Phase-change materials for vaccine cold chain applications

When selecting phase-change materials (PCMs), it is important to understand the interactions of the PCMs with the materials with which they may come into contact. PCMs may change the mechanical properties of the material, and a material may impact the phase-change properties (e.g., melting point or latent heat) of the PCM. In this study, we investigated the impact of PCMs on the mechanical and visible properties of materials commonly used in vaccine cold chain equipment (CCE), including refrigerators, cold boxes, and carriers. The materials tested included polypropylene (PP), polyvinyl chloride (PVC), high-density polyethylene (HDPE), high-impact polystyrene (HIPS), copper, aluminum, mild steel, polyisocyanurate foam, polyurethane foam, enamel appliance paint, and PVC-insulated copper wire. PCMs were classified according to the scheme shown in the figure below. The phase-change materials investigated included water, salt hydrates, paraffins, organic non-paraffins, and a nominal eutectic. Table 1 summarizes

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Added on: 05 April, 2017
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