Phase (matter)

Composite number

Engineering

Phase change

Metallurgy

Materials science

Differential scanning calorimetry

Power (physics)

Silicon

Chemical engineering

Polymer

Phase-change material

Thermodynamics

Physics

Organic chemistry

Dynamic mechanical analysis

Thermal

Energy storage

Silicone rubber

Composite material

Silicone

Chemistry

Meteorology

Silicone Elastomers

Triethoxysilane

Thermal energy storage

Silicon dioxide

Solar Energy Materials and Solar Cells

A kind of silicone rubber (SR)/paraffin (Pa)@silicon dioxide (SiO2) composite form-stable phase change material (PCM) was developed in this paper. [email protected]2 was obtained by choosing Pa as PCM core microencapsulated in SiO2 shell based on tetraethoxysilane (TEOS) and γ-aminopropyl triethoxysilane (APTES) as precursors, then [email protected]2 microencapsules were embedded in SR matrix to fabricate SR/[email protected]2 composites. The SiO2 shell can provide a barrier for the melted Pa and meanwhile have reinforcing effect on SR as inorganic filler. The in-situ modification of SiO2 shell using APTES owing to the amino groups can not only prevent agglomeration, but also increase interfacial bonding between [email protected]2 with SR. The thermal and mechanical properties of the form-stable PCMs were characterized by differential scanning calorimetry (DSC) and mechanical tests. The results showed that the thermal and mechanical properties of SR/[email protected]2 composites were better than those of SR/Pa and SR/Pa/SiO2. Leakage test was conducted by heating the prepared composites over the melting temperature of Pa. The SR/[email protected]2 composites were found as form-stable PCM with low leakage rate. The phase change latent heat of the SR/[email protected]2 composites was up to 92.39 J g−1 and the composites can be used for thermal energy storage.

Silicone rubber/paraffin@silicon dioxide form-stable phase change materials with thermal energy storage and enhanced mechanical property