Study of Fourier Transform Infrared Spectroscopy and Scanning Electron Microscope of Cellulose Acetate Membrane from Wastewater of Tapioca

Abstract

ABSTRACT. Wastewater of tapioca is waste product from starch precipitation or separation process from its water in making tapioca. This wastewater still contains carbohydrates such as glucose, so it can be used as raw material for making cellulose and cellulose acetate (CA) membrane, Nata de cassava was made by fermentation process using Acetobacter xylinum In wastewater of tapioca as the fermentation media. Then, the nata was dried and grinded to produce bacterial cellulose (Be) powder. BC powder was reacted with acetic anhydride to produce CA powder. CA powder was dissolVed to acetone solvent (appropriate with an acetyl degree of CA) with 1696 w/v composition and then formed to be a membrane. These CA membraM was characterized with Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM) .. Analysis from FTIR spectrum showed that CA was formed, by the existence of absorption band of C carbonyl at 1725.92 cm-1 wavenumber and CoO acetyl at 1061.37 cm-l. The resuh: of SEM analysis showed that the membrane which has been produced was the mlcrofiltration and asymmetric membrane with the diameter pore approximately of 0.37-0.95 IJ.m. CA powder that has been prodliJced had a water content of 21.39% and an acetyl degree of 40.38% (equal with substitution degree of 2.51).