Summary of the technology
Phase change materials are a class of materials that buffer thermal energy by undergoing a phase transition between a liquid and solid (and vice versa). The inventors here disclose a new implementation to obtain organic microcapsules with an inorganic shell
Keywords: phase change materials, energy storage, building, smart materials, smart buildings, coatings
Project ID : 9-2018-4572
Description of the technology
Cleantech, Environment, Chemistry and Materials
Green, energy storage, advanced materials,phase change materials, energy storage, building, smart materials, smart buildings, coatings
Technology Readiness Level
4- Technology validated in lab
Phase change materials (PCMs) are a class of materials that buffer thermal energy by undergoing a phase transition between a liquid and solid (and vice versa) to modulate external temperature variations. PCMs typically have an organic core with a transition temperature designed to match the set point of the desired system which above this point absorbs latent heat and below releases it. PCM materials already are available in products offered by the building and energy industry. In buildings, PCMs are added to paints and general coatings to moderate temperature fluctuations as well as to reduce energy demand by buffering the heat transfer of standard building materials.
We propose an effective, simple and core-agnostic technique to obtain hermetically closed thin shells surrounding the organic core. In such a scenario, the outer shell does not melt at the respective operating temperatures and therefore prevents coalescence of microcapsules or leakage of the active PCM. Preliminary data also has indicated improvement across a range of physical parameters.
- A process to coat organic microcapsules in near ambient conditions in an aqueous solution
- Stable coating is impervious to organic solvents and microcapsules demonstrate improved thermal conductivity, fire retardation, and compatibility with inorganic matrices
- Allows addition of additives to the core without risk of leakage
- Treatment solution and precursors are competitive
PCMs have found wide use in different industries, where they offer value in heat recovery, energy efficiency, heat storage, transport, and more. PCMs in general are of immense interest now to electrical utilities, particularly those involved in renewables (wind and sun are carbon-free but intermittent energy sources) as a method to store latent heat for prolonged periods of time. This coating technology can bring a strong differentiator with premium performance to a field with very narrow distinction between competing vendors.