Synthesis and application of cationized cellulose for adsorption of anionic dyes

Mhlongo, Jessica Tsakani; Dlamini, Mbongiseni Lungelo; Nuapia, Yannick; Etale, Anita

doi:10.1016/j.matpr.2022.02.100

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…Modifying nanocellulose surfaces with cationic groups allows for the adsorption of a broad range of negatively charged contaminants including anionic dyes, 186 pharmaceutical drugs, 187 pesticides, 188 chromates, 189 and other anions (phosphates, nitrates, and sulfates). 190 Different methods and a variety of cationization agents have been reported, with varying degrees of success.…”

Section: Cationizationmentioning

confidence: 99%

“…In contrast, quaternary ammonium compounds (QACs) 193 are positively charged over a wide pH range, e.g., 3−8, and are, therefore, more attractive for cationic functionalization. QACs reported in the literature for functionalization of nanocellulose include Girard's reagent T ((2-hydrazinyl-2-oxoethyl)trimethylazanium chloride), 194,195 epoxy-propyltrimethylammonium chloride (EPTMAC), 196,197 glycidyltrimethylammonium chloride, 186,189,190,198 imidazolium, 199 aminoguanidine, 200,201 pyridinium, 202 and a deep eutectic solvents made from aminoguanidine hydrochloride and glycerol 203 or boric acid and glycidyl trimethylammonium chloride. 204 In water treatment applications, cationic nanocellulose is attractive because it offers ease of adsorbent recovery after adsorption.…”

Section: Cationizationmentioning

confidence: 99%

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Cellulose: A Review of Water Interactions, Applications in Composites, and Water Treatment

et al. 2023

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Cellulose is known to interact well with water, but is insoluble in it. Many polysaccharides such as cellulose are known to have significant hydrogen bond networks joining the molecular chains, and yet they are recalcitrant to aqueous solvents. This review charts the interaction of cellulose with water but with emphasis on the formation of both natural and synthetic fiber composites. Covering studies concerning the interaction of water with wood, the biosynthesis of cellulose in the cell wall, to its dispersion in aqueous suspensions and ultimately in water filtration and fiber-based composite materials this review explores water−cellulose interactions and how they can be exploited for synthetic and natural composites. The suggestion that cellulose is amphiphilic is critically reviewed, with relevance to its processing. Building on this, progress made in using various charged and modified forms of nanocellulose to stabilize oil−water emulsions is addressed. The role of water in the aqueous formation of chiral nematic liquid crystals, and subsequently when dried into composite films is covered. The review will also address the use of cellulose as an aid to water filtration as one area where interactions can be used effectively to prosper human life.

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Section: Cationizationmentioning

confidence: 99%

Section: Cationizationmentioning

confidence: 99%

Cellulose: A Review of Water Interactions, Applications in Composites, and Water Treatment

et al. 2023

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“…This type of hysteresis loop indicates the formation of mesoporous materials. [ 42 ] The surface area of TiP is more than the PPy responsible for to increase in the adsorption sites of TiP/PPy nanocomposite over bare PPy. The pore diameters of the material are less than 50 nm further confirming the formation of mesoporous material.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of titanium phosphate/polypyrrole nanocomposites for removal of methyl orange from water

Gupta

Ben

2022

Polymer Composites

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In this paper, titanium (IV) phosphate (TiP), polypyrrole (PPy), and titanium (IV) phosphate-polypyrrole (TiP/PPy) nanocomposites were synthesized for adsorption of methyl orange (MO) dye from water. X-ray diffraction data showed the formation of pure samples with crystallite size 14.1 and 14.2 nm of TiP and TiP/PPy nanocomposite respectively. The specific surface area of TiP (77.127 m 2 g À1 ) was higher than PPy (17.004 m 2 g À1 ) and TiP/PPy nanocomposite (25.247 m 2 g À1 ). The equilibrium adsorption capacity (q e ) was found to be 9.801 and 30.69 mg g À1 for PPy and TiP/PPy nanocomposite respectively. The Langmuir model was successfully fitted, and the TiP/PPy nanocomposite (69.4 mg g À1 ) had a greater maximum adsorption capacity (q m ) than PPy (51.9 mg g À1 ). The MO adsorption removal efficiency was dependent on the pH of the solution and was found to be 86.7% and 30.7% for TiP/PPy nanocomposite and PPy respectively at pH 4. Thermodynamics studied confirmed the spontaneous and exothermic nature of the adsorption process. The presence of common ions decreased MO adsorption capacity and the maximum decrease was found for sodium carbonate. Electrostatic interaction, π-π stacking, and hydrogen bonding were responsible for adsorption of MO dye on the TiP/PPy nanocomposite and PPy.

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“…Adsorption Capacity (mg Modified cellulose adsorbents [24] CI Reactive Blue 21 dye: 2 Cellulose derivative [25] MB: 135 MMCNF-PNA-2 (this work) MB: 192 Cationized cellulose [26] Methyl orange (MO): 76 Porous microcrystalline cellulose [27] MB: 82…”

Section: Materials Reportedmentioning

confidence: 99%

Preparation and Application of Responsive Nanocellulose Composites

Zhou,

Zhang,

2024

Polymers

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Cellulose nanofibrils/poly(N-Isopropylacrylamide) semi-interpenetrating networks (MMCNF-PNAs) were synthesized using an in situ fabrication (semi-IPN). The polymerization of N-isopropylacrylamide (NIPAM) (free radical) was conducted in the presence of magnetic modified cellulose nanofibrils (MMCNFs). The adsorption behaviors and surface morphology of the synthesized adsorbents were investigated systematically. The adsorption behaviors of the as-prepared MMCNF-PNA towards methylene blue (MB, as the model contaminant) dye was studied, and the optimal adsorption conditions were also studied. The adsorption processes could be well fitted using pseudo-second-order and Elovich kinetic models. Meanwhile, Langmuir and Freundlich isotherm models were used to fit the adsorption which occurred at 25, 37 and 65 °C. The corresponding results showed that the Freundlich isotherm model fitted the adsorption process better, indicating that the dye’s adsorption happened via heterogeneous adsorptive energies on the prepared MMCNF-PNAs. Their desorption and reusability were also studied to verify magnetic responsivity. To sum up, MMCNF-PNAs are promising magnetic and thermal stimuli-responsive adsorbents, showing a controlled adsorption/desorption process.

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Synthesis and application of cationized cellulose for adsorption of anionic dyes

Cited by 11 publications

References 30 publications

Cellulose: A Review of Water Interactions, Applications in Composites, and Water Treatment

Cellulose: A Review of Water Interactions, Applications in Composites, and Water Treatment

Synthesis of titanium phosphate/polypyrrole nanocomposites for removal of methyl orange from water

Preparation and Application of Responsive Nanocellulose Composites

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