Study on synthesis of carboxymethyl cellulose from pineapple leaf waste and its potential applications as a thickener

Authors

  • Phan Thi Tuyet Mai*
  • Nguyen Hai Linh
  • To Phuong Linh
  • Vu Tien Manh
  • Ngo Hong Anh Thu
  • Pham Ngoc Lan
  • Luu Thi Hue

Keywords:

carboxymethyl cellulose, cellulose viscosity, hemicellulose, pineapple leaf waste

Abstract

In this study, cellulose and hemicellulose were successfully extracted from pineapple leaf waste at yields of 58.8 and 16.1% by dried weight, respectively. Carboxymethyl cellulose (CMC) was synthesised from pineapple leaf cellulose by an esterification process using sodium hydroxide (NaOH) and monochloroacetic acid (MCA) with isopropanol as the supporting medium. Preparation of CMC was investigated by varying three free factors, namely, NaOH concentration, MCA dose, and cellulose size. The carboxymethylation process was optimised to produce CMC with differing degrees of substitution (DS). The highest DS of CMC (0.86) was obtained with 15% (w/v) NaOH solution, 0.6 g of MCA/g cellulose, and 50 μm cellulose. The obtained CMC were characterised by FTIR spectroscopy, SEM images and XRD diffractions. Moreover, the thickening performance of obtained CMC was also determined. The influence of the CMC’s molecular weight and degree of substitution on the viscosity of 1% (w/v) aqueous solution was tested. The experimental results suggest that the viscosity of the solution increases with increasing molecular weight and degree of substitution of CMC.

DOI:

https://doi.org/10.31276/VJSTE.65(3).32-38

Classification number

2.2, 2.3

Author Biographies

Phan Thi Tuyet Mai

Faculty of Chemistry, University of Science, Vietnam National University - Hanoi, 19 Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Hanoi, Vietnam

Nguyen Hai Linh

Faculty of Chemistry, University of Science, Vietnam National University - Hanoi, 19 Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Hanoi, Vietnam

To Phuong Linh

Faculty of Chemistry, University of Science, Vietnam National University - Hanoi, 19 Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Hanoi, Vietnam

Vu Tien Manh

Faculty of Chemistry, University of Science, Vietnam National University - Hanoi, 19 Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Hanoi, Vietnam

Ngo Hong Anh Thu

Faculty of Chemistry, University of Science, Vietnam National University - Hanoi, 19 Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Hanoi, Vietnam

Pham Ngoc Lan

Faculty of Chemistry, University of Science, Vietnam National University - Hanoi, 19 Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Hanoi, Vietnam

Luu Thi Hue

University of Adelaide, Adelaide SA 5005, Australia

Downloads

Published

2023-09-15

Received 25 August 2022; revised 9 November 2022; accepted 14 November 2022

How to Cite

Phan Thi Tuyet Mai, Nguyen Hai Linh, To Phuong Linh, Vu Tien Manh, Ngo Hong Anh Thu, Pham Ngoc Lan, & Luu Thi Hue. (2023). Study on synthesis of carboxymethyl cellulose from pineapple leaf waste and its potential applications as a thickener. Vietnam Journal of Science, Technology and Engineering, 65(3), 32-38. https://doi.org/10.31276/VJSTE.65(3).32-38

Issue

Section

Physical Sciences