Characteristics Of Carboximetyl Cellulose From Cassava’s Onggok On Variations Of Sodium Hydroxide And Trichloroacetic Acid Concentrations

Abstract

Onggok is tapioca solid waste that contains high cellulose reach 15% to 30% but has not been used  appropriately. This study aimed to determine the concentration of NaOH and TCA in producing the best  CMC characteristics of onggok. The study used a factorial randomized block design. The first factor  was the concentration of NaOH (15%; 30%; and 45%), and the second factor was the concentration of  TCA (10%; 20%; and 30%). The observed variable included degree of substitution, yield, water content,  NaCl content, and purity of CMC. The results showed that the concentration of NaOH and TCA  significantly affected the degree of substitution, yield, water content, viscosity, and purity of CMC. The  concentrations of 45% NaOH and 30% TCA produced the best CMC characteristics with yield, moisture  content, degree of substitution, viscosity, and CMC purity of 1.13±0.12, 22.86±0.15%, 9.57±0.53%,  170.00±10.00cPs, and 99.14±0.40%, respectively.