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Related Concept Videos

Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Bidirectional optical response hydrogel with adjustable human comfort temperature for smart windows.

Zhenkun Yu1, Yulin Ma1, Linhan Mao1

  • 1Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Provincial Engineering Center of Performance Chemicals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China. chenzhaoxia@hubu.edu.cn.

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This study introduces a new smart window with bidirectional optical responses, offering adjustable transparency for energy saving and privacy. The novel material transitions between transparent and opaque states rapidly, enhancing building energy efficiency.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Sustainable Building Technologies

Background:

  • Current smart windows have limitations in balancing energy saving and privacy due to single-phase thermochromic materials.
  • Existing technologies often lack the adaptability required for optimal indoor comfort and energy management.

Purpose of the Study:

  • To develop a novel bidirectional optically responsive smart window (BSW) with tunable optical properties.
  • To enhance energy conservation and privacy protection in buildings through advanced material design.

Main Methods:

  • Incorporation of sodium dodecyl sulfate (SDS)/potassium tartrate (PTH) micelles into a PNIPAM hydrogel to create a composite.
  • Encapsulation of the composite hydrogel within glass panels to form the smart window.
  • Characterization of the material's upper critical solution temperature (UCST) and lowest critical solution temperature (LCST).

Main Results:

  • The BSW demonstrated remarkable transparency (92.5%) and high visible light transmission (91.31%).
  • Achieved excellent solar modulation capabilities (ΔTsol,UCST = 76.34%, ΔTsol,LCST = 76.75%) with a rapid transparent-opaque transition (<1 °C).
  • Exhibited selective infrared light transmission and bidirectional optical responses for privacy and solar radiation blocking.

Conclusions:

  • The developed smart window offers a promising solution for building energy conservation by dynamically controlling light and heat.
  • The material's unique properties are suitable for applications beyond windows, including anti-counterfeiting, information encryption, and temperature monitoring.