Active-passive dual-control smart window with thermochromic synergistic fluidic glass for building energy efficiency

Lei, Qiuxing; Wang, Lingling; Xie, Huaqing; Yu, Wei

doi:10.1016/j.buildenv.2022.109407

Cited by 33 publications

(13 citation statements)

References 34 publications

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“…As the main bridge for heat exchange between the inside and outside of a building, windows account for the largest share of energy exchange in the building structure. Smart windows are highly expected to reduce energy consumption via delicately designed thermal conductivity as well as passive cooling properties. , Thermo- and hygrochromic hydrogel smart windows can be activated by changes in surrounding environmental conditions. Electrochromic hydrogel smart windows can be actively controlled by manually applying voltage; however, they require additional energy input and complex device assembly.…”

Section: Energy-efficient and Smart Applicationsmentioning

confidence: 99%

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Shang,

Zhang,

Zhang

et al. 2024

ACS Energy Lett.

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Radiative cooling cools by radiating heat toward outer space. Evaporative cooling cools by dispatching the latent heat of water via evaporation. These two types of cooling operate without additional pollutant generation. Hydrogel is the one substance that can combine the above two cooling strategies and thus holds high promise to facilitate the construction of a carbon neutral society. This review article first documents the basic principles related to passive cooling, evaporative cooling, heat transfer, and light modulation. Then, the general considerations for hydrogel-based cooling materials are summarized. Third, stimuli-responsive hydrogel-based cooling systems are systematically discussed from aspects of operation mechanisms as well as material selections. Lastly, typical applications of hydrogel-based radiative and/or evaporative cooling materials in buildings, electronic devices, and wearable devices are discussed. Challenges for further development of the hydrogel-based cooling materials are discussed as ending remarks.

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Section: Energy-efficient and Smart Applicationsmentioning

confidence: 99%

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Shang,

Zhang,

Zhang

et al. 2024

ACS Energy Lett.

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“…The PNIPAm-AEMA hydrogel used copolymer hydrogel particles with a specified diameter to predict the effective scattering in the broad solar spectrum, which extended the light repulsion to the infrared region effectively to achieve both ultrahigh Δ T sol (81.3%) and T lum (87.2%). The tunable scattering behavior of hydrogel particles can improve the properties of energy-saving smart windows and be widely used in light modulators, displays, and invisibility cloaking. , Lei et al embed the PNIPAm microgel into highly transparent polyacrylamide (PAM) matrix, which showed an ultrahigh luminous transmittance of 90.6% and solar energy modulation of 65.5%. Further, by introducing solar absorbing nanoparticles (graphene or Cs x WO 3 ), they developed a novel active-passive dual-control (APDC) smart window.…”

Section: Hydrogelmentioning

confidence: 99%

“…The tunable scattering behavior of hydrogel particles can improve the properties of energy-saving smart windows and be widely used in light modulators, displays, and invisibility cloaking. 250,251 Lei et al 252 embed the PNIPAm microgel into highly transparent polyacrylamide (PAM) matrix, which showed an ultrahigh luminous transmittance of 90.6% and solar energy modulation of 65.5%. Further, by introducing solar absorbing nanoparticles (graphene or Cs x WO 3 ), they developed a novel active-passive dual-control (APDC) smart window.…”

Section: Poly(n-isopropylacrylmide) (Pnipam)mentioning

confidence: 99%

Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives

Zhang

Zhou

et al. 2023

Chem. Rev.

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Thermochromic energy efficient windows represent an important protocol technology for advanced architectural windows with energy-saving capabilities through the intelligent regulation of indoor solar irradiation and the modulation of window optical properties in response to real-time temperature stimuli. In this review, recent progress in some promising thermochromic systems is summarized from the aspects of structures, the micro-/mesoscale regulation of thermochromic properties, and integration with other emerging energy techniques. Furthermore, the challenges and opportunities in thermochromic energy-efficient windows are outlined to promote future scientific investigations and practical applications in building energy conservation.

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“…Alginate/Poloxamer 407 Dental caries treatment [192] Alginate/sodium hyaluronate/ methylcellulose composite Arthritis treatment [193] Alginate/PNIPAAm Recovery of Li from seawater [187] Alginate/PNIPAAm/ε-polylysine Recovery of uranium from seawater [188] Alginate/gelatin/ZnO Scaffold for cartilage tissue regeneration [194] Chitosan Injectable, controllable degradation, and drug delivery [195] Chitosan/alginate Injectable hydrogels for ocular disease treatments [196] Hyaluronic acid/dextran PNIPAAm, PEG, PLGA Chitosan/PNIPAAm Delivery of therapeutic proteins for cardiac protection against myocardial infarction [197] Methylcellulose Oral dosage drug [198,199] Prevention of post-operatory adhesion Hydroxypropyl cellulose/ Konjac glucomannan biomass Super hygroscopic collector of water from atmospheric moisture [200] Methacrylate gelatin Adhesion, wound repair [201] Gelatin/silk Nerve guidance conducts for nerve regeneration [202] Cellulose/Pluronic F127 Injectable drug delivery [203] PNIPAAm Solar water evaporation [164] PNIPAAm-poly(acrylic acid) (PAA) copolymers Smart window for building energy efficiency [204,205] Artificial breathing actuator PEG-PCL copolymers Injectable gel to deliver therapeutic proteins for ocular diseases [68,206] Drug delivery, graft Poly(3-hydroxybutyrate) (PHB) Tissue engineering [207] Hydrogel-Ag NPs Antibacterial hydrogel for wound healing [115,208,209] Antibacterial coating…”

Section: Hydrogel Nature Main Properties And/or Applications Referencesmentioning

confidence: 99%

Recent Advances in Poly(N‐isopropylacrylamide) Hydrogels and Derivatives as Promising Materials for Biomedical and Engineering Emerging Applications

et al. 2023

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Temperature‐sensitive (thermosensitive) hydrogels, which are part of the family of stimulus‐sensitive hydrogels, consist of water‐filled polymer networks that display a temperature‐dependent degree of swelling. Thermosensitive hydrogels, which can undergo phase transition or swell/de‐swell as temperature changes, have great potential in various technological and biomedical purposes for a number of reasons: their temperature response is reversible, hydrogels are stable and easy to prepare, they can be biocompatible and also be suitably combined with other organic and inorganic materials, resulting in new materials with outstanding properties. Among thermosensitive hydrogels poly(N‐isopropylacrylamide) (PNIPAAm) is the most extensively studied because it brings together the best properties of these materials. Consequently, in the past few years, a wide number of applications and new chemical processes to prepare PNIPAAm and their derivatives are being proposed. The objective of this review is to summarize the fundamentals of thermosensitive hydrogels and recent advances in preparation and both technological and biomedical applications of thermosensitive hydrogel, with a special focus on PNIPAAm and their derivatives. Special attention has been given to the discussion of challenges and future research perspectives based on new horizons not yet considered.

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Active-passive dual-control smart window with thermochromic synergistic fluidic glass for building energy efficiency

Cited by 33 publications

References 34 publications

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives

Recent Advances in Poly(N‐isopropylacrylamide) Hydrogels and Derivatives as Promising Materials for Biomedical and Engineering Emerging Applications

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