Preparation and biological characterization of cellulose graft copolymers

Dahou, Wassila; Ghemati, Djamila; Oudia, Atika; Aliouche, Djamel

doi:10.1016/j.bej.2009.10.006

Cited by 93 publications

(41 citation statements)

References 24 publications

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“…Functional groups can be introduced into the cellulose molecules through the hydroxyl moieties. New groups break the hydrogen bonding network in the cellulose, decrease the crystallinity and increase its solubility [16][17][18][19]. Ionic liquids have been used as a reaction medium for modifying cellulose using urea, phthalic anhydride (PA), maleic anhydride (MA) and butyl glycidyl ether (BGE).…”

Section: Introductionmentioning

confidence: 99%

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

2018

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This article considers the modification of cellulose fibres with the use of vinyltrimethoxysilane and maleic anhydride as substances to improve the wettability of the additive in the hydrophobic polymer matrix. The stress is put on the possible ways of modification impact investigation and its description. Effects of the treatment are analysed using Fourier transform infrared spectroscopy, which reveal the presence of new moieties on the cellulose surface, e.g. C=C bonds, C=O and Si-C groups, while dynamic light scattering investigation revealed an increase in the hydrodynamic radii of the molecules which was maximized in the case of modification with the use of maleic anhydride. Furthermore, thermal properties were defined with differential scanning calorimetry and thermogravimetric analysis. Some variations within the process of samples thermal degradation are observed-thermal stability of the specimen modified with maleic anhydride is the highest. The presented approach of combined fibre modification analysis techniques, being a scientific novelty, allows to confirm the treatment impact on cellulose properties at many levels. Graphical abstractKeywords Cellulose · Maleic anhydride · Vinyltrimethoxysilane

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Section: Introductionmentioning

confidence: 99%

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

2018

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“…This report composed of polymeric chelating ligands which showed excellent adsorption capacity. It is not suitable to compare with other cellulose-based adsorbent due to most of the adsorbents are direct modifications without grafting and different functional groups are attached to the cellulose [1][2][3]. It is clearly indicated that the significant adsorption capabilities are achieved with this modified cellulose materials.…”

Section: Comparison Of Chelating Ligandsmentioning

confidence: 99%

“…An alternative route has been used to modify the cellulose backbone either inserting the metal binding capability or cellulose can be transformed into the grafted copolymer and then chelating ligands incorporate into the grafted copolymers [3]. The graft copolymerization can be carried out using free radical or ionic initiation method for suitable side chain grafts are covalently linked to a main chain of the cellulose backbone [3].…”

Section: Introductionmentioning

confidence: 99%

“…The free radical produced by chemical initiation process is the best choice among other radical generation methods. Thus, chemical initiation using ceric ion (Ce 4+ ) generates free radicals on the cellulose backbone resulting in the higher grafting efficiency [3]. Due to biodegradable nature, biopolymers like cellulose and its derivative has a crucial limitation for long lasting application in adsorption processes and generally cellulose-based ligands needed to recycling for cost efficient use.…”

Section: Introductionmentioning

confidence: 99%

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Efficient removal of heavy metals from electroplating wastewater using polymer ligands

Rahman

Sarkar

Yusoff

2015

Front. Environ. Sci. Eng.

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Poly(hydroxamic acid)-poly(amidoxime) chelating ligands were synthesized from poly(methyl acrylate-co-acrylonitrile) grafted acacia cellulose for removing toxic metal ions from industrial wastewaters. These ligands showed higher adsorption capacity to copper (2.80 mmol•g -1 ) at pH 6. In addition, sorption capacities to other metal ions such as iron, zinc, chromium, and nickel were also found high at pH 6. The metal ions sorption rate (t 1/2 ) was very fast. The rate of adsorption of copper, iron, zinc, chromium, nickel, cobalt, cadmium and lead were 4, 5, 7, 5, 5, 8, 9 and 11 min, respectively. Therefore, these ligands have an advantage to the metal ions removal using the column technique. We have successfully investigated the known concentration of metal ions using various parameters, which is essential for designing a fixed bed column with ligands. The wastewater from electroplating plants used in this study, having chromium, zinc, nickel, copper and iron, etc. For chromium wastewater, ICP analysis showed that the Cr removal was 99.8% and other metal ions such as Cu, Ni, Fe, Zn, Cd, Pb, Co and Mn removal were 94.7%, 99.2%, 99.9%, 99.9%, 99.5%, 99.9%, 95.6% and 97.6%, respectively. In case of cyanide wastewater, the metal removal, especially Ni and Zn removal were 96.5 and 95.2% at higher initial concentration. For acid/alkali wastewater, metal ions removing for Cd, Cr and Fe were 99.2%, 99.5% and 99.9%, respectively. Overall, these ligands are useful for metal removal by column method from industrial wastewater especially plating wastewater.

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“…As a result, using biomass resources as raw materials to design and synthesize environmentally friendly waterabsorbent resin is becoming a popular research direction . Biomass resources such as starch, cellulose, and chitosan have been used to synthesize waterabsorbent resin (Li et al 2007;Shang et al 2008;Dahou et al 2010). The heat-resistant properties of starch-based resins are poor, and they are difficult to store in water due to how easily they corrode.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylate-based Water-absorbent Hydrogels Prepared with Lignin-related Compounds: Process Conditions and Performance

et al. 2017

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Utilizing biomass resources to synthesize water-absorbent resin has attracted global interest as a new research direction. Lignin, as the second most abundant renewable biopolymer in nature, is a strong candidate for use in renewable materials. In this study, water-absorbent resins were synthesized from lignosulfonate (LS) and acrylic acid (AA) by grafting copolymerization with an aqueous solution of potassium persulfate (KPS) as the initiator and N'N-methylene-bis-acrylamide (MBA) as a crosslinking agent. The optimum process parameters of lignosulfonate-graftedpolyacrylic acid resin (LS-PAA) were obtained via a single-factor method: AA 30 wt.%, LS 2.67 wt.% (to AA), cross-linker 0.03 wt.% (to AA), initiator 0.43 wt.% (to AA), and neutralization 65%. The optimum reaction temperature was 60 °C. Although lignin is a hydrophobic polymer, it has many reactive functional groups that can react with AA. It has been expected that adding lignins can change the cross-linking density by their three-dimensional structure, thus increasing the water absorbency. The LS-PAA resins were compared to other kinds of lignin derivatives including alkali lignin, lignocresol, lignoresorcinol, and lignopyrogallol under the same reaction conditions. The results showed that changing the types of lignin can change the resulting water absorbency. Lignopyrogallol-graftedpolyacrylic acid resin (LP-PAA) showed the highest water absorbency (2137 g/g).

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Preparation and biological characterization of cellulose graft copolymers

Cited by 93 publications

References 24 publications

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Efficient removal of heavy metals from electroplating wastewater using polymer ligands

Polyacrylate-based Water-absorbent Hydrogels Prepared with Lignin-related Compounds: Process Conditions and Performance

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