Catalyst-free, reprocessable, intrinsic photothermal phase change materials networks based on conjugated oxime structure

Robust, Versatile Access to Quasi-Monodispersed Phase Change Sub-Microcapsules via Ab Initio Emulsion Polymerization

“…PCMs are usually divided into inorganic PCMs and organic PCMs according to their chemical compositions. For inorganic PCMs, the intrinsic shortcomings such as high phase change temperature, usually higher than 100 °C, corrosion, and undercooling seriously limit their application at low temperature such as smart buildings and cloths, while they have the advantages of high latent heat and high thermal conductivity. − In contrast, organic PCMs such as paraffin, fatty alcohols/acids, and their derivatives have the advantages of non-corrosiveness, low undercooling, low price, and a tunable phase change temperature range from 10 to 100 °C . However, there are some difficulties in the practical application of organic PCMs, such as low thermal conductivity and the leakage from the solid–liquid phase change.…”

Engineering Polymeric Phase-Change Sub-Microcapsules with a High Encapsulation Fraction by Facile, Versatile Suspension Polymerization

“…With the depletion of nonrenewable energy, improving the efficiency of energy and increasing the utilization of sustainable energy have become the trend of future development. − In a wide variety of energy conversions, there is always a portion of heat that is lost in the conversion process. − A large amount of heat is inevitably lost in daily production and life, and about 90% of the global energy budget involves heat conversion. Besides, solar energy is also a sustainable source of thermal energy. ,, Storing thermal energy is a way of storing energy for efficient use of waste heat and solar heat. − Phase-change materials (PCMs) are used to release/absorb thermal energy by melting/crystallizing in a narrow temperature range, which is called latent heat. − PCMs have become one of the most promising methods of storing thermal energy because of their large energy storage density and thermostatic energy storage. , They have great potential applications in smart textiles, smart buildings, batteries, etc. − …”

“…Besides, solar energy is also a sustainable source of thermal energy. 2,8,9 Storing thermal energy is a way of storing energy for efficient use of waste heat and solar heat. 10−12 Phasechange materials (PCMs) are used to release/absorb thermal energy by melting/crystallizing in a narrow temperature range, which is called latent heat.…”

“…23,26,27 Solid−solid polymeric PCMs avoid the leakage of phase-change components by restricting the molecular chain movement ability by covalent bonding, which leads to a decrease in the latent heat efficiency (η) and latent heat density (ΔH). 2,8 By encapsulating the phase-change core (PCC) in the shell material, microencapsulated PCMs or phase-change microcapsules can effectively improve the thermal conduction coefficient, specific surface area, and η of PCMs, and these advantages endow them with great application prospects in smart furniture, smart fibers, and solar energy storage and utilization. 31,32 Phase-change microcapsules often consist of PCCs and shell materials.…”

“…Compared with traditional inorganic PCMs, organic solid–liquid PCMs have the advantages of a narrow phase-change temperature ( T pc ) interval, low subcooling, large energy storage density, and chemical stability, which have attracted much attention. , However, organic solid–liquid PCMs still have problems, such as easy leakage, limiting their potential applications. , In order to resolve the problem of leakage during the phase change, the following PCMs have been developed, such as form-stable PCMs, , solid–solid polymeric PCMs, ,, and microencapsulated PCMs. − Mixing the solid–liquid phase-change components with the polymeric supporting materials via noncovalent interactions can contribute to the formation of form-stable PCMs with an encapsulation fraction lower than 80%. ,, Solid–solid polymeric PCMs avoid the leakage of phase-change components by restricting the molecular chain movement ability by covalent bonding, which leads to a decrease in the latent heat efficiency (η) and latent heat density (Δ H ). , By encapsulating the phase-change core (PCC) in the shell material, microencapsulated PCMs or phase-change microcapsules can effectively improve the thermal conduction coefficient, specific surface area, and η of PCMs, and these advantages endow them with great application prospects in smart furniture, smart fibers, and solar energy storage and utilization. , …”