Synthesis and characterization of carboxymethyl cellulose with high degree substitution from Vietnamese pineapple leaf waste

  • Thi Dieu Phuong Nguyen, Nhu Thi Le, Tien Manh Vu, Truong Sinh Pham, Thi Dao Phan, Ngoc Lan Pham, Thi Tuyet Mai Phan*
Từ khóa: carboxymethyl cellulose, cellulose degree of substitution, Vietnamese pineapple leaf waste

Tóm tắt

In this work, cellulose was successfully extracted from pineapple leaf waste by 0.75 M NaOH at 90oC and 5 M HNO3 at 70oC for 1.5 h and 5 h, respectively. The obtained cellulose fibres, with average diameters of 150-300 nm, were converted to carboxymethyl cellulose (CMC) by esterification. The pure cellulose was soaked in a solution mixture of isopropanol and NaOH for 2 h. It was then reacted with chloroacetic acid (MCA) at 60oC for 1.5 h. The optimum conditions for carboxymethylation were found to be 5 g cellulose, 1.5 g MCA, and 15 ml 16% w/v NaOH. The obtained CMC had a high degree of substitution (DS) of 2.3. The properties of CMC were determined.

##submission.authorBiography##

Thi Dieu Phuong Nguyen, Nhu Thi Le, Tien Manh Vu, Truong Sinh Pham, Thi Dao Phan, Ngoc Lan Pham, Thi Tuyet Mai Phan*

Faculty of Chemistry, University of Science, Vietnam National University, Hanoi

điểm /   đánh giá
Phát hành ngày
2022-09-20
Chuyên mục
PHYSICAL SCIENCES