Preparation of Chitin Composite Hydrogel
for Dye-Contaminated Water Treatment

Chen, Xiaoyu; Lin, Hong

doi:10.15244/pjoes/138210

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…[ 39 ] Under the crosslinked polymer network structure, all absorbed water molecules were fixed in the hydrogel interior. [ 40 ] Thus, after soaking P(AANa/AM) dried particles in solution, the final state of P(AANa/AM) particles was the swelling hydrogel, not the initial dried particles. Meanwhile, the ionization property of COONa must not be ignored in the water environment.…”

Section: Resultsmentioning

confidence: 99%

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

Wang

et al. 2023

Polymer Engineering & Sci

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To address the poor removal rate of low-concentration dye adsorption, the soaking pretreatment of hydrogel adsorbent in distilled water was suggested. In contrast to the conventional method of directly adding dried particles into dye solution, the purposed procedure involved adding an adsorbent into distilled water before transferring it into the dye solution. A hydrogel adsorbent based on P(AANa/AM) containing COONa groups was fabricated as an example for the hypothesis. The maximum adsorption capacity of P(AANa/AM) hydrogel adsorbent onto MB was 2455.45 mg/g under an initial MB concentration of 1000 mg/L. After two rounds of soaking pretreatment in distilled water, the clearance rate of 20 mg/L MB increased from 97.79% to 99.40%. Considering the hydrophilicity and ionization of COONa group, a high concentration of Na + was released into solution. Hydrogel soaked multiple times in fresh distilled water induced the continuous release of Na + into distilled water, although the swelling equilibrium was already achieved in the first soak. In dye adsorption and desorption experiments, the water absorption behavior was observed. Overall, this work revealed that the soaking pretreatment of hydrogel adsorbent in distilled water can enhance the removal rate of low concentration dye through adsorption.

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Section: Resultsmentioning

confidence: 99%

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

Wang

et al. 2023

Polymer Engineering & Sci

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“…Such a completely sustainable synthetic method allowed for the preparation of non-toxic, biocompatible, and robust hydrogels [ 62 ]. Along with other natural polymers, chitin composite hydrogels were evaluated for the effective adsorptive removal of textile dyes from water [ 63 , 64 ].…”

Section: Chitin-containing Networkmentioning

confidence: 99%

Synthesis and Applications of Hybrid Polymer Networks Based on Renewable Natural Macromolecules

Getya

Gitsov

2023

Molecules

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Macromolecules obtained from renewable natural sources are gaining increasing attention as components for a vast variety of sustainable polymer-based materials. Natural raw materials can facilitate continuous-flow production due to their year-round availability and short replenishment period. They also open new opportunities for chemists and biologists to design and create “bioreplacement” and “bioadvantaged” polymers, where complex structures produced by nature are being modified, upgraded, and utilized to create novel materials. Bio-based macromonomers are expected not only to compete with but to replace some petroleum-based analogs, as well. The development of novel sustainable materials is an ongoing and very dynamic process. There are multiple strategies for transforming natural macromolecules into sophisticated value-added products. Some methods include chemical modification of macromolecules, while others include blending several components into one new system. One of the most promising approaches for incorporating renewable macromolecules into new products is the synthesis of hybrid networks based on one or more natural components. Each one has unique characteristics, so its incorporation into a network brings new sustainable materials with properties that can be tuned according to their end-use. This article reviews the current state-of-the-art and future potential of renewable natural macromolecules as sustainable building blocks for the synthesis and use of hybrid polymer networks. The most recent advancements and applications that involve polymers, such as cellulose, chitin, alginic acid, gellan gum, lignin, and their derivatives, are discussed.

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“…Hydrogels have cross-linking polymeric network structure with hydrophilic groups (Liao et al 2022). For preparing hydrogel, alkaline solution is a solvent and a catalyst for the reaction of some cross-linkers, such as epichlorohydrin (Chen and Hong 2022). This catalytic effect allows the cross-linking reaction to occur in a mild way at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Dissolution and reaction catalysis strategy using alkaline solvent for mild fabrication of chitin composite hydrogel for dye adsorption

Chen

Mao

2022

BioRes

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As the most abundant natural amino polysaccharide, chitin remains among the least exploited polymers due to its poor solubility, which restricts its research and utilization. In this study, a new chitin composite hydrogel was prepared by a mild process at 25 °C within a short time. To enhance the adsorption capacity, sodium carboxymethyl cellulose and attapulgite were introduced into the structure of a hydrogel by chemical reaction and physical interaction, respectively. Alkaline solution was used as a solvent to dissolve chitin and used as a catalyst to accelerate the cross-linking reaction between chitin and sodium carboxymethyl cellulose. This solvent (8 wt% NaOH/6 wt% urea solution) has dual functions: to dissolve chitin and to accelerate the cross-linking reaction of chitin with carboxymethyl cellulose by epichlorohydrin. The cross-linking reaction occurred at room temperature (25 °C) within a short time (4 h). Fourier transform infrared spectroscopy (FTIR) indicated that chitin and sodium carboxymethyl cellulose has been successfully cross-linked. X-ray diffraction results showed that the cross-linked structure was amorphous and that attapulgite kept its crystal structure in the hydrogel. Scanning electron microscopy showed the coarse surface of composite hydrogel with attapulgite. The adsorption capacity for methylene blue reached 167 mg g-1.

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Preparation of Chitin Composite Hydrogel for Dye-Contaminated Water Treatment

Cited by 6 publications

References 21 publications

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

Synthesis and Applications of Hybrid Polymer Networks Based on Renewable Natural Macromolecules

Dissolution and reaction catalysis strategy using alkaline solvent for mild fabrication of chitin composite hydrogel for dye adsorption

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