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https://dspace.ctu.edu.vn/jspui/handle/123456789/71739
Title: | Study on extracting hemicellulose, cellulose, and carboxymethyl cellulose from Vietnamese rice straw waste |
Authors: | Phan, Mai Thi Tuyet La, Trang Thu Ngo, Thu Hong Anh |
Keywords: | Carboxymethyl cellulose Cellulose Nemicellulose Vietnamese rice straw waste |
Issue Date: | 2021 |
Series/Report no.: | Vietnam Journal of Science, Technology and Engineering;Vol. 63, No. 01 .- P.15-20 |
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 90°C 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 90°C 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 70°C 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. |
URI: | https://dspace.ctu.edu.vn/jspui/handle/123456789/71739 |
ISSN: | 2525-2461 |
Appears in Collections: | Vietnam journal of Science, Technology and Engineering |
Files in This Item:
File | Description | Size | Format | |
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_file_ Restricted Access | 2.11 MB | Adobe PDF | ||
Your IP: 3.149.251.22 |
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