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Synthesis and light management application of thermochromic hydrogel microparticles

A hydrogel and light management technology, applied in optics, shading screens, nonlinear optics, etc., can solve problems such as increased complexity and cost, increased window surface temperature, and suboptimal technology

Pending Publication Date: 2021-08-06
VERSITECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this transmittance modulation process has two inherent limitations: 1) In order to make VO 2 For use as a smart window coating, a transparent heating unit is required and the resulting increase in window surface temperature reduces insulation
In addition, doping and microstructuring significantly increase the complexity and cost of fabrication
Current technology to overcome the aforementioned hurdles in conventional thermochromic windows is still far from optimal

Method used

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  • Synthesis and light management application of thermochromic hydrogel microparticles
  • Synthesis and light management application of thermochromic hydrogel microparticles
  • Synthesis and light management application of thermochromic hydrogel microparticles

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Embodiment Construction

[0034] While the invention has been shown and described in preferred embodiments, the invention can be produced in many different configurations. While preferred embodiments of the present invention are depicted in the drawings and will be described in detail herein, it should be understood that this disclosure is to be considered an example of the principles of the present invention and the relevant functional specifications of its construction and is not intended to limit the invention to Example shown. Those skilled in the art will envision many other possible variations within the scope of the invention.

[0035]It should be noted that in this specification, reference to "one embodiment" or "an embodiment" means that the referenced feature is included in at least one embodiment of the invention. Furthermore, individual references to "one embodiment" in this specification do not necessarily refer to the same embodiment; however, such embodiments are not mutually exclusive,...

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Abstract

Intelligent control of solar transmission through windows promises to reduce energy consumption for thermal comfort in buildings. However, the ability of current smart windows to regulate solar gain based on tunable extinction of phase-change materials is not optimum. A thin-film thermochromic device based on tunable light scattering of hydrogel microparticles of prescribed diameters is reported. In the study, poly (N- isopropylacrylamide)-2-Aminoethylmethacrylate hydrochloride (pNIPAm-AEMA) microparticles are synthesized, with low phase transition temperature of about 32 DEG C. Notably, the average size of pNIPAm-AEMA particles can vary from 1388 nm at 25 DEG C to 546 nm at 35 DEG C, leading to unprecedented infrared transmittance modulation of 75.6%, in agreement with the numerical simulation based on Mie theory. A high luminous transmittance of 87.2% is accomplished. The pNIPAm-AEMA device demonstrates tunable scattering with excellent stability and scalability, which may find application in a broader field of light management beyond energy-saving smart windows.

Description

[0001] related application [0002] This application claims the benefit of provisional application 62 / 756,260, filed November 6, 2018. technical field [0003] The present invention relates generally to the field of thermochromic hydrogel microparticles. More specifically, the present invention relates to the synthesis and light management applications of thermochromic hydrogel microparticles. Background technique [0004] Significant efforts have been made for light management in energy-efficient buildings to reduce energy use in heating, ventilation, and air-conditioning (HVAC) systems, which accounted for 13 percent of total energy consumption in the United States in 2006, and in 2020 ( projected) account for 10% of total energy consumption in the United States. Light management using advanced smart window technology is promising because, theoretically, it can save more than 1.055×10 15 kJ of energy (ie, 1% of total annual energy consumption). Thermochromic and elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01B32B17/10E06B9/24
CPCG02F1/0147E06B9/24B32B17/068C08J3/075C08J2333/10C08J2333/26C08L33/10C08L33/26G02F1/0063G02F1/009
Inventor N·方李新浩刘畅冯宪平
Owner VERSITECH LTD
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