Energy-saving thermochromic smart shield based on double network hydrogel with intelligent light management and robust mechanical property

Zheng, Letian; Zhang, Jiajie; Hua, Huanyao; Wu, Zhujian; Wang, Lian; Li, Yongjin

doi:10.1016/j.coco.2023.101684

Cited by 12 publications

(7 citation statements)

References 34 publications

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“…Conventional thermochromic hydrogels usually have poor mechanical strength due to shrinkage and rupture of networks during the phase transition. 134–137 Many strategies based on ionic interactions, 117 double networks, 138 supramolecular assembly, 116 hydrogen bonding, 115 etc. , have been developed to improve the strength, toughness, and self-healing of thermochromic hydrogels.…”

Section: Thermochromic Smart Windows For Solar Modulationmentioning

confidence: 99%

“…Zheng et al reported a double-network hydrogel by incorporating PNIPAM-PAA microgels into a PAAM matrix for thermochromic smart windows, forming interpenetrating networks. 138 PNIPAM-PAA microgels prevent crack propagation, and the PAAM matrix serves as a sacrificial network to dissipate energy (Fig. 11b).…”

Section: Thermochromic Smart Windows For Solar Modulationmentioning

confidence: 99%

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Multifunctional thermochromic smart windows for building energy saving

Wang,

Chen,

2024

J. Mater. Chem. A

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Section: Thermochromic Smart Windows For Solar Modulationmentioning

confidence: 99%

Section: Thermochromic Smart Windows For Solar Modulationmentioning

confidence: 99%

Multifunctional thermochromic smart windows for building energy saving

Wang,

Chen,

2024

J. Mater. Chem. A

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“…[84,197,198]. (b) Microgel-based systems intelligently adjust sunlight penetration, and user-controlled windows provide privacy [83,[199][200][201]. [84,197,198].…”

Section: Coating and Smart Window Systems Applicationsmentioning

confidence: 99%

Thermochromic Polymer Nanocomposites for the Heat Detection System: Recent Progress on Properties, Applications, and Challenges

Supian,

Asyraf,

Syamsir

et al. 2024

Polymers

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Reversible thermochromic polymers have emerged as compelling candidates in recent years, captivating attention for their application in heat detection systems. This comprehensive review navigates through the multifaceted landscape, intricately exploring both the virtues and hurdles inherent in their integration within these systems. Their innate capacity to change colour in response to temperature fluctuations renders reversible thermochromic nanocomposites promising assets for heat detection technologies. However, despite their inherent potential, certain barriers hinder their widespread adoption. Factors such as a restricted colour spectrum, reliance on external triggers, and cost considerations have restrained their pervasive use. For instance, these polymer-based materials exhibit utility in the domain of building insulation, where their colour-changing ability serves as a beacon, flagging areas of heat loss or inadequate insulation, thus alerting building managers and homeowners to potential energy inefficiencies. Nevertheless, the limited range of discernible colours may impede precise temperature differentiation. Additionally, dependency on external stimuli, such as electricity or UV light, can complicate implementation and inflate costs. Realising the full potential of these polymer-based materials in heat detection systems necessitates addressing these challenges head-on. Continuous research endeavours aimed at augmenting colour diversity and diminishing reliance on external stimuli offer promising avenues to enhance their efficacy. Hence, this review aims to delve into the intricate nuances surrounding reversible thermochromic nanocomposites, highlighting their transformative potential in heat detection and sensing. By exploring their mechanisms, properties, and current applications, this manuscript endeavours to shed light on their significance, providing insights crucial for further research and potential applications.

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“…groups and water molecules, leading to the excellent solvent affinity of the molecular chains of PNIPAM. 37 When the temperature exceeds the LCST, however, the enhanced hydrophobicity of the isopropyl group leads to the expulsion of water molecules as well as the change of polymer chains from a loose structure to an aggregated state. The successful development of actuators based on PNIPAM-contained responsive hydrogels provides valuable insights for the design and construction of BSRs, presenting opportunities for further advancements in this field.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, smart hydrogels exhibit remarkable responsiveness to a variety of stimuli, such as light, temperature, , humidity, pH, electric field, and magnetic field. − The employment of light as a wireless and spatiotemporally precise remote control, facilitating the deformation of thermally responsive hydrogels through photothermal conversion, has been shown to be an encouraging approach. , Carbon-based nanomaterials are widely sourced and biocompatible while having high light absorption and photothermal conversion efficiency. − Poly( N -isopropylacrylamide) (PNIPAM) as a thermosensitive material, when coupled with photothermal nanomaterials, offers a viable strategy for fabricating hydrogels capable of photothermal response with improved mechanical properties. Below the lower critical solution temperature (LCST) of PNIPAM, strong hydrogen bonding occurs between the hydrophilic amide groups and water molecules, leading to the excellent solvent affinity of the molecular chains of PNIPAM . When the temperature exceeds the LCST, however, the enhanced hydrophobicity of the isopropyl group leads to the expulsion of water molecules as well as the change of polymer chains from a loose structure to an aggregated state.…”

Section: Introductionmentioning

confidence: 99%

4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response

Xia,

Meng,

Qin

et al. 2024

ACS Appl. Polym. Mater.

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Inspired by natural organisms, a four-dimensional (4D)-printed starfish-like bionic soft robot (SBSR) was effectively prepared by integrating three-dimensional (3D) printing with smart hydrogels. The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior mechanical properties. In addition, the enhanced photothermal conversion effect was obtained by the reduction of graphene oxide nanosheets after the 3D printing process. Cylindrical actuators prepared using rGO-PNH exhibited bending and orientation toward the light source within 20 s of exposure to near-infrared light, thus demonstrating the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed SBSR showcased effective grasping, lifting, and releasing of objects by mimicking the predatory behavior of starfish. This study would provide insights into the development of responsive materials in 4D printable bionic soft robots and their applications in areas such as biomimetic devices and artificial muscles.

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Energy-saving thermochromic smart shield based on double network hydrogel with intelligent light management and robust mechanical property

Cited by 12 publications

References 34 publications

Multifunctional thermochromic smart windows for building energy saving

Multifunctional thermochromic smart windows for building energy saving

Thermochromic Polymer Nanocomposites for the Heat Detection System: Recent Progress on Properties, Applications, and Challenges

4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response

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