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Title: Synthesis, characterization, and application of carboxymethyl cellulose from asparagus stalk end
Authors: Warinporn Klunklin
Kittisak Jantanasakulwong
Yuthana Phimolsiripol
Noppol Leksawasdi
Phisit Seesuriyachan
Thanongsak Chaiyaso
Chayatip Insomphun
Suphat Phongthai
Pensak Jantrawut
Sarana Rose Sommano
Winita Punyodom
Alissara Reungsang
Thi Minh Phuong Ngo
Pornchai Rachtanapun
Keywords: Chemistry
Materials Science
Issue Date: 1-Dec-2021
Abstract: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Cellulose from Asparagus officinalis stalk end was extracted and synthesized to carboxymethyl cellulose (CMCas ) using monochloroacetic acid (MCA) via carboxymethylation reaction with various sodium hydroxide (NaOH) concentrations starting from 20% to 60%. The cellulose and CMCas were characterized by the physical properties, Fourier Transform Infrared spectroscopy (FTIR), Differential scanning calorimetry (DSC), Scanning electron microscopy (SEM) and X-ray diffraction (XRD). In ad-dition, mechanical properties of CMCas films were also investigated. The optimum condition for producing CMCas was found to be 30% of NaOH concentration for the carboxymethylation reaction, which provided the highest percent yield of CMCas at 44.04% with the highest degree of substitution (DS) at 0.98. The melting point of CMCas decreased with increasing NaOH concentrations. Crys-tallinity of CMCas was significantly deformed (p < 0.05) after synthesis at a high concentration. The L* value of the CMCas was significantly lower at a high NaOH concentration compared to the cellulose. The highest tensile strength (44.59 MPa) was found in CMCas film synthesized with 40% of NaOH concentration and the highest percent elongation at break (24.99%) was obtained in CMCas film treated with 30% of NaOH concentration. The applications of asparagus stalk end are as biomaterials in drug delivery system, tissue engineering, coating, and food packaging.
ISSN: 20734360
Appears in Collections:CMUL: Journal Articles

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