Abstract:
Cellulose acetate is a membrane material that can be used in the sensor field. One
source of cellulose acetate is from rice straw. This study aimed to study the effect of
iodine mass and acetylation time on cellulose acetate synthesis from rice straw. The
initial step is to isolate cellulose from rice straw, followed by cellulose acetate
synthesis using iodine catalyst by varying the amount of iodine as much as 0.1-0.3
grams and acetylation time for 1until 5 hours. The cellulose acetate was characterized
using an infrared spectrophotometer, and its viscosity was determined. The result
shows that the cellulose 33.63%. The maximum time of cellulose acetate acetylation
is 2 hours with a mass of iodine 0.2 g. The yield of cellulose acetate was 14.98%, with
an acetyl value of 19.11% and a degree of substitution of 0.89. The cellulose acetate
produced has a low viscosity. The FTIR characterization of cellulose acetate shows
O-H functional groups at 3333 cm-1
, C-H functional groups at 2897 cm-1
, carbonyl
functional groups at 1722 cm-1 C-O functional groups at 1029 cm-1
that were identical
in cellulose acetate compounds. The amount of iodine and the acetylation time
affected the cellulose acetate product.
