Optimum Method and Conditions of Carboxymethyl Cellulose Production from Rice Straw

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Nipaporn Saengchu
Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131
Chuleeporn Puttnual
Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131
Vanida Pongsakchat
Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131
Kullaya Limroongreungrat
Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131
Arpathsra Sangnark
Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131

Abstract

Three methods of carboxymethyl cellulose (CMC) production from rice straw were compared basedon degree of substitution (DS) and purity. Methods varied in 1) solvent medium, sodium hydroxide concentration,temperature and time of etherification and 2) purification processes. CMC quality was highestwhen ethanol was used as solvent medium in etherification and the product was purified by soxhlet extraction.The optimum conditions for CMC production were then investigated as follows: Sodium hydroxideconcentration (35, 45 and 55%), amount of sodium chloroacetate (0.75, 1.0 and 1.25 g/g cellulose),temperature (50, 60 and 70 °C), and time (60, 70 and 80 min). The results indicated that CMC, produced byusing 55% sodium hydroxide solution and 1.0 g sodium chloroacetate/g cellulose at 50 °C and 70 min, hadthe highest DS (0.6) and purity (99%).

Keywords : Carboxymethyl Cellulose / Rice Straw

Article Details

Issue
Vol. 31 No. 4 (2008): October - December
Section
Original Articles
Author Biographies

Nipaporn Saengchu, Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131

Undergraduated Student, Department of Food Science, Faculty of Science.

Chuleeporn Puttnual, Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131

Lecturer, Department of Chemistry, Faculty of Science.

Vanida Pongsakchat, Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131

Lecturer, Department of Mathematics, Faculty of Science.

Kullaya Limroongreungrat, Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131

Assistant Professor, Department of Food Science, Faculty of Science.

Arpathsra Sangnark, Burapha University, Long-Hard Bangsaen Road, Saensook, Maung, Chonburi 20131

Assistant Professor, Department of Food Science, Faculty of Science.