The thermal analysis of natural bentonite and DAH-bentonite
was also performed to observe the modification of bentonite. The
DTG peak at 440.81 8C for DAH-bentonite confirms modification,
whereas this peak is not observed in natural bentonite. When the
DTG peaks are at around 100 8C for DAH-bentonite compared to
that of natural bentonite, the intensity of the peak decreased for
DAH-bentonite due to the increase in hydrophobicity as a result of
modification.