Processing and modification of hydrogel and its application in emerging contaminant adsorption and in catalyst immobilization: a review

Du, Hongxue; Shi, Shuyun; Liu, Wei; Teng, Honghui; Piao, Mingyue

doi:10.1007/s11356-020-08096-6

Cited by 60 publications

(25 citation statements)

References 225 publications

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“…Superabsorbent hydrogels are broadly applied in several fields such as agriculture [3,4] wastewater treatment [5][6][7], biosensors, drug release [8], self-healing [9], tissue engineering [10], adsorbents for organic [11], inorganic pollutants [12,13], and enhanced oil recovery [14,15]. Usually, superabsorbent hydrogels based on synthetic polymers, compared with those based on natural polymers such as chitosan [16], cellulose [17], starch [18], and their substitutes, are of great interest due to their eco-friendly properties and low cost, non-toxicity, biodegradability, and highly hydrophilic network [19].…”

Section: Introductionmentioning

confidence: 99%

Biochar Grafted on CMC-Terpolymer by Green Microwave Route for Sustainable Agriculture

Elsaeed

Zaki

Ibrahim³

et al. 2021

Agriculture

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The deficiency of water sources and the environmental disposal of large amounts of biomass waste (orange peels) produces economic and environmental problems, though its conversion into biochar by a pyrolysis procedure might be used to improve soil productivity. In the current study, we investigated the performance of superabsorbent biochar composite grafted on CMC as a low-cost, alternative, and biodegradable terpolymer composite (IPNCB) for soil water retention capacity. The IPNCB composite was synthesized by both microwave and conventional routes. The optimal reaction parameters proved that the microwave route has a high grafting percentage (%G) and short reaction time compared to the conventional route. The superabsorbent composite was characterized using different methods: FTIR, TGA, and SEM. The results show that the equilibrium water swelling (EW) of the IPNCB composite was improved at a 2% biochar concentration. The incorporation of biochar (BC) into the polymer network improved the water holding capacity (WHC) to 57.6% and water retention (WR) to 9.1% after 30 days. The degradation test indicates the IPNCB composite has a good degradability rate. Mixing soil with the prepared IPNCB composite can improve plant growth and reduce water consumption through the irrigation of arid lands. The IPNCB composite is a candidate in sustainable agriculture applications.

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Section: Introductionmentioning

confidence: 99%

Biochar Grafted on CMC-Terpolymer by Green Microwave Route for Sustainable Agriculture

Elsaeed

Zaki

Ibrahim³

et al. 2021

Agriculture

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“…CMCH is dissolvable in a wide pH range with several advantages and low harmfulness [ 10 ]. CMCH not only has a good solubility in water, but also has unique chemical, physical and biologic properties such as high viscosity, large hydrodynamic volume, biocompatibility, good ability to form films, fibers and hydrogels [ 11 , 12 , 13 ]. Hence, it was widely utilized in numerous biomedical fields, for example, a moisture-retention agent, wound dressing agent, artificial bone and skin, blood anticoagulant and as a component in different drug delivery [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant and Moisturizing Properties of Carboxymethyl Chitosan with Different Molecular Weights

et al. 2020

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This research aimed to synthesize carboxymethyl chitosan (CMCH) from different molecular weights of chitosan including low MW (L, 50–190 kDa), medium MW (M, 210–300 kDa) and high MW (H, 310–375 kDa) on the antioxidant and moisturizing properties. The L-CMCH, M-CMCH and H-CMCH improved the water solubility by about 96%, 90% and 89%, respectively when compared to native chitosan. Higher MW resulted in more viscous of CMCH. For antioxidant properties, IC50 values of DPPH and ABTS radical scavenging activity for L-CMCH were 1.70 and 1.37 mg/mL, respectively. The L-CMCH had higher antioxidant properties by DPPH and ABTS radical scavenging assay and FRAP. The moisturizing properties on pig skin using a Corneometer® showed that 0.5% H-CMCH significantly presented (p ≤ 0.05) greater moisturizing effect than that of untreated-skin, distilled water, propylene glycol and pure chitosan from three molecular weights.

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“…The capacity to retain a high content of water imparts to the hydrogels the ability to swell and be soft materials stable in aqueous media [ 56 , 57 ]. The properties of the hydrogels can be easily modulated by structure modification to induce responsiveness to external stimuli [ 58 , 59 ] or sensitivity to particular analytes [ 60 ]. Hydrogels can undergo volume-phase transitions when they are exposed to a stimulus or molecular interactions with the analyte.…”

Section: Hydrogel Materials In Sensingmentioning

confidence: 99%

Shaping Macromolecules for Sensing Applications—From Polymer Hydrogels to Foldamers

et al. 2022

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Sensors are tools for detecting, recognizing, and recording signals from the surrounding environment. They provide measurable information on chemical or physical changes, and thus are widely used in diagnosis, environment monitoring, food quality checks, or process control. Polymers are versatile materials that find a broad range of applications in sensory devices for the biomedical sector and beyond. Sensory materials are expected to exhibit a measurable change of properties in the presence of an analyte or a stimulus, characterized by high sensitivity and selectivity of the signal. Signal parameters can be tuned by material features connected with the restriction of macromolecule shape by crosslinking or folding. Gels are crosslinked, three-dimensional networks that can form cavities of different sizes and forms, which can be adapted to trap particular analytes. A higher level of structural control can be achieved by foldamers, which are macromolecules that can attain well-defined conformation in solution. By increasing control over the three-dimensional structure, we can improve the selectivity of polymer materials, which is one of the crucial requirements for sensors. Here, we discuss various examples of polymer gels and foldamer-based sensor systems. We have classified and described applied polymer materials and used sensing techniques. Finally, we deliberated the necessity and potential of further exploration of the field towards the increased selectivity of sensory devices.

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Processing and modification of hydrogel and its application in emerging contaminant adsorption and in catalyst immobilization: a review

Cited by 60 publications

References 225 publications

Biochar Grafted on CMC-Terpolymer by Green Microwave Route for Sustainable Agriculture

Biochar Grafted on CMC-Terpolymer by Green Microwave Route for Sustainable Agriculture

Antioxidant and Moisturizing Properties of Carboxymethyl Chitosan with Different Molecular Weights

Shaping Macromolecules for Sensing Applications—From Polymer Hydrogels to Foldamers

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