Thermal behavior of composite phase change materials based on polyethylene glycol and expanded vermiculite with modified porous carbon layer

Form-Stable Phase Change Materials with Enhanced Thermal Conductivity Based on Binary Capric-Palmitic Acid and Graphite Carbon In Situ Modified Expanded Perlite

“…With the development of economy and society, the energy crisis problem has become particularly prominent. , At present, it is a global priority to solve the energy crisis by reducing energy consumption and improving energy efficiency. , Building energy consumption accounts for 40% of the global energy consumption and nearly 30% of global greenhouse gas emissions, and nonenergy-saving buildings account for 95% of China’s building. , Therefore, it is urgent to improve the existing wall thermal insulation technologies in the field of energy-saving buildings or to develop new ones. EP is used in the field of energy-saving buildings to prevent heat transfer because of its porosity and low thermal conductivity. , However, because of its pore structure, it absorbs the moisture in air during use, resulting in blisters and cracks, which seriously affect its thermal insulation performance. , Simultaneously, EP, as a building insulation material, has poor ability to cope with seasonal changes, so it cannot meet the energy supply requirements of modern energy-saving buildings in terms of time and space. , …”

“…1,2 At present, it is a global priority to solve the energy crisis by reducing energy consumption and improving energy efficiency. 3,4 Building energy consumption accounts for 40% of the global energy consumption and nearly 30% of global greenhouse gas emissions, and nonenergy-saving buildings account for 95% of China's building. 5,6 Therefore, it is urgent to improve the existing wall thermal insulation technologies in the field of energy-saving buildings or to develop new ones.…”

Form‐stable Na 2 SO 4 ·10H 2 O‐Na 2 HPO 4 ·12H 2 O eutectic/hydrophilic fumed silica composite phase change material with low supercooling and low thermal conductivity for indoor thermal comfort improvement

“…However, the leakage of molten PCMs results in difficulties in storage and sealing, which is the common defect for all solid‐liquid PCMs. To handle this issue, shape‐stable composite PCMs (CPCMs) comprising PCMs and supporting carriers (porous materials) have been developed . Although the PCMs become liquid, the CPCMs still remain solid without leaking, thus favoring the practicability of PCMs .…”

“…To handle this issue, shape-stable composite PCMs (CPCMs) comprising PCMs and supporting carriers (porous materials) have been developed. 31 Although the PCMs become liquid, the CPCMs still remain solid without leaking, thus favoring the practicability of PCMs. 32 In the latest years, embedding PCMs directly into inorganic porous materials as the carriers has motivated extensive interest, because this method enjoys numerous acknowledged superiorities including competitive price, shape stability, excellent mechanical strength, and extremely simple preparation technology.…”

Thermally Conductive and Shape‐Stabilized Polyethylene Glycol/Carbon Foam Phase‐Change Composites for Thermal Energy Storage

“…Phase‐change materials (PCMs) as promising thermal storage materials have been attracting attention owing to their high latent heat, low phase‐change temperature, negligible supercooling and chemical stability . PCMs can be employed in building energy storage systems, waste heat recovery systems, thermo‐regulating fibres, smart textiles and solar thermal energy conversion . Among the various types of PCMs, polyethylene glycol (PEG) as the most promising solid/liquid PCM has been extensively investigated owing to its high phase transition enthalpy, low vapour pressure, good chemical and thermal stability, suitable phase‐change temperature and non‐toxicity .…”