| dc.description.abstract | This research discusses the manufacturing process and characterization of
superabsorbent (SAP) based on carboxymethyl cellulose (CMC) and hydroxyethyl
cellulose (HEC) with divinyl sulfone as a crosslinking agent. This study used a fixed
variable, namely the divinyl sulfone with the concentration is 0.04 M, while the
independent variable in this study was the ratio of carboxymethyl and hydroxyethyl
cellulose (1: 1; 3: 1; 5: 1; 7: 1, and 9: 1). Superabsorbent polymer was prepared by
first mixing HEC and CMC with a mass ratio of 2 g: 2 g; 1g: 3g; 0.6g: 3.3g; 0.5 g:
3.5 g: 0.4 g: 3.6 g and heated at 90 oC. Then added divinyl sulfone as a crosslinking
agent with a concentration of 0.04 M. The next step was the addition of 1 M KOH,
then allowed to stand for 6 hours. Then soaked with distilled water. The resulting gel
is dried with acetone. The films formed were smoothed and characterized by water
absorption, degree of cross-linking, FTIR, DSC, and TGA tests. The results of water
absorption with an optimum value are found in the SAP CMC:HEC 7:1 4% which is
2760% with a cross-linkage percentage ratio of 72.50%. The results of the FTIR
spectrum test showed the formation of superabsorbent polymers on SAP CMC:HEC
7:1 4% in the presence of –OH groups at a wavelength of 3220.4 cm-1
and –COO
groups at a wavelength of 1416.3 cm-1
. The results of the thermogram on thermal
analysis using DSC produce the value of the glass transition temperature (Tg) SAP is
between Tg CMC and HEC which is 126.71 oC where Tg CMC is 148.56 oC and Tg
HEC is at 151.68 oC which indicates that the content has been mixed between the two
samples. In the TGA analysis for the CMC sample it left a residue of 34.7% of the
initial mass and a mass loss of 65.2%, and for the optimum SAP sample the initial
mass loss was 69.35% and left a residue of 30.65% of the initial mass. | en_US |
