UV-Cured Chitosan-Based Hydrogels Strengthened by Tannic Acid for the Removal of Copper Ions from Water

Sesia, Rossella; Ferraris, Sara; Sangermano, Marco; Spriano, Silvia Maria

doi:10.3390/polym14214645

Cited by 22 publications

(8 citation statements)

References 84 publications

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“…The recycled hydrogels were then washed with distilled water, collected, dried, and reused in subsequent adsorption cycles. This operational approach is simple, cost-effective, and outperforms other systems used for the removal of IBU and MB from water …”

Section: Resultsmentioning

confidence: 96%

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Silva,

Soares,

Nörnberg

et al. 2023

ACS Appl. Polym. Mater.

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Water and wastewater treatment face significant challenges in removing organic contaminants, and the search for efficient processes and materials is crucial to reducing this issue. Herein, the design and manufacturing of 3D-printed composite hydrogels using a combination of alginate and rice husk biochar was proposed. These composite hydrogels were evaluated as adsorbents for removing ibuprofen (IBU) and methylene blue (MB) from tap water. Various characterization techniques, including FTIR, XRD, SEM, and BET analyses, confirmed the successful formation of the composite hydrogels. Also, the properties of the composite hydrogels, such as total porosity, cross-linking density, and swelling, were found to vary with the biochar content in the composite. Batch experiments demonstrated that the hydrogel containing 10% w/w biochar (Alg/Biochar10) has significant adsorption capacities for IBU (111.4 mg/g) and MB (214.6 mg/g). These values represented substantial increases of 48% (IBU) and 58% (MB) compared to the conventional hydrogel without biochar, highlighting the enhanced performance achieved by incorporating biochar into the composite. The adsorption kinetics of both IBU and MB followed the pseudo-first-order model, while the Freundlich isotherm model provided insights into the adsorption mechanism. Notably, the adsorption of MB on the composite hydrogel was particularly favorable due to electrostatic interactions between the adsorbent and the adsorbate. Furthermore, the composite hydrogel exhibited recyclability and reusability, as demonstrated through 20 reuse cycles, indicating its stability and practical applicability. In summary, the original 3D-printed composite hydrogels manufactured with the alginate/rice husk biochar ink showed great potential as adsorbent materials for organic removal from water and wastewater.

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Section: Resultsmentioning

confidence: 96%

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Silva,

Soares,

Nörnberg

et al. 2023

ACS Appl. Polym. Mater.

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“…The composite hydrogel of methacrylated chitosan and synthesized strontium phosphosilicate [Sr 5 (PO 4 ) 2 SiO 4 ] was constructed to allow sustained and controlled release of Sr, P, and Si ions and promote the formation of amorphous calcium phosphate apatite and vascular network, demonstrating the potential as a bone filling material . The photocured chitosan-based hydrogel also showed potential as an absorbent to eliminate heavy metals from water pollutants, such as As(V), Pb(II), and Cu(II) ions. − Chitosan can also undergo methacrylation with GMA through an amine-epoxide reaction. The photo-cross-linking of synthesized products was used in the 3D bioprinting of tissue scaffold, to allow local drug delivery systems to encapsulate doxorubicin to treat thyroid cancer …”

Section: Polysaccharide-derived Photopolymersmentioning

confidence: 99%

Renewable Photopolymers: Transformation of Biomass Resources into Value-Added Products Under Light

Lai,

Zhang,

Xiao

2023

ACS Sustainable Chem. Eng.

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Light-induced cross-linking of liquid monomers has found widespread applications in various fields, such as dentistry, coatings, tissue engineering, and 3D printing. These processes typically rely on monomers derived from petrochemicals, which are volatile in price and are becoming increasingly depleted, compelling researchers to explore alternative sources from forestry and agricultural crops. The renewability of these resources makes them a promising option for developing substitutive materials with similar or superior properties. The various structural subunits in biomass offer alternative building blocks for petroleum-based photopolymers including the double bond-containing and hydrophobic fatty acids and terpenes, hydrophilic carbohydrates and proteins, aromatic furfural compounds from carbohydrates, and phenolic moieties in lignin. They can be transformed into photopolymers by the inherent or chemically introduced photocurable bonds. This review seeks to highlight recent advancements in transforming renewable platform chemicals into photocurable systems for photopolymerization processes and examines the thermomechanical properties and applications of the resulting cured materials. Furthermore, potential issues for improvement are also identified, such as the cost-effectiveness of biomass-based photopolymers and the risk in competition with food production. The perspectives on future directions for improving the renewability in this area are also given.

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“…The methacrylation reaction of medium-and low-molecular-weight chitosan, illustrated in Scheme 1, was performed following previous works reported in the literature [36,37]. ATR-FTIR spectroscopy was used to verify the occurrence of the methacrylation reaction.…”

Section: Physico-chemical Characterizationsmentioning

confidence: 99%

“…The methacrylation reaction of medium-and low-molecular-weight chitosan, illustrated in Scheme 1, was performed following previous works reported in the literature [36,37].…”

Section: Physico-chemical Characterizationsmentioning

confidence: 99%

Efficient Biorenewable Membranes in Lithium-Oxygen Batteries

et al. 2023

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Lithium-oxygen batteries, with their very high energy density (3500 Wh kg−1), could represent a real breakthrough in the envisioned strategies towards more efficient energy storage solutions for a less and less carbonated energy mix. However, the problems associated with this technology are numerous. A first one is linked to the high reactivity of the lithium metal anode, while a second one is linked to the highly oxidative environment created by the cell’s O2 saturation. Keeping in mind the necessity for greener materials in future energy storage solutions, in this work an innovative lithium protective membrane is prepared based on chitosan, a polysaccharide obtained from the deacetylation reaction of chitin. Chitosan was methacrylated through a simple, one-step reaction in water and then cross-linked by UV-induced radical polymerization. The obtained membranes were successively activated in liquid electrolyte and used as a lithium protection layer. The cells prepared with protected lithium were able to reach a higher full discharge capacity, and the chitosan’s ability to slow down degradation processes was verified by post-mortem analyses. Moreover, in long cycling conditions, the protected lithium cell performed more than 40 cycles at 0.1 mA cm−2, at a fixed capacity of 0.5 mAh cm−2, retaining 100% coulombic efficiency, which is more than twice the lifespan of the bare lithium cell.

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UV-Cured Chitosan-Based Hydrogels Strengthened by Tannic Acid for the Removal of Copper Ions from Water

Cited by 22 publications

References 84 publications

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Renewable Photopolymers: Transformation of Biomass Resources into Value-Added Products Under Light

Efficient Biorenewable Membranes in Lithium-Oxygen Batteries

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