Study on extracting hemicellulose, cellulose, and carboxymethyl cellulose from Vietnamese rice straw waste

Authors

  • Mai Thi Tuyet Phan Faculty of Chemistry - University of Science, Vietnam National University, Hanoi, Vietnam
  • Trang Thu La Faculty of Chemistry - University of Science, Vietnam National University, Hanoi, Vietnam
  • Thu Hong Anh Ngo Faculty of Chemistry - University of Science, Vietnam National University, Hanoi, Vietnam

Keywords:

carboxymethyl cellulose, cellulose, hemicellulose, Vietnamese rice straw waste

Abstract

Cellulose and hemicellulose were successfully extracted from Vietnamese rice straw waste. The maximum hemicellulose yield of the process was 22.60% with 1.5 M NaOH at 90oC for 1.5 h. The pure cellulose obtained from the rice straw was prepared by refluxing the rice straw powder with a 1.0 M HNO3 solution at 90oC for 1.5 h. The Vietnamese rice straw cellulose was converted to carboxymethyl cellulose (CMC) by etherification. The extracted cellulose was soaked in a mixed solution of isopropyl alcohol and NaOH solution for 1.5 h. After that, it was reacted with monochloroacetic acid at 70oC for 1.5 h. The optimum conditions for carboxymethylation were 5 g cellulose, 4.0 g monochloroacetic acid, and 15 ml 25% w/v NaOH and the obtained product had a degree of substitution (DS) of 0.70.

DOI:

https://doi.org/10.31276/VJSTE.63(1).15-20

Classification number

2.2

Downloads

Published

2021-03-15

Received 15 May 2020; accepted September 2020

How to Cite

Phan, M. T. T. ., La, T. T., & Ngo, T. H. A. (2021). Study on extracting hemicellulose, cellulose, and carboxymethyl cellulose from Vietnamese rice straw waste. Vietnam Journal of Science, Technology and Engineering, 63(1), 15-20. https://doi.org/10.31276/VJSTE.63(1).15-20

Issue

Section

Physical Sciences