ArticleMaterials (Basel, Switzerland)2026
Preparation and Characterization of a Binary Form-Stable Composite Phase-Change Material Based on n-Decanol and n-Octanoic Acid.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Phase-change energy storage materials have the potential to improve the durability of hydraulic concrete; however, phase-change materials suitable for dam engineering within the 0-5 °C phase-transition range remain limited. In this study, a binary phase-change material was prepared by melt blending n-decanol (DA) and n-octanoic acid (CA). Expanded vermiculite (EV), with a layered porous structure, was selected as the form-stabilizing support matrix. A thermally stable DA-CA/EV composite phase-change material was then prepared by melt impregnation and adsorption, and its thermal properties, shape-stabilization performance, and thermal reliability were systematically characterized. The results indicate that the optimal binary composition is 35 wt.% DA and 65 wt.% CA, with a solidification phase-transition temperature of 2.5 °C and a latent heat of 163 kJ/kg. Moreover, the use of 100-mesh EV as the supporting matrix effectively prevents leakage. The optimal thermal conductivity is achieved when approximately 50 wt.% PCM is adsorbed while a high bulk density is maintained. Owing to its favorable thermal performance and structural stability, the prepared PCM shows promise for application in hydraulic concrete.
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