Physico-chemical characterisation of carboxymethylated spun cellulose fibres

Waring, Mike; Parsons, David

doi:10.1016/s0142-9612(00)00254-4

Cited by 112 publications

(51 citation statements)

References 16 publications

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“…In general, the DS of carboxymethyl cellulose obtained by alkalization reaction of cellulose with sodium mono chloroacetate was in the range of 0.4-1.3. CMC is fully soluble at DS above 0.4 and hydro affinity of CMC increases with increasing DS, while this polymer is swellable but insoluble below 0.4 [33]. The DS of CMC obtained in this work was in the expected range of 0.45-0.78, as figured in Figure 1A.…”

Section: Degree Of Substitution (Ds)supporting

confidence: 56%

Synthesis and Characterization of Carboxymethyl Cellulose from Sugarcane Bagasse

Asl¹,

Mousavi²,

Labbafi³

2017

J Food Process Technol

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Various raw materials including plant biomass, bacteria, algae and the Tunicates (marine animals) have been used to produce cellulose. However, agricultural waste has rarely been utilized for this purpose. In this work, Sugarcane bagasse was used as raw material to produce cellulose. Cellulose was extracted from sugarcane bagasse through the elimination of lignin and hemicellulose. Cellulose was then converted to carboxymethyl cellulose (CMC b ) by using sodium monochloroacet (SMCA) and various sodium hydroxide (NaOH) concentrations. Fourier Transform Infrared Spectroscopy (FTIR) was applied to verify the effect of NaOH concentration on this property. The highest viscosity and degree of substitution (DS=0.78) were observed in 30 gr/100 ml NaOH of carboxymethylation. Maximum tensile strength of the films produced at these conditions was 37.34 Mpa. The addition of a various amount of glycerol (1 ml/ 100 ml, 2 ml/ 100 ml, 3 ml/ 100 ml) dramatically decreased the tensile strength. The highest level of water vapor permeability was also observed at the same NaOH concentration. Cellulose can be correctly extracted from sugarcane bagasse and converted to carboxymethyl cellulose. Based on the cellulose of the bagasse characteristic, proper amount of NaOH was found to get a high DS. CMC b has considerable features for application on biodegradable coating materials.

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Section: Degree Of Substitution (Ds)supporting

confidence: 56%

Synthesis and Characterization of Carboxymethyl Cellulose from Sugarcane Bagasse

Asl¹,

Mousavi²,

Labbafi³

2017

J Food Process Technol

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“…The polymer is entirely aqueous soluble with its hydro affinity increasing with increasing DS [58]. An average DS of 0.62 was obtained with isopropanol as the solvent medium.…”

Section: Degree Of Substitution (Ds)mentioning

confidence: 97%

Optimizing Extraction of Cellulose and Synthesizing Pharmaceutical Grade Carboxymethyl Sago Cellulose from Malaysian Sago Pulp

et al. 2016

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Abstract:Sago biomass is an agro-industrial waste produced in large quantities, mainly in the Asia-Pacific region and in particular South-East Asia. This work focuses on using sago biomass to obtain cellulose as the raw material, through chemical processing using acid hydrolysis, alkaline extraction, chlorination and bleaching, finally converting the material to pharmaceutical grade carboxymethyl sago cellulose (CMSC) by carboxymethylation. The cellulose was evaluated using Thermogravimetric Analysis (TGA), Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) and Field Emission Scanning Electronic Microscopy (FESEM). The extracted cellulose was analyzed for cellulose composition, and subsequently modified to CMSC with a degree of substitution (DS) 0.6 by typical carboxymethylation reactions. X-ray diffraction analysis indicated that the crystallinity of the sago cellulose was reduced after carboxymethylation. FTIR and NMR studies indicate that the hydroxyl groups of the cellulose fibers were etherified through carboxymethylation to produce CMSC. Further characterization of the cellulose and CMSC were performed using FESEM and DSC. The purity of CMSC was analyzed according to the American Society for Testing and Materials (ASTM) International standards. In this case, acid and alkaline treatments coupled with high-pressure defibrillation were found to be effective in depolymerization and defibrillation of the cellulose fibers. The synthesized CMSC also shows no toxicity in the cell line studies and could be exploited as a pharmaceutical excipient.

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“…1 5 NS wound exudates by vertical absorption [12]. The gel forming ability is crucial in making Aquacel atraumatic to healing wounds, because it allows the dressing to adhere to wound surface without tissue growing into the dressing itself, thus protecting the delicate newly formed tissue.…”

Section: Discussionmentioning

confidence: 99%

Silver containing hydrofiber dressing promotes wound healing in paediatric patients with partial thickness burns

2016

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Physico-chemical characterisation of carboxymethylated spun cellulose fibres

Cited by 112 publications

References 16 publications

Synthesis and Characterization of Carboxymethyl Cellulose from Sugarcane Bagasse

Synthesis and Characterization of Carboxymethyl Cellulose from Sugarcane Bagasse

Optimizing Extraction of Cellulose and Synthesizing Pharmaceutical Grade Carboxymethyl Sago Cellulose from Malaysian Sago Pulp

Silver containing hydrofiber dressing promotes wound healing in paediatric patients with partial thickness burns

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