Encapsulating an organic phase change material within emulsion-templated poly(urethane urea)s

Abstract

Interfacial step growth polymerization within oil-in-water high internal phase emulsions was used to synthesize poly(urethane urea) monoliths, consisting of 90% organic phase change material encapsulated within micrometer-scale capsules, for thermal energy storage and release applications.

Recent Advances in Design and Preparation of Polymer-Based Thermal Management Material

“…Polymer has been widely used in functional coating material because of its advantages of good chemical stability, excellent processability, good mechanical properties, satisfactory compatibility with organic solid–liquid PCM. The polymer was coated on the PCM cores using emulsion polymerization [ 122 ], interfacial polymerization [ 123 ] and in situ polymerization [ 124 ]. As shown in Figure 8 a, Wang et al [ 125 ] used Pickering emulsion-templating assisted solvent evaporation approach to prepare microencapsulated PCM with n-eicosane as the core and PMMA as the shell.…”

Micro- and nano-encapsulated metal and alloy-based phase-change materials for thermal energy storage

“…The encapsulating shell is then grown on the surface of the PCM core. 63,64 The emulsion droplet size is in the range of 1-10 mm and can be further decreased to 20-200 nm by providing higher external energy. Stable isotropic liquids with two or more separated phases in equilibrium are also called microemulsions.…”

The Chemistry of Porous Polymers: The Holey Grail

“…Polymerization chemistries are being developed to take advantage of monomers from renewable resources and macromolecular structural chemistries are being developed to enhance degradability. PHs that were based on renewable resource monomers such as polyphenols (e. g., tannin, tannic acid, lignin), plant oils (e. g., soybean, castor), polysaccharides (e. g., alginate, chitosan, dextrin, pectin), and lactide have recently been developed, [62,[115][116][117][118][119][120] as were PHs that were based on polymers containing degradable groups (e. g., esters). [57][58][59][60]62,[121][122][123][124][125][126][127][128][129] In addition, the recent advent of reactive surfactants and/or reactive nanoparticles for HIPE stabilization has produced a significant reduction in the amounts of leachable components.…”