosilane in the reaction. While the O−H stretching at 3400
cm−1 did not vary obviously, which means the amount of
hydroxyl group (−OH) of the bacterial cellulose has no