Thermo-sensitive hydrogels for forward osmosis with NIR light-induced freshwater recovery

Xu, Xiang; Li, Haihui; Cheng, Jiannan; Zhang, Lifen; Cheng, Zhenping

doi:10.1039/d2py01234k

Cited by 5 publications

(3 citation statements)

References 55 publications

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“…This indicates the successful grafting of the temperature-sensitive monomer NIPAM. However, the newly appeared stretching vibration of −COO– at 1458 cm –1 of croconaine indicates the successful introduction of croconaine . The spectrograms of P-ICA after adsorption of Dy(III) showed no significant change from the preadsorption period except for the shift of the absorption peaks, which suggests that after the photothermal response regeneration, the molecular structure and chemical composition of the aerogel material were not destroyed.…”

Section: Resultsmentioning

confidence: 99%

Photothermal Switchable Cellulose Nanocrystals-Graphene Oxide Ionic Imprinted Aerogel for Selective Adsorption and Controlled Desorption of Dysprosium Ions

Xu,

Zheng,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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Section: Resultsmentioning

confidence: 99%

Photothermal Switchable Cellulose Nanocrystals-Graphene Oxide Ionic Imprinted Aerogel for Selective Adsorption and Controlled Desorption of Dysprosium Ions

Xu,

Zheng,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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“…Recently, a successful application of this photothermal system involved doping NIR‐absorbing dyes into silica nanoparticles as photosensitizers for the fabrication of thermosensitive hydrogels. [ 82 ] In this process, temperature‐sensitive monomers, including an ionic liquid monomer (TVBP), N ‐isopropylacrylamide (NIPAM), and diacrylate containing poly(propylene glycol), were successfully copolymerized along with the crosslinker for the preparation of hydrogels. Notably, the ionic liquid monomer TVBP can generate relatively high osmotic pressure, allowing the hydrogels to draw fresh water from brackish water through a semipermeable membrane.…”

Section: Mechanisms Of Nir‐rdrpmentioning

confidence: 99%

Near‐Infrared Light‐Induced Reversible Deactivation Radical Polymerization: Expanding Frontiers in Photopolymerization

Wu,

Boyer

2023

Advanced Science

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Photoinduced reversible deactivation radical polymerization (photo‐RDRP) or photoinduced controlled/living radical polymerization has emerged as a versatile and powerful technique for preparing functional and advanced polymer materials under mild conditions by harnessing light energy. While UV and visible light (λ = 400–700 nm) are extensively employed in photo‐RDRP, the utilization of near‐infrared (NIR) wavelengths (λ = 700–2500 nm) beyond the visible region remains relatively unexplored. NIR light possesses unique properties, including enhanced light penetration, reduced light scattering, and low biomolecule absorption, thereby providing opportunities for applying photo‐RDRP in the fields of manufacturing and medicine. This comprehensive review categorizes all known NIR light‐induced RDRP (NIR‐RDRP) systems into four mechanism‐based types: mediation by upconversion nanoparticles, mediation by photocatalysts, photothermal conversion, and two‐photon absorption. The distinct photoinitiation pathways associated with each mechanism are discussed. Furthermore, this review highlights the diverse applications of NIR‐RDRP reported to date, including 3D printing, polymer brush fabrication, drug delivery, nanoparticle synthesis, and hydrogel formation. By presenting these applications, the review underscores the exceptional capabilities of NIR‐RDRP and offers guidance for developing high‐performance and versatile photopolymerization systems. Exploiting the unique properties of NIR light unlocks new opportunities for synthesizing functional and advanced polymer materials.

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“…Furthermore, PCs with NIR absorption are usually expensive, difficult to synthesize and poor solubility in common solvents. Generally, upconversion and photothermal conversion are other two strategies mainly adopted to realize the behavior of polymerization by converting low-energy NIR light into high-energy heat or photons. − However, these protocols would weaken the advantages of NIR light in terms of safety and spatiotemporal control. Therefore, the selection of PIs that could be activated easily by NIR light with uncontaminated catalysts is the most rewarding also challenging too.…”

Section: Introductionmentioning

confidence: 99%

Persistent Radical Anions: Efficient Catalysts for Iodine-Mediated Reversible-Deactivation Radical Polymerization Driven by NIR LED Light

Zhao

Bian

et al. 2023

Macromolecules

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Developing new catalysts with obvious advantages than existing ones is charming but very challenging for near infrared (NIR)photocontrolled reversible-deactivation radical polymerization (RDRP). Herein, a high-efficiency NIR-photocontrolled bromine-iodine transformation RDRP (BIT-RDRP) system was developed by employing persistent radical anions (PRAs) as the catalysts. Specifically, some inherent electron deficient species, such as 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA), can be reduced to PRAs in the presence of common reducing agents (e.g., sodium ascorbate (SA)). Subsequently, the electron-donating PRAs activate the carbon-halogen bonds of dormant species with the help of NIR light and facilitate the formation of carbon-centered radicals (CCRs) to initiate polymerizations. With the assistance of this catalytic system, a monomer conversion of more than 97.0% was achieved within 180−240 min and the polymerization process was still controllable. In addition, several other types of PRA catalysts have also been developed for confirming the catalytic mechanism. All PRAs exhibit highly catalytic ability in the BIT-RDRP system, which opens up a direction for the further development of NIR-photocontrolled RDRP.

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Thermo-sensitive hydrogels for forward osmosis with NIR light-induced freshwater recovery

Abstract: We report a near-infrared light-responsive hydrogel material consisting of two parts of monomer, ionic liquid monomer (TVBP) and N-isopropylacrylamide (NIPAM), whose crosslinker is a diacrylate containing poly(propylene glycol), all three...

Cited by 5 publications

References 55 publications

Photothermal Switchable Cellulose Nanocrystals-Graphene Oxide Ionic Imprinted Aerogel for Selective Adsorption and Controlled Desorption of Dysprosium Ions

Photothermal Switchable Cellulose Nanocrystals-Graphene Oxide Ionic Imprinted Aerogel for Selective Adsorption and Controlled Desorption of Dysprosium Ions

Near‐Infrared Light‐Induced Reversible Deactivation Radical Polymerization: Expanding Frontiers in Photopolymerization

Persistent Radical Anions: Efficient Catalysts for Iodine-Mediated Reversible-Deactivation Radical Polymerization Driven by NIR LED Light

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