Porous 3D network rectorite/chitosan gels: Preparation and adsorption properties

Lu, Yajing; Chang, Peter R.; Zheng, Pengwu; Ma, Xiaofei

doi:10.1016/j.clay.2015.01.020

Cited by 22 publications

(5 citation statements)

References 26 publications

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“…Recently, incorporation of clays into hydrogels has been proved to be an effective approach to enhance the hydrogels properties. ,, Strong interfacial interactions between the dispersed clay layers and the hydrogels led to enhanced mechanical, thermal, and barrier properties. Different clays, such as montmorillonite, , kaolin, diatomite, rectorite, palygorskite, sepiolite, kaolinite, vermiculite, and medicinal stone, have been used in hydrogels formation to achieve lower cost and better properties. However, little information is available on the application of carclazyte in hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Swelling and Responsive Properties of Pineapple Peel Carboxymethyl Cellulose-g-poly(acrylic acid-co-acrylamide) Superabsorbent Hydrogel by the Introduction of Carclazyte

Dai

Huang

2017

J. Agric. Food Chem.

155

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The superabsorbent hydrogels were synthesized by grafting acrylic acid and acrylamide onto pineapple peel carboxymethyl cellulose and effect of carclazyte introduction was compared. The structure and morphology of the superabsorbents were investigated by Fourier transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy. Swelling behaviors of the superabsorbents were investigated in distilled water, 0.9% NaCl solution, various salt and pH solutions, as well as surfactant solutions and simulated physiological fluids. The swelling dynamic mechanism of the superabsorbents was explained well by Fickian diffusion and Schott's pseudo-second-order models. The introduction of carclazyte effectively improved the swelling capacity of the superabsorbents in various solutions as well as its salt- and pH-sensitivity. The prepared superabsorbents also exhibited excellent sensitivities to various surfactant solutions and simulated physiological fluids, showing potential applications in the biomaterials field.

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Section: Introductionmentioning

confidence: 99%

Enhanced Swelling and Responsive Properties of Pineapple Peel Carboxymethyl Cellulose-g-poly(acrylic acid-co-acrylamide) Superabsorbent Hydrogel by the Introduction of Carclazyte

Dai

Huang

2017

J. Agric. Food Chem.

155

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“…For this good thermal and mechanical strength, another clay mineral rectorite is preferred, which is a combination of expandable montmorillonite and a non-expandable mica layer. Lu et al combined rectorite and chitosan to form a composite to adsorb methylene blue dye (∼162.6 mg/g). Also, rectorite-based nanohybrid microspheres showed promising adsorption capacity for metal ions such as Cu(II), Ni(II), and Cd(II) .…”

Section: Chitosan–clay Composites For Wastewater Treatmentmentioning

confidence: 99%

Chitosan–Clay Composites for Wastewater Treatment: A State-of-the-Art Review

et al. 2021

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In recent decades, increased domestic and industrial activities have led to the release of various pollutants into the aquatic environment. A robust and eco-friendly technique for removing these pollutants from wastewater is a crucial need. Among existing technologies, adsorption is considered to be a simple, cost-effective, and sustainable method. Recently, chitosan−clay nanocomposites have emerged because of their high abundance, ease of fabrication, and efficacy as adsorbents. Quantitatively, this particular class of composites is capable of removing ∼99% of dyes, metals, and harmful negative ions from various solutions. Also, the composite is designed to remove a maximum of ∼94% of the targeted herbicides from media under investigation. This review summarizes important information about this adsorbent in removing micropollutants from various water sources. A short overview of the chemical structure and the modification of chitosan and clay, along with their interaction within the composite matrix and with contaminants, is presented. Finally, a critical analysis of the removal performance of these composites compared with that of other industrial adsorbents is provided. Future research directions are suggested on the basis of the technological challenges faced in the industrial implementation of these materials.

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“…Use in agriculture, , wastewater treatment, − biosensors, drug release, self-healing, tissue engineering, adsorbents for organic and inorganic pollutants, , and enhanced oil recovery , are just a few of the applications for superabsorbent hydrogels. Generally, superabsorbent hydrogel based natural polymers such as chitosan, cellulose, starch, collagen, and sodium alginate and their substitutes are more interesting because of their eco-friendliness, low cost, nontoxicity, biodegradability, and high hydrophilic network .…”

Section: Introductionmentioning

confidence: 99%

“…Many research efforts have been concerned with the incorporation of inorganic clay for the preparation of superabsorbent hydrogel composites such as kaolin, bentonite, attapulgite, montmorillonite (MMT), and sodium silicate, which enhance the swelling absorbance, thermal and mechanical stability, and other properties of SAP hydrogels and generate a new class of SAP for unique applications. Bentonite (BN) is composed of aluminum silicate layered with exchangeable cations and −OH groups on the surface.…”

Section: Introductionmentioning

confidence: 99%

Response Surface Method Based Modeling and Optimization of CMC-g Terpolymer Interpenetrating Network/Bentonite Superabsorbent Composite for Enhancing Water Retention

et al. 2022

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Water shortages have become a serious issue, so the importance of developing innovative cellulose-based superabsorbent polymer (SAP) was experimentally assessed as an environmentally friendly alternative to acrylate-based SAPs for the optimization of water consumption. The development of a biodegradable superabsorbent hydrogel composite based on a graft copolymer of carboxymethyl cellulose (CMC) and mixtures of different comonomers such as an acrylamide-coacrylic acid-co-2-acrylamido-2-methylpropanesulfonic acid (Am-co-AA-co-AMPS) CMC-g-TerPoly interpenetrating network was characterized by infrared spectroscopy (FT-IR), scan electron microscopy (SEM), atomic force microscope (AFM), thermal gravimetric analysis (TGA), and swelling capacity in different aqueous media. The optimized CMC-g-(TerPoly) composite showing outstanding superabsorbance with high water retention, the ratio of constituents, temperature, and pH effect on equilibrium swelling have been optimized by using multistage response surface methodology (RSM). In distilled water (d-water), the equilibrium water absorption capacity (EW) of the synthesized composite hydrogels (SAP-IPN1) is 1200 g (d-water/1g hydrogel) which is superior to any other commercial polyacrylate SAP hydrogels, while in saline water the EW is 650 g (s-water/1g hydrogel). The performance of the SAP-IPN for water retention was evaluated by studying several swelling/deswelling cycle measurements. The prepared SAP-IPN hydrogels were found to show pH and salt solution dependence on the swelling behavior. The new SAP-IPN can work with commercial SAP, which is recommended for application as a water reservoir in arid land for irrigation for agriculture purposes.

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Porous 3D network rectorite/chitosan gels: Preparation and adsorption properties

Cited by 22 publications

References 26 publications

Enhanced Swelling and Responsive Properties of Pineapple Peel Carboxymethyl Cellulose-g-poly(acrylic acid-co-acrylamide) Superabsorbent Hydrogel by the Introduction of Carclazyte

Enhanced Swelling and Responsive Properties of Pineapple Peel Carboxymethyl Cellulose-g-poly(acrylic acid-co-acrylamide) Superabsorbent Hydrogel by the Introduction of Carclazyte

Chitosan–Clay Composites for Wastewater Treatment: A State-of-the-Art Review

Response Surface Method Based Modeling and Optimization of CMC-g Terpolymer Interpenetrating Network/Bentonite Superabsorbent Composite for Enhancing Water Retention

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