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Innovative Radiative Cooling Paint by JNCASR Researchers


Researchers at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) in Bengaluru, an autonomous institute under the Department of Science and Technology, have developed a pioneering paint leveraging radiative cooling technology. In response to rising global temperatures and the demand for sustainable cooling solutions, this cost-effective and eco-friendly paint offers a promising and effective cooling solution.


GS III: Science and Technology

Dimensions of the Article:

  1. Radiative Cooling Technology: A Cooling Innovation
  2. Radiative Cooling Paint: Advancing Cooling Technology

Radiative Cooling Technology: A Cooling Innovation

  • Radiative cooling technology aims to dissipate heat from an object by releasing thermal radiation into the atmosphere, resulting in a cooler object.
  • This process achieves cool surfaces by emitting thermal radiation directly into the extremely cold universe (around 3 Kelvin) through the atmospheric transmission window (8 – 13 µm), operating without electricity.
  • In response to escalating global warming and the urban heat island effect, there is a growing demand for efficient cooling solutions.
  • Traditional active cooling devices such as air-conditioners and refrigerators consume significant electrical energy, contributing to greenhouse gas emissions and heightened surface temperatures.
  • Radiative cooling technology offers a sustainable alternative by emitting thermal radiation without electricity usage, utilizing the atmospheric transmission window.

Radiative Cooling Paint: Advancing Cooling Technology

  • Formulated from a groundbreaking magnesium oxide (MgO)-polyvinylidene fluoride (PVDF) polymer nanocomposite.
  • Utilizes materials that are abundantly available, cost-effective, and environmentally friendly, ensuring non-toxicity.
  • Exhibits exceptional cooling capabilities, featuring high solar reflectivity and infrared thermal emissivity.
  • Integration of dielectric nanoparticles in MgO-PVDF results in remarkable solar reflectance (96.3%) and outstanding thermal emission (98.5%).
  • Specifically designed to combat rising heat impact on buildings, providing efficient cooling and reducing reliance on electricity during hot summer days.
  • Demonstrates superior optical characteristics, reducing surface temperatures by approximately 10°C under intense sunlight, surpassing the effectiveness of standard white paints.
  • Boasts a water-resistant and hydrophobic nature, facilitating easy application on diverse surfaces.
  • Ensures consistent coverage and robust adhesion, enhancing its versatility for various applications.

December 2023