Preparation and synthesis of carboxymethyl cellulose from rice straw

Name: Chidchanok Sereenonchai

Organization : King Mongkut's University of Technology North Bangkok. Faculty of Engineering

Name: Santi Chuetor

Organization : King Mongkut's University of Technology North Bangkok. Faculty of Engineering

Email : santi.c@eng.kmutnb.ac.th

Name: Verawat Champreda

Organization : Thailand Science Park. National Center for Genetic Engineering and Biotechnology

Name: Suchata Kirdponpattara

Organization : King Mongkut's University of Technology North Bangkok. Faculty of Engineering

Name: Neelu Raina

Organization : King Mongkut's University of Technology North Bangkok. Faculty of Engineering

Name: Navadol Laosiripojana

Organization : King Mongkut's University of Technology Thonburi. Joint Graduate School for Energy and Environment

Name: Suttichai Assabumrungrat

Organization : Chulalongkorn University. Faculty of Engineering

keyword: Carboxymethyl cellulose

LCSH: Biomass conversion

; Rice straw

LCSH: Green chemistry

; Cellulose derivatives

LCSH: Renewable natural resources

Abstract: Rice straw (RS) is an abundant agricultural by-product in Thailand; often being disposed through burning thus causing PM2.5 and related environmental problems. Utilization of RS (cellulose-rich biomaterial) to produce value-added products, such as carboxymethyl cellulose (CMC), serves to increase the value of agricultural wastes and manage it without harming the environment. This research aims to find optimal conditions of alkaline peroxide pretreatment of RS for producing CMC. RS was first treated with different concentrations of hydrogen peroxide including 2.5, 5, and 7.5% (v/v), the solid:liquid ratio was 1:10 and the pH was adjusted to 11.5 (using 5M NaOH). The mixture was then incubated at 45 °C for different durations including 8, 16, and 24 h. The obtained cellulose-rich samples were used to cellulosebased material for CMC synthesis. The physical and chemical characterizations were conducted including FTIR, and XRD to examine the presence of functional groups and crystallinity index respectively. Moreover, the degree of substitution, and the whiteness index were also evaluated in order to find the suitable conditions for CMC synthesis from RS. The results indicated that the suitable condition of alkaline peroxide pretreatment for CMC production was 5% (v/v) of hydrogen peroxide after 16 h with CMC having the highest DS value (0.63) and the highest whiteness index. The FTIR results indicated the substitution of carboxymethyl group in cellulose sample extracted from RS. Therefore, RS is a potential raw material for CMC synthesis

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2024

Modified: 2025-03-07

Issued: 2025-03-07

BibliograpyCitation : In Thai Institute of Chemical Engineering and Applied Chemistry. The 33st Thai Institute of Chemical Engineering and Applied Chemistry International Conference (TIChE 2024) (pp.341-348). Bangkok : Thai Institute of Chemical Engineering And Applied Chemistry

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