title: Synthesis and characterization of cellulose acetate from rice husk: eco-friendly condition.
abstract: Cellulose acetate was synthesized from rice husk by using a simple, efficient, cost-effective and solvent-free method. Cellulose was isolated from rice husk (RH) using standard pretreatment method with dilute alkaline and acid solutions and bleaching with 2% H2O2. Cellulose acetate (CA) was synthesized successfully with the yield of 66% in presence of acetic anhydride and iodine as a catalyst in eco-friendly solvent-free conditions. The reaction parameters were standardized at 80 °C for 300 min and the optimum results were taken for further study. The extent of acetylation was evaluated from % yield and the degree of substitution (DS), which was determined by (1)H NMR and titrimetrically. The synthesized products were characterized with the help modern analytical techniques like FT-IR, (1)H NMR, XRD, etc. and the thermal behavior was evaluated by TGA and DSC thermograms.
authors.affiliation: Natural Products Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785 006, Assam, India. Electronic address: archanads2@gmail.com.
authors.forename: Archana M
authors.initials: AM
authors.lastname: Das
authors.affiliation: Natural Products Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785 006, Assam, India.
authors.forename: Abdul A
authors.initials: AA
authors.lastname: Ali
authors.affiliation: Natural Products Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785 006, Assam, India.
authors.forename: Manash P
authors.initials: MP
authors.lastname: Hazarika
keywords: Cellulose; Cellulose acetate; Eco-friendly condition; Iodine; Rice husk