Polyvinyl Alcohol (PVA)-Based Hydrogels: Recent Progress in Fabrication, Properties, and Multifunctional Applications

Polymers, Год журнала: 2024, Номер 16(19), С. 2755 - 2755

Опубликована: Сен. 29, 2024

Polyvinyl alcohol (PVA)-based hydrogels have attracted significant attention due to their excellent biocompatibility, tunable mechanical properties, and ability form stable three-dimensional networks. This comprehensive review explores the recent advancements in PVA-based hydrogels, focusing on unique fabrication strategies, multifunctional applications. Firstly, it discusses various facile synthesis techniques, including freeze/thaw cycles, chemical cross-linking, enhancement which led enhanced strength, elasticity, responsiveness external stimuli. These improvements expanded applicability of critical areas such as biomedical, environmental treatment, flexible electronics, civil engineering, well other emerging Additionally, integration smart functionalities, self-healing capabilities multi-responsiveness, is also examined. Despite progress, challenges remain, optimizing stability under varying conditions addressing potential toxicity cross-linkers. The concludes by outlining future perspectives, emphasizing fields like regenerative medicine, sustainability, advanced manufacturing. It underscores importance interdisciplinary collaboration realizing full these versatile materials address pressing societal challenges.

Язык: Английский

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Efficient Removal of Cadmium (Cd²⁺) from Aqueous Solutions by Chitosan@fig Branch Biochar: Adsorption Performance and Enhanced Complexation

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Фев. 7, 2025

In this study, fig branch biochar (FBB) was modified by chitosan to improve the Cd2+ adsorption performance from an aqueous solution. The surface area, pores, and functional groups of chitosan-modified (CMFBB) were characterized DTG-TGA, BET, SEM-EDS, FTIR, XRD. addition, impact various conditions on Cd analyzed, including dosage, initial pH, concentration, temperature, reaction time, coexisting cations. kinetics, isotherms, practical applications also investigated. Under optimized pH 6, adsorbent dose 2 g L-1, time 90 min, concentration 100 mg 25 °C, capacity 62.25 g-1, representing a 78.26% increase compared FBB. data for CMFBB found be well-described pseudo-second-order kinetic Langmuir isothermal models, indicating that monolayer chemical process occurred. spontaneous endothermic process, cations exerted negligible influence process. After five adsorption-desorption cycles, maintained efficiency 92.3%, demonstrating excellent regeneration capability. quantification mechanisms suggested physical adsorption, cation exchange, precipitation, complexation, π-π interactions accounted 3.70, 2.50, 33.04, 58.76, 2.0% total adsorbed in CMFBB, respectively. Compared with FBB, level increased 26.52% complexation. This work implies has great potential as effective absorbent treating polluted water.

Язык: Английский

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Resource utilization of tea waste in biochar and other areas: Current status, challenges and future prospects

Journal of Environmental Management, Год журнала: 2025, Номер 377, С. 124569 - 124569

Опубликована: Фев. 20, 2025

Язык: Английский

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Functionalization of biochar using SDS/SAP nanomicelles enhanced its immobilization capacity for dyes and heavy metals in water

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Фев. 28, 2025

To enhance the adsorption capacity of biochar (BC), herein a novel multifunction modified (SDMBC) was prepared by directly crosslinking nanomicelle sodium dodecyl sulfate/sapindus-saponin (SDS/SAP) composite system onto BC through simple, environmental friendly approach. Result showed that performance SDMBC has been greatly improved, compared with or using alone SDS and SAP, ability increased 48.83%, 29.50%, 36.44%, respectively, best effect appeared when concentration SAP to 0.8 CMC. exhibited high abilities 130.23, 108.43, 277.09 125.27, 112.78 mg/g for heavy metal ions lead Pb(II), Cadmium Cd(II) organic pollutants different chemical properties bisphenol A(BPA), Methylene blue (MB), P-nitrophenol (PNP), higher than most previously reported adsorbents, importantly, can still efficient removal capabilities even in binary competition. Subsequently, characterized Fourier Transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), Zeta potential (Zeta), it found more layered structure, richer functional groups amorphous structure BC, which are closely related improving its capacity. The behavior MB show process be spontaneous, propitious, endothermic, isotherms fitted Freundlich models well, pseudo-second-order describes kinetics adsorption, suggesting is multi-layer adsorption. little affected ionic strength coexisting substances, could remained rate over wide pH range, keep rates after 5 reuses. Based on FT-IR analysis, plausible mechanism proposed, including hydrogen bond, electrostatic attraction π-π bonding. Cost analysis manifests efficiency cheap eco-adsorbents commercial activated carbon, dosage required 99% fixed amount volumes effluent predicted. Seven machine learning (ML) were used predict (60 mg/L) SDMBC, Shapley Additive Explanations (SHAP) model interpretation. Finding Extreme Gradient Boosting (XGBoost) performance, order feature importance as time> Ratio> pH> concentration> temperature. Thus, new eco-adsorbents, effectively remove various types pollutants, great application sewage treatment, while accurate ML prediction presented valuable advice designing adsorbents optimization operating conditions future.

Язык: Английский

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Adsorption behaviors and mechanisms of porous polyvinyl alcohol/xanthan gum hydrogel for methylene blue and Pb2+

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(5), С. 113461 - 113461

Опубликована: Июль 1, 2024

Язык: Английский

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Facile removal of sulfamethoxazole antibiotic from contaminated water using bagasse-derived pyrolytic biocarbon: Parametric assessment, mechanistic insights and scale-up analysis

Journal of Water Process Engineering, Год журнала: 2024, Номер 60, С. 105110 - 105110

Опубликована: Март 14, 2024

Язык: Английский

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Highly efficient removal of Pb2+ and Cd2+ on MgAl-LDH modified with carbon dots, citric acid and amino silane: Kinetic, isothermal and mechanistic studies

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(5), С. 113601 - 113601

Опубликована: Июль 23, 2024

Язык: Английский

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Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions

Nanomaterials, Год журнала: 2025, Номер 15(2), С. 136 - 136

Опубликована: Янв. 17, 2025

We successfully synthesize monodisperse sulfhydryl-modified mesoporous organosilica nanospheres (MONs-SH) via one-step hydrolytic condensation, where cetyltrimethylammonium chloride and dodecyl sulfobetaine are employed as dual-template agents with (3-mercaptopropyl)triethoxysilane 1,2-bis(triethoxysilyl)ethane the precursors concentrated ammonia alkaline catalyst. The prepared MONs-SHs deliver a large specific surface area (729.15 m2 g-1), excellent monodispersity, homogeneous particle size. introduction of ethanol into reaction systems could expand size synthesized MONs-SH materials from 18 to 182 nm. Moreover, successful modification -SH groups endowed an adsorption capacity (297.12 mg g-1) for Pb2+ ions in aqueous solution through ion exchange complexation function. In addition, established isotherm model kinetic analyses reveal that on follows secondary models, both physisorption chemisorption contribute ions. favorable recyclability is demonstrated maintained efficiency 85.35% after six cycles. results suggest exhibit considerable application prospects effectively eliminating solutions.

Язык: Английский

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Tailored glutamine modified nanozeolite-Y/xanthan gum composite based on rice straw for enhanced adsorption of cadmium ions from aqueous media

Process Safety and Environmental Protection, Год журнала: 2025, Номер unknown, С. 106965 - 106965

Опубликована: Фев. 1, 2025

Язык: Английский

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The effect of pyrolysis temperature on the structure and uranium separation characteristics of kaolin

Surfaces and Interfaces, Год журнала: 2025, Номер unknown, С. 106177 - 106177

Опубликована: Март 1, 2025

Язык: Английский

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