Development of smart window using an hydroxypropyl cellulose-acrylamide hydrogel and evaluation of weathering resistance and heat shielding effect

2021 ◽  
Vol 232 ◽  
pp. 111348
Author(s):  
Ayano Nakamura ◽  
Ryohei Ogai ◽  
Kenji Murakami
Keyword(s):  
Hydroxypropyl Cellulose ◽  
Shielding Effect ◽  
Smart Window ◽  
Heat Shielding ◽  
Weathering Resistance

Effect of Morphology on Near-Infrared Shielding Properties of Aluminum-Doped ZnO by Solvothermal Synthesis

2020 ◽  
Vol 1007 ◽  
pp. 148-153
Author(s):  
Pimpaka Putthithanas ◽  
Supan Yodyingyong ◽  
Jeerapond Leelawattanachai ◽  
Wannapong Triampo ◽  
Noppakun Sanpo ◽  
...  
Keyword(s):  
Near Infrared ◽  
Low Cost ◽  
Hexagonal Wurtzite Structure ◽  
Infrared Region ◽  
X Ray Diffraction ◽  
Smart Window ◽  
Doped Zno ◽  
Heat Shielding ◽  
Xrd Patterns ◽  
Potential Use

In this work, aluminum-doped ZnO (AZO) is synthesized for heat-shielding applications. A family of ethanolamine (EA: monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine TEA)) is used to control the morphology of aluminum-doped ZnO (AZO) synthesized via a simple solvothermal method at the temperature of 120°C for 6 h. The samples were characterized by field-emission scanning electron microscopy (FE-SEM). The formation of primary ZnO nanoparticles (NPs) showed that TEA yielded highly packed-spherical aggregates not found when DEA and MEA were used. X-ray diffraction (XRD) found that all AZO samples have peaks of the ZnO hexagonal wurtzite structure. XRD patterns of aluminum were found for >10 mol%. UV-Vis-NIR spectrophotometer was used to study the optical property and heat-shielding of the near-infrared region (NIR, the wavelength from 700 - 2500 nm). All AZO NPs of 0, 2, 4, and 10 mol% exhibited strong NIR shielding ability up to 80% insulation. From these results, the AZO NPs have potential use as NIR shielding materials of low-cost and simple processes to be coated on an energy-efficient window as smart window coating in buildings and automotive thus reducing energy consumption, especially in air conditioning usage.

scholarly journals Optimum Heat Shielding Effect of an Engine by using Aluminium, Zirconium Materials

2019 ◽  
Vol 8 (12) ◽  
pp. 1479-1485
Keyword(s):  
Shielding Effect ◽  
Heat Shields ◽  
Optimum Heat ◽  
Heat Shielding

A warmth shield is intended to shield a substance from retaining extreme warmth from an outside source by either dispersing, reflecting or basically engrossing the warmth. Because of the a lot of warmth radiated by inward burning motors, heat shields are utilized on most motors to shield segments and bodywork from warmth. Just as assurance, compelling warmth shields can give a presentation advantage by lessening the under-cap temperatures, accordingly decreasing the admission temperature. Warmth protecting is important to avert motor warmth from harming heat-delicate parts. Most of more established vehicles utilize straightforward steel warmth protecting to diminish warm radiation and convection. Itis currently most regular for present day vehicles are to utilize aluminum warmth protecting which has a lower thickness, can be effectively shaped and does not erode similarly as steel. Higher execution vehicles are starting to utilize fired warmth protecting as this can withstand far higher temperatures just as further decreases in warmth move.

scholarly journals These boots are made for burnin’: Inferring the position of the corpse and the presence of leather footwears during cremation through isotope (δ13C, δ18O) and infrared (FTIR) analyses of experimentally burnt skeletal remains

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0257199
Author(s):  
Kevin Salesse ◽  
Elisavet Stamataki ◽  
Ioannis Kontopoulos ◽  
Georges Verly ◽  
Rica Annaert ◽  
...  
Keyword(s):  
Soft Tissues ◽  
Protective Layer ◽  
Shielding Effect ◽  
Mortuary Practice ◽  
Oxygen Isotope Ratios ◽  
Initial Location ◽  
Heat Shielding ◽  
Favorable Conditions ◽  
Calcined Bone ◽  
Bone Apatite

Cremation is a complex mortuary practice, involving a number of activities of the living towards the dead before, during, and after the destruction of the bodily soft tissues by fire. The limiting information concerning these behavioral patterns obtained from the pyre remains and/or cremation deposits prevents the reconstruction of the handling of the corpse during the burning process. This pioneering study tries to determine the initial positioning of the corpse in the pyre and assess whether the deceased was wearing closed leather shoes during cremation through isotopic (δ13C, δ18O) and infrared (ATR-FTIR) analyses of experimentally burnt pig remains, used as a proxy for humans. The results obtained show that both the position of feet on or within the pyre and the presence of footwears may moderately-to-highly influence the oxygen isotope ratios of bone apatite carbonates and the cyanamide content of calcined bone in certain situations. By forming a protective layer, shoes appear to temporarily delay the burning of the underlying pig tissues and to increase the heat-shielding effect of the soft tissues protecting the bone mineral fraction. In such case, bioapatite bone carbonates exchange oxygen with a relatively more 18O-depleted atmosphere (due to the influence of lignin-derived oxygen rather than cellulose-derived oxygen), resulting in more pronounced decrease in the δ18Ocarb values during burning of the shoed feet vs. unshoed feet. The shift observed here was as high as 2.5‰. A concomitant isotopic effect of the initial location of the feet in the pyres was also observed, resulting in a top-to-bottom decrease difference in the δ18Ocarb values of shoed feet of about 1.4‰ between each deposition level tested. Finally, the presence of cyanamide (CN/P ≥ 0.02) seems to be indicative of closed footwear since the latter creates favorable conditions for its incorporation into bone apatite.

Preparation of VO 2 /Al-O core-shell structure with enhanced weathering resistance for smart window

2017 ◽  
Vol 43 (5) ◽  
pp. 4055-4061 ◽  
Author(s):  
Kun Tong ◽  
Rong Li ◽  
Jingting Zhu ◽  
Heliang Yao ◽  
Huaijuan Zhou ◽  
...  
Keyword(s):  
Shell Structure ◽  
Core Shell ◽  
Smart Window ◽  
Core Shell Structure ◽  
Weathering Resistance

Nanomaterials for infrared shielding smart coatings

2018 ◽  
Vol 11 (05) ◽  
pp. 1830004 ◽  
Author(s):  
Shu Yin ◽  
Anung Riapanitra ◽  
Yusuke Asakura
Keyword(s):  
Thin Films ◽  
Mixed Valence ◽  
Shielding Effect ◽  
Smart Window ◽  
Functional Nanoparticles ◽  
Smart Coatings ◽  
Potential Applications ◽  
Thermochromic Properties ◽  
Saving Effect ◽  
Functional Components

Synthesis and characterization of functional nanoparticles and their applications for smart window are reviewed. Various kinds of nanomaterials and their composites are successfully synthesized by solvothermal process. Thin films on glass substrate can be fabricated by doctor blade method using nanoparticles as starting materials. The mixed valence state tungsten-based homogeneous nanomaterials possess excellent infrared (IR) light shielding properties, implying their potential applications for the heat ray shielding and indoor energy saving effect in summer. On the other hand, VO2 monoclinic-based nanoparticles possess smart and excellent thermochromic properties, show excellent heat ray shielding effect in summer and heating effect of winter indoors. Also, multifunctionality of thin films can be realized by fabricating the composites with various functional components, implying their potential applications for IR shielding, photocatalysis and self-cleaning at the same time. The design of composites and structure of thin films might result in the enhancement or properties of practice applications on window materials.

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