Preparation and testing of thermochromic coatings for buildings

Zhang, Yuxuan; Zhai, Xiaoqiang

doi:10.1016/j.solener.2019.09.042

Cited by 42 publications

(15 citation statements)

References 26 publications

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“…Siyah kaplama için setil alkol, mavi kaplama için setil alkol ve 4-hidroksi-N, N-dimetil-tryptamine fazları tespit edilmiştir. (Zhang & Zhai, 2019). Bu çalışmada organik mikrokapsüllenmiş termokromik pigmentlere dayalı akıllı tersinir termokromik kaplamalar sunulmuştur.…”

Section: X-işınları Analiziunclassified

“…Bu nedenle binaların hem soğutma hem de ısıtma yüklerinin azaltılmasına katkıda bulunurlar (Santamouris vd., 2011). Termokromik kaplamalar, binanın ısıtma ve soğutma yükünü azaltmada ve kentsel termal ortamı iyileştirmede büyük uygulama potansiyeline sahiptir (Zhang & Zhai, 2019). Binaların ısıtma ve soğutma yükleri, güneş ışınımının soğurulması ve yansıması ile yakından ilişkilidir.…”

Section: Introductionunclassified

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Termokromik Pigment İçeren Kaplamalarda İşlem Sıcaklık Etkisi

Civan¹,

Kurama²,

Ayas³

2021

Uluslararası Muhendislik Arastirma Ve Gelistirme Dergisi

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Bu çalışmada, kaplama yapmak için ticari olarak temin edilebilen ve 33°C'nin üzerinde yeşilden beyaza, 45°C'nin üzerinde siyahtan beyaza ve 65°C'nin üzerinde maviden beyaza renk değiştiren termokromik pigmentler kullanılmıştır. Farklı sıcaklıklarda ısıl işlem süreci uygulanan kaplamalarda bağlayıcı olarak polivinilpirolidon kullanılmıştır. Hazırlanan kaplamaların renk, faz, mikroyapı analizleri yapılmış, renk değişim sıcaklıkları kızılötesi termometre ve kızılötesi termal kamera ile karakterize edilmiştir. Yapılan çalışmalar sonucunda, günlük hayatta yaşanılan olası sıcaklık değişimlerinin ve risklerin yaşam konforunu değiştirmeden bu yöntem ile tespit edilebileceği ortaya konulmuştur.

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Section: X-işınları Analiziunclassified

Section: Introductionunclassified

Termokromik Pigment İçeren Kaplamalarda İşlem Sıcaklık Etkisi

Civan¹,

Kurama²,

Ayas³

2021

Uluslararası Muhendislik Arastirma Ve Gelistirme Dergisi

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“…The sand colour showed the worst performance in which the maximum difference of indoor temperature for sand/white and sand/yellow colour was 0.9 °C and 0.7 °C, respectively. Thermochromic coatings (TCCs) are an advanced class of coatings that work dynamically to control the thermal load entering buildings [66]. TCCs change their optical properties according to the surface temperature; the colour becomes light at high temperatures, reflecting more sunlight and dark at lower surface temperatures and absorbing heat [67,68].…”

Section: Figure 5 Principle Of Using Light Colour Coatings To Minimis...mentioning

confidence: 99%

A short review on passive strategies applied to minimise the building cooling loads in hot locations

Al-Yasiri

Szabó

2021

Anal. Tech. Szeged.

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Cooling and air-conditioning systems are responsible for the highest energy consumption in buildings located in hot areas. This high share does not only increase the building energy demand cost but also increases the environmental impact, the topmost awareness of the modern era. The development of traditional systems and reliance on renewable technologies have increased drastically in the last century but still lacks economic concerns. Passive cooling strategies have been introduced as a successful option to mitigate the energy demand and improve energy conservation in buildings. This paper shed light on some passive strategies that could be applied to minimise building cooling loads to encourage the movement towards healthier and more energy-efficient buildings. For this purpose, seven popular passive technologies have been discussed shortly: multi-panned windows, shading devices, insulations, green roofing, phase change materials, reflective coatings, and natural ventilation using the windcatcher technique. The analysis of each strategy has shown that the building energy could be improved remarkably. Furthermore, adopting more passive strategies can significantly enhance the building thermal comfort even under severe weather conditions.

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“…Amidst various stimuli-responsive “smart” MOFs, thermochromic MOFs, which change their color under temperature stimuli, have many technological applications in fields such as smart coatings, temperature indication, displays, optical switches, sensing, health monitoring, anti-counterfeiting, information encryption, textile industry, and daily decoration. − To date, there are mainly four types of MOF-based materials having potential for application as thermochromic “smart” materials: (i) luminescent guest@MOF composites; , (ii) lanthanide MOFs; − (iii) copper(I)-iodide-cluster MOFs; − and (iv) transition-metal based MOFs. − Among these materials, transition-metal-based MOFs are considered as good candidates for application as visual thermochromic “smart” materials because of the following: (i) Transition-metal complexes can manifest a wide range of colors, which has long fascinated chemists. The color produced by d–d electron transitions between energy levels of transition-metal ions in a coordination compound falls within the visible spectroscopy region.…”

Section: Introductionmentioning

confidence: 99%

Exploring Reversible Thermochromic Behavior in a Rare Ni(II)-MOF System

Zhang

Yin

et al. 2021

ACS Appl. Mater. Interfaces

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Thermochromic metal–organic frameworks (MOFs) are promising functional materials for a wide range of applications due to their ability to exhibit color variation under external temperature stimuli, yet the development of them with high cyclability and efficient regeneration processes remains challenging. Here, presented is a rare example of an ultrastable Ni(II)-MOF exhibiting an unprecedented reversible four-step color change between two complementary colors in a wide temperature range, which could be repeated for at least 500 cycles without losing crystallinity and thermochromic performance. Notably, the regeneration can be achieved within 1 min by simply letting the crystals cool naturally in the air, facilitated by the unique nature of the channels’ inner surface. The reversible thermochromic behavior is owing to a series of reversible crystal structure changes with temperature, including the stepwise dehydration/rehydration process, and structural changes. This work facilitates the future development of more MOF-based reversible thermochromic materials with excellent performance and improved practical applicability.

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Preparation and testing of thermochromic coatings for buildings

Cited by 42 publications

References 26 publications

Termokromik Pigment İçeren Kaplamalarda İşlem Sıcaklık Etkisi

Termokromik Pigment İçeren Kaplamalarda İşlem Sıcaklık Etkisi

A short review on passive strategies applied to minimise the building cooling loads in hot locations

Exploring Reversible Thermochromic Behavior in a Rare Ni(II)-MOF System

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