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A cellulose-reinforced eutectogel was constructed by deep eutectic solvent (DES) and cotton linter cellulose. Cellulose was dispersed in the ternary DES consisting of acrylic acid, choline chloride and AlCl 3 ·6H 2 O. The photoinitiator was then introduced into the system to in situ polymerize acrylic acid monomer to form transparent and ionic conductive eutectogels while keeping all the DES. The crosslinks formed by Al 3+ induced ionic bonds and reversible links formed by hydrogen bonds give the eutectogels high stretchability (3200 ± 200 % tensile strain), self-adhesive (52.1 kPa to glass), self-healing and good mechanical strength (670 kPa). The eutectogels were assembled into sensors and epidermal patch electrodes that demonstrated high quality human motion sensing and physiological signal detection (electrocardiogram and electromyography). This work provides a facile way to design flexible electronics for sensing., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)

• The cellulose hydrogel is modified by photocatalyst CuS@MIL-100 (Fe). • CuS@MIL-100 hybrids facilitate photothermal and photocatalysis. • The hydrogel evaporator shows an evaporation rate of 2.37 kg m−2 h−1. • The hydrogel is used for clean water production from seawater and wastewater. A hydrogel solar evaporator is constructed by depositing photocatalysts into a cellulose matrix. The photocatalyst consists of copper sulfide (CuS) and Fe-based metal–organic framework (MIL-100(Fe)), with CuS particles loaded on MIL-100(Fe). By combining CuS@MIL-100 composites into cellulose hydrogel, the hydrogel solar evaporator can be acquired. The optimal evaporator exhibits an evaporation rate of 2.37 kg m-2h−1 at 1 kW m−2, with an evaporation efficiency of 94.4%. Moreover, the composite hydrogel can produce clean water from wastewater by coupling photothermal effects and photocatalytic degradation. The composite hydrogel exhibits a photocatalytic degradation efficiency of 97.3% for methylene blue (a typical dye contaminant) and 93.3% for tetracycline (a typical antibiotic). This work provides ideas for designing and manufacturing the next-generation of solar-powered water purification systems. [ABSTRACT FROM AUTHOR]

In this work, Amine-functionalized CNF/UiO-66 (CNF–NH 2 /UiO-66) composite membranes were fabricated by incorporating UiO-66 nanoparticles in the CNF–NH 2 matrix. The CO 2 -facilitated transfer channels can be constructed in the CNF–NH 2 /UiO-66 composite membrane. As a natural polymer material, CNF–NH 2 would absorb water and form a gel-like structure under humidification. The adsorbed water can convert CO 2 into bicarbonate ions (HCO 3 −) through the catalysis of amino groups on CNF–NH 2. Moreover, in CNF–NH 2 /UiO-66 composite membranes, HCO 3 − could quickly migrate to the permeate side promoted by the porous UiO-66, facilitating CO 2 transport. The optimum membrane gave a CO 2 permeability of 257.0 Barrer with a CO 2 /CH 4 ideal selectivity of 71.3. [Display omitted] • Hydrogel material CNF–NH 2 was selected as membrane matrix for gas separation. • Adsorbed water molecules can act as fast moving carriers of CO 2. • Porous UiO-66 was incorporated in CNF–NH 2 matrix as a highway for CO 2 transport. • Significantly higher CO 2 permeability was observed for membranes in a humid state. [ABSTRACT FROM AUTHOR]