pH-responsive ampholytic regenerated cellulose hydrogel integrated with carrageenan and chitosan

Armir, Nur Amira Zainul; Salleh, Kushairi Mohd; Zulkifli, A.; Zakaria, Sarani

doi:10.1016/j.indcrop.2022.114588

Cited by 16 publications

(5 citation statements)

References 74 publications

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“…Swelling ratio is the capacity of the dried material to absorb water, which is one of the most important parameters for hydrogel applications 62 . Table 2 presents the swelling ratio of the cross-linked cellulose hydrogels with borax.…”

Section: Resultsmentioning

confidence: 99%

“…The uncross-linked cellulose hydrogels (B0) presented the swelling ratio of 325.2%, which was higher than that of poly(vinyl alcohol) hydrogels prepared using a freeze–thaw approach 63 . This higher swelling ratio was attributed to hydroxyl groups on cellulose surfaces which attracted water into the hydrogels 62 . The swelling ratio significantly increased to 553.1% with the introduction of borax.…”

Section: Resultsmentioning

confidence: 99%

“…When hydrogels are stimulated by temperature, pH, ionic strength, magnetic field, and radiation, the hydrogel materials would either swell or shrink 66 , 67 . For example, an increase or decrease in the electrostatic repulsion between polymer chains occurs with a change in environmental pH, resulting in a swell or shrink characteristic of hydrogels 62 . It was reported that the cellulose hydrogels followed the second-order swelling kinetics 62 , 68 , 69 .…”

Section: Resultsmentioning

confidence: 99%

“…For example, an increase or decrease in the electrostatic repulsion between polymer chains occurs with a change in environmental pH, resulting in a swell or shrink characteristic of hydrogels 62 . It was reported that the cellulose hydrogels followed the second-order swelling kinetics 62 , 68 , 69 . In the initial swelling stage, the hydrogen bonding formed between adjacent cellulose chains limited the swelling of the cellulose networks.…”

Section: Resultsmentioning

confidence: 99%

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Superabsorbent cellulose-based hydrogels cross-liked with borax

Tanpichai

Phoothong

Boonmahitthisud

2022

Sci Rep

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Cellulose, the most abundant biopolymer on Earth, has been widely attracted owing to availability, intoxicity, and biodegradability. Environmentally friendly hydrogels were successfully prepared from water hyacinth-extracted cellulose using a dissolution approach with sodium hydroxide and urea, and sodium tetraborate decahydrate (borax) was used to generate cross-linking between hydroxyl groups of cellulose chains. The incorporation of borax could provide the superabsorbent feature into the cellulose hydrogels. The uncross-linked cellulose hydrogels had a swelling ratio of 325%, while the swelling ratio of the cross-linked hydrogels could achieve ~ 900%. With increasing borax concentrations, gel fraction of the cross-linked hydrogels increased considerably. Borax also formed char on cellulose surfaces and generated water with direct contact with flame, resulting in flame ignition and propagation delay. Moreover, the cross-linked cellulose-based hydrogels showed antibacterial activity for gram-positive bacteria (S. aureus). The superabsorbent cross-linked cellulose-based hydrogels prepared in this work could possibly be used for wound dressing, agricultural, and flame retardant coating applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Superabsorbent cellulose-based hydrogels cross-liked with borax

Tanpichai

Phoothong

Boonmahitthisud

2022

Sci Rep

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“…Hydrogels absorb water according to their functional group, state of water, and cross-linking network density. Furthermore, they exhibit osmotic pressure and possess hydrophilic hydroxyl (-OH), amide (-NH 2 ), carboxyl (-COOH), and sulfonic acid (-SO 3 H) groups in their polymer networks [19]. For the removal of toxic metal ions, these functional groups can be utilized in hydrogel networks.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb2+ Ions from Aqueous Solution onto Porous Kappa-Carrageenan/Cellulose Hydrogels: Isotherm and Kinetics Study

Kalaiselvi¹,

Mohandoss

Ahmad

et al. 2023

Sustainability

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Heavy metal ion pollution poses severe health risks. In this study, a kappa-carrageenan/cellulose (κ-CG/CL) hydrogel was prepared using a facile one-step method to remove Pb2+ ions from aqueous solutions. The functional groups and crystallinity nature of κ-CG/CL hydrogel have been identified via Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). In contrast, the porous morphology and size distribution on the surface of κ-CG/CL hydrogel with a pore size of 1–10 μm were identified using scanning electron microscope (SEM) and Brunauer–Emmett–Teller (BET) surface area analysis. The as-prepared κ-CG/CL hydrogel effectively removed Pb2+ ions, primary environmental pollutants. The effects of pH and contact time on Pb2+ adsorption were studied along with the adsorption isotherms and kinetics of Pb2+ adsorption onto the hydrogels from aqueous solutions. Notably, the aqueous solutions were effectively treated with the prepared κ-CG/CL hydrogels to remove Pb2+ ions. The adsorption results fit well with pseudo-first- and second-order kinetic, Elovich, intra-particle diffusion, and Langmuir and Freundlich isotherm models. Based on the fitting results, the maximum adsorption capacity was obtained with the Freundlich isotherm model of κ-CG/CL hydrogel found to be 486 ± 28.5 mg/g (79%). Reusability studies revealed that the κ-CG/CL hydrogel could remove Pb2+ ions with more than 79% removal efficiency after eight adsorption–desorption cycles. In addition, its mechanism for efficiently adsorbing and removal of Pb2+ ions was analyzed. These findings imply that the κ-CG/CL hydrogel has substantial potential for application in removing and recycling heavy metal ions from aqueous solutions.

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Polysaccharides for Medical Technology: Properties and Applications

Sukhavattanakul

Pisitsak

Ummartyotin

et al. 2022

Macromolecular Bioscience

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Over the past decade, the use of polysaccharides has gained tremendous attention in the field of medical technology. They have been applied in various sectors such as tissue engineering, drug delivery system, face mask, and bio‐sensing. This review article provides an overview and background of polysaccharides for biomedical uses. Different types of polysaccharides, for example, cellulose and its derivatives, chitin and chitosan, hyaluronic acid, alginate, and pectin are presented. They are fabricated in various forms such as hydrogels, nanoparticles, membranes, and as porous mediums. Successful development and improvement of polysaccharide‐based materials will effectively help users to enhance their quality of personal health, decrease cost, and eventually increase the quality of life with respect to sustainability.

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pH-responsive ampholytic regenerated cellulose hydrogel integrated with carrageenan and chitosan

Cited by 16 publications

References 74 publications

Superabsorbent cellulose-based hydrogels cross-liked with borax

Superabsorbent cellulose-based hydrogels cross-liked with borax

Adsorption of Pb2+ Ions from Aqueous Solution onto Porous Kappa-Carrageenan/Cellulose Hydrogels: Isotherm and Kinetics Study

Polysaccharides for Medical Technology: Properties and Applications

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