Optimization of Carboxymethylation of Starch in Organic Solvents

Kamel, Samir; Jahangir, K.

doi:10.1080/00914030600945770

Cited by 20 publications

(13 citation statements)

References 17 publications

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“…[24] In the past, carboxymethylation has been an effective chemical technique to modify biomass. [39,40] The carboxymethylation of cellulosew as also conducted, and the product was evaluated by using 1D 1 Ha nd 13 CNMR spectroscopy,2D 1 H- 13 Ch eteronuclear single quantum coherence( HSQC) spectroscopy,n ear-infrared( NIR) spectroscopy,F ourier transform (FT) Ramans pectroscopy,U V/Vis spectroscopy,X RD, and SEM. [13,[25][26][27][28][29][30][31][32][33][34][35][36][37][38] In addition, the carboxymethylationo fs tarch has been studied in different reaction media.…”

Section: Introductionmentioning

confidence: 99%

“…[13,[25][26][27][28][29][30][31][32][33][34][35][36][37][38] In addition, the carboxymethylationo fs tarch has been studied in different reaction media. [39,40] The carboxymethylation of cellulosew as also conducted, and the product was evaluated by using 1D 1 Ha nd 13 CNMR spectroscopy,2D 1 H- 13 Ch eteronuclear single quantum coherence( HSQC) spectroscopy,n ear-infrared( NIR) spectroscopy,F ourier transform (FT) Ramans pectroscopy,U V/Vis spectroscopy,X RD, and SEM. [41][42][43][44][45] Moreover,c arboxymethylationw as used on Cassia angustifolia seed gum and chitosant oi mprove their rheological properties for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Carboxyethylated Lignosulfonate

Bahrpaima

Fatehi

2018

ChemSusChem

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Lignosulfonate is a byproduct of the sulfite pulping process and has limited use in industry. The main objective of this study was to investigate the carboxyethylation of lignosulfonate to increase its charge density to broaden its applications. The carboxyethylation of lignosulfonate was optimized under the conditions of 30 wt % NaOH, 2.0 mol mol 2-chloropropinic acid/lignosulfonate, 90 °C, 0.5 h, and 0.03 mol 2-chloropropinic acid, which produced carboxyethylated lignosulfonate with a charge density and molecular weight of -3.51 meq g and 46 493 g mol , respectively. The mechanism of the carboxyethylation reaction using 2-chloropropinic acid by an S 1 pathway in an alkaline solution was discussed. Methylation was also used to mask the phenolic hydroxide groups of lignosulfonate to investigate if carboxyethylation occurred on aliphatic hydroxide groups of lignosulfonate. The produced carboxyethylated lignosulfonate was characterized by using FTIR spectroscopy, NMR spectroscopy, gel permeation chromatography, and elemental and functional group analyses. Basic H- H 2 D COSY NMR spectroscopy was used to record the coupled spins of the carboxyethyl group on carboxyethylated lignosulfonate. The information from 1 D H NMR and 2 D NMR COSY spectroscopy provided evidence for the existence of a 1-carboxyethyl group on the carboxyethylated lignosulfonate structure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Carboxyethylated Lignosulfonate

Bahrpaima

Fatehi

2018

ChemSusChem

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“…The characteristic bands for CMC (3619 and 1630 cm −1 for stretching and bending vibrations of OH group) were notably less intensive after the crosslinking reaction. Thus, the esterification (for crosslinking) was mainly carried out with the OH group at C6 of CMC chain …”

Section: Resultsmentioning

confidence: 99%

High efficiency antimicrobial cellulose‐based nanocomposite hydrogels

Abou-Yousef

Kamel

2015

J of Applied Polymer Sci

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Carboxymethyl cellulose hydrogels were developed through crosslinking process using maleic, succinic, or citric acids. The swelling capacities of the obtained hydrogels have been controlled through variation of the crosslinking reaction conditions. Further enhancement of the swelling properties was achieved by additional blending step of the carboxymethyl cellulose with polyethylene glycol. Biofunctionalization of the hydrogels was achieved through "in situ" incorporation of the silver nanoparticles during the crosslinked reaction. Chemical structure verifications and morphological characterizations of the hydrogels were performed using FTIR, XRD, EDX, and SEM analyses. Finally, the antimicrobial activity of the loaded silver hydrogels against G1ve, G2ve, and yeast Candida albicans was demonstrated.

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“…Carboxymethylation of Sago starch (SS) was carried out by following slight modified method described elsewhere [8][9][10]. In this method Sago starch (4 g), NaOH (3.2 g) and monochloroacetic acid (4 g) were taken in a beaker, with 20 ml of Isopropyl alcohol and water (50:50) and the contents were subjected to continuous stirring to homogeneity.…”

Section: Modification Of Sago Starchmentioning

confidence: 99%

Microwave Assisted Synthesis and Evaluation of Cross-Linked Carboxymethylated Sago Starch as Superdisintegrant

Singh¹,

Nath²,

Guha³

et al. 2011

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The aim of this study was to modify the sago starch and evaluate its efficacy as tablet disintegrant. Cross-linked car-boxymethylated sago starch (CMSS) was synthesized using native sago starch (SS) and monochloroacetic acid (MCA) with sodium hydroxide in microwave radiation environment. FT-IR analysis of the sample confirmed the carboxy-methylation by showing absorption peak at 1607.2 cm-1. CMSS with degree of substitution (DS) of 0.31 was formed and, it was further evaluated as disintegrant in Ondasetron based tablets. The results revealed that CMSS could be used as disintegrant in tablet formulation in concentration dependant manner

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Optimization of Carboxymethylation of Starch in Organic Solvents

Cited by 20 publications

References 17 publications

Synthesis and Characterization of Carboxyethylated Lignosulfonate

Synthesis and Characterization of Carboxyethylated Lignosulfonate

High efficiency antimicrobial cellulose‐based nanocomposite hydrogels

Microwave Assisted Synthesis and Evaluation of Cross-Linked Carboxymethylated Sago Starch as Superdisintegrant

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