Near-infrared light-responsive hydrogels <i>via</i> peroxide-decorated MXene-initiated polymerization

Tao, Na; Zhang, Depan; Li, Xilong; Lou, Dongyang; Sun, Xiaoyi; Wei, Chuan‐Wan; Li, Juan; Yang, Junliang; Liu, You‐Nian

doi:10.1039/c9sc03917a

Cited by 80 publications

(65 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the material provides strong optical absorption in the near-IR (NIR) region with potential as a photothermal agent for tumor therapy [ 36 , 37 , 38 ]. Considering the photothermal efficiency of the nanomaterial properties of MXene, we focused on the fabrication process [ 39 ] and application of nanocomposite hydrogels possessing Ti 3 C 2 T x MXene [ 40 , 41 ] to exploit the volume shrinkage promoted by light in NIPAm-based hydrogel materials [ 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

Ti3C2Tx MXene-Based Light-Responsive Hydrogel Composite for Bendable Bilayer Photoactuator

et al. 2020

View full text Add to dashboard Cite

Soft actuators based on hydrogel materials, which can convert light energy directly into mechanical energy, are of the utmost importance, especially with enhancements in device development. However, the hunt for specific photothermal nanomaterials with distinct performance remains challenging. In this study, we successfully fabricated a bilayer hydrogel actuator consisting of an active photothermal layer from incorporated Ti3C2Tx MXene in poly(N-isopropylacrylamide) p(NIPAm)hydrogel structure and a passive layer from the N-(2-hydroxylethylpropyl)acrylamide (HEAA) hydrogel structure. The uniform and effective incorporation of MXene into the NIPAm hydrogel structures were characterized by a battery of techniques. The light responsive swelling properties of the MXene-embedded NIPAm-based hydrogel demonstrated fully reversible and repeatable behavior in the light on–off regime for up to ten consecutive cycles. The effect of MXene loading, the shape of the actuator, and the light source effects on the bilayer NIPAm-HEAA hydrogel structure were investigated. The bilayer hydrogel with MXene loading of 0.3% in the NIPAm hydrogel exhibited a 200% change of the bending angle in terms of its bidirectional shape/volume after 100 s exposure to white light at an intensity of 70 mW cm−2. Additionally, the bending behavior under real sunlight was evaluated, showing the material’s potential applicability in practical environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Ti3C2Tx MXene-Based Light-Responsive Hydrogel Composite for Bendable Bilayer Photoactuator

et al. 2020

View full text Add to dashboard Cite

show abstract

“…To date, several MXene-polymer NC hydrogels were prepared and exploited in many applications. 13,18,19,[30][31][32][33][34] Typically, the interactions between MXene nanosheets and other polymers in the hydrogel network arise from polymer chain entanglements, ionic interactions, hydrogen and/or covalent bonding. However, the role of MXene nanosheets in the gelation process of the reported MXene-polymer NC hydrogels varies substantially from noninvolvement to initiating the gelation or acting as a crosslinker.…”

Section: Mxene-polymer Nanocomposite Hydrogelsmentioning

confidence: 99%

“…Recently, Tao et al demonstrated the use of MXene nanosheets as an initiator for the polymerization and the gelation of several acrylic monomers to form different MXene-polyacrylate NC hydrogels. 32 The polymerization of a series of monomers including acrylamide, N-isopropylacrylamide (NIPAM), N,N-dimethylacrylamide (DMA), methyl methacrylate (MMA), and hydroxyethyl methacrylate (HEMA), were initiated by peroxide-decorated MXene (p-Ti 3 C 2 T x ) nanosheets. The p-Ti 3 C 2 T x nanosheets were obtained through a sonication-assisted etching process.…”

Section: Mxene-polymer Nanocomposite Hydrogelsmentioning

confidence: 99%

“…13,18 Thanks to their superior hydrophilicity, negative surface charge, rich stoichiometry, tunable surface functionality, and high-aspect-ratio nanostructures, MXenes can form hierarchically unoriented complex physical interconnections (e.g., chain entanglements, ionic interactions, and hydrogen bonding) with different polymers, leading to new gelation mechanisms of mechanically enhanced hydrogels. 13,17,29,31,32,39 In return, MXenes also benefit from the inherent properties of the host gel network, which broaden their use in many applications requiring lightweight materials, swelling/de-swelling abilities, higher mechanical, and chemical stability. It is not an overstatement that the integration of MXenes into hydrogel systems has given rise to a genuinely unique hydrogel platform.…”

Section: Fundamental Properties Of Mxenesmentioning

confidence: 99%

See 1 more Smart Citation

MXene hydrogels: fundamentals and applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In the present contribution, we focus on stimuli-responsive chemical hydrogels. Typical stimuli include variations in temperature [11], pH [11], applied stress [12], magnetic and electromagnetic field [13], ionic strength [14], light [15] and the presence of bioactive species [16]. Redox-responsive gels have been scarcely reported.…”

Section: Introductionmentioning

confidence: 99%

Application of Redox-Responsive Hydrogels Based on 2,2,6,6-Tetramethyl-1-Piperidinyloxy Methacrylate and Oligo(Ethyleneglycol) Methacrylate in Controlled Release and Catalysis

Khodeir

Vlad

2021

Polymers

View full text Add to dashboard Cite

Hydrogels have reached momentum due to their potential application in a variety of fields including their ability to deliver active molecules upon application of a specific chemical or physical stimulus and to act as easily recyclable catalysts in a green chemistry approach. In this paper, we demonstrate that the same redox-responsive hydrogels based on polymer networks containing 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) stable nitroxide radicals and oligoethylene glycol methyl ether methacrylate (OEGMA) can be successfully used either for the electrochemically triggered release of aspirin or as catalysts for the oxidation of primary alcohols into aldehydes. For the first application, we take the opportunity of the positive charges present on the oxoammonium groups of oxidized TEMPO to encapsulate negatively charged aspirin molecules. The further electrochemical reduction of oxoammonium groups into nitroxide radicals triggers the release of aspirin molecules. For the second application, our hydrogels are swelled with benzylic alcohol and tert-butyl nitrite as co-catalyst and the temperature is raised to 50 °C to start the oxidation reaction. Interestingly enough, benzaldehyde is not miscible with our hydrogels and phase-separate on top of them allowing the easy recovery of the reaction product and the recyclability of the hydrogel catalyst.

show abstract

Near-infrared light-responsive hydrogels via peroxide-decorated MXene-initiated polymerization

Abstract: Peroxide-decorated Ti3C2Tx plays a role as an initiator for free-radical polymerization and leads to new opportunities for intelligent optoelectronic devices.

Cited by 80 publications

References 65 publications

Ti3C2Tx MXene-Based Light-Responsive Hydrogel Composite for Bendable Bilayer Photoactuator

Ti3C2Tx MXene-Based Light-Responsive Hydrogel Composite for Bendable Bilayer Photoactuator

MXene hydrogels: fundamentals and applications

Application of Redox-Responsive Hydrogels Based on 2,2,6,6-Tetramethyl-1-Piperidinyloxy Methacrylate and Oligo(Ethyleneglycol) Methacrylate in Controlled Release and Catalysis

Contact Info

Product

Resources

About