CELLULOSE-G-POLY(METHYLENESUCCINIC ACID): SYNTHESIS, CHARACTERIZATIONS, AND INITIAL STUDY ON ITS POTENTIAL AS AN ADSORBENT FOR DYES

• Main Author: Mazaya, Yasmin
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/83057
• Institution: Institut Teknologi Bandung

Dyes, such a rhodamine B and methylene blue are commonly used in the textile industry. Dyes can be hazardous to human health and the environment if their waste processing is not proper. Cellulose is one of the most abundant biomass on earth and can be found in many plants and is often used as an adsorbent. In this research, cellulose was isolated from alang-alang stems. The method used for cellulose isolation involved using 5% NaOH (b/v) to break the ester bonds in lignocellulose and 5% NaOCl (v/v) for bleaching. The cellulose yield was 24.8% (b/b). Subsequently, graft copolymerizations using the conventional and heating methods were performed to synthesize cellulose-g-poly(methylenesuccinic acid). The initiation reaction used cerium ammonium nitrate (CAN) as an initiator, with the hope that 50% of the glucose molecules in cellulose would be initiated to form radicals. The graft polymerization used methylenesuccinic acid (AMS) as a monomer to modify cellulose. The theoretical degree of polymerization (DPn) of the synthesized products was formulated at DPn 10 and 20. The best yield and grafting percentage were obtained using the microwave assisted method. The yield and grafting percentage for theoretical DPn of 10 were 34% (b/b) and 60% (b/b), respectively, while those for theoretical DPn of 20 were 23% (b/b) and 93% (b/b). Respectively characterizations of cellulose and cellulose-g-poly(AMS) were performed using Fourier Transform Infrared (FTIR) and X-ray Diffraction (XRD). The FTIR result for cellulose-g poly(methylenesuccinate) showed the presence of a new peak at 1700 cm??, which was the vibration of the C=O group from AMS grafted onto cellulose. Adsorption of rhodamin B was performed at 25 °C with stirring at 200 rpm for 190 minutes. The optimum pH condition for Rhodamin B adsorption by cellulose, cellulose-g-poly(AMS) DPn 10, and cellulose-g poly(AMS) DPn 20 was pH 9, with adsorption density for the three adsorbents were 16.98 mg/g, 17.97 mg/g, and 15.57 mg/g, respectively. Adsorption of methylene blue at pH 8 showed the best adsorption density by cellulose with a value of 46,2123 mg/g.