Bidirectional optical response hydrogel with adjustable human comfort temperature for smart windows

Yu, Zhenkun; Ma, Yulin; Mao, Linhan; Lian, Yue; Xiao, Yanwen; Chen, Zhaoxia; Zhang, Yuhong

doi:10.1039/d3mh01376f

Cited by 13 publications

(1 citation statement)

References 38 publications

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“…44–46 These responsive gels have become ideal candidates for generating multifunctional information handling models and have been widely used in anti-counterfeiting technology, information encryption and smart windows. 47–51 Interestingly, the prepared PEA-AA-MAm/IL gel demonstrated an obvious transparency-shifting behavior under the stimulation of different polar solvents. As displayed in Fig.…”

Section: Resultsmentioning

confidence: 96%

Self-adaptive high-temperature gels with long-lasting underwater stability for environmentally tolerant flexible sensors and water-writing papers

Feng,

Li,

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 96%

Self-adaptive high-temperature gels with long-lasting underwater stability for environmentally tolerant flexible sensors and water-writing papers

Feng,

Li,

et al. 2024

J. Mater. Chem. C

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Bidirectional Temperature‐Responsive Thermochromic Hydrogels With Adjustable Light Transmission Interval for Smart Windows

Wang,

Cheng

et al. 2024

Adv Funct Materials

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Thermochromic smart windows have been widely developed for solar regulation to save building energy. However, most current smart windows still exhibit a single responsiveness to a specific temperature, which is not conducive to daytime energy saving or nighttime privacy protection. Herein, a low‐temperature response is achieved by pre‐initiation of the monomer acrylamide (AAm) and acrylic acid (AA) in the synthesis of P(AAm‐co‐AA). Then, N‐isopropyl acrylamide and AAm are introduced into P(AAm‐co‐AA) to form a pre‐polymerized precursor solution. The liquid precursor solution can be encapsulated within two quartz glasses and synthesized in situ to prepare smart windows, which exhibit a high visible light transmittance of 84.4%, excellent solar modulation of 69.5%, and bidirectional temperature responsiveness (cold and hot). In addition, the upper critical solution temperature and the lower critical solution temperature of the hydrogel and the light transmission interval between the two temperatures can be flexibly adjusted to adapt to different climates and individual user needs. The designed smart window maintains a high light transmission within the human body's comfort temperature range. The bidirectional temperature response window achieves the dual functions of energy saving and privacy protection, making it an ideal smart window candidate with good prospects for practical applications.

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Molecular Confinement Engineering Induced Super Thermostable and RT‐Adjustable Gel for Tri‐Heat‐Channeled Smart Window

Guo,

Xiong,

Nan

et al. 2024

Adv Funct Materials

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Thermochromic hydrogel‐based smart windows hold great potential for building energy‐saving. However, most of thermochromic hydrogels possess high response temperatures (RT) and poor size stability under heat, resulting in limited energy‐saving performance for smart windows. Here, a printable thermochromic gel (PNC) is reported with low thermal shrinkage and tunable RT for smart windows applications via molecular confinement engineering. The RT of PNC gel is well within the comfort temperature zone of the human body and can be modulated (26.5–31.5 °C) by the introduced support networks. Importantly, the resultant gel exhibits a super transmittance (95%) in visible light and an outstanding modulation (87%) for sunlight. Based on PNC gel, a tri‐heat‐channeled smart window is fabricated using a multilevel thermal regulation strategy that couples conduction, radiation, and evaporative cooling. The tri‐heat‐channeled smart window demonstrates outstanding daytime cooling (10 °C lower than conventional windows) and can cut off 30% of annual heating, ventilation, and air‐conditioning (HAVC) energy consumption. Furthermore, a novel smart window is designed with invisible shutters that appear only when needed. This work offers novel clues for constructing versatile gels and innovative smart windows for building energy‐saving.

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Bidirectional optical response hydrogel with adjustable human comfort temperature for smart windows

Abstract: A unique bidirectional optical response hydrogel with adjustable temperature for human comfort, remarkable transparency, and solar modulation is developed to contribute to the fields of anti-counterfeiting, information encryption, and smart windows.

Cited by 13 publications

References 38 publications

Self-adaptive high-temperature gels with long-lasting underwater stability for environmentally tolerant flexible sensors and water-writing papers

Self-adaptive high-temperature gels with long-lasting underwater stability for environmentally tolerant flexible sensors and water-writing papers

Bidirectional Temperature‐Responsive Thermochromic Hydrogels With Adjustable Light Transmission Interval for Smart Windows

Molecular Confinement Engineering Induced Super Thermostable and RT‐Adjustable Gel for Tri‐Heat‐Channeled Smart Window

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