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<p>Organic phase change materials (PCMs) have attracted significant attention for cooling applications in buildings. However, challenges such as compatibility issues and the limited availability of organic PCMs with phase change temperatures suitable for moderate climates (30–40&#xa0;°C) have restricted their widespread adoption. The study aims to develop a Nanoencapsulated Eutectic PCM-based Cement Mortar (N-EPCM) designed for external plastering applications in buildings. Lauric acid (LA) and octadecanol (OD) were used to prepare a binary eutectic PCM (EP), which was subsequently nanoencapsulated using the in situ polymerization technique. The N-EP was incorporated into the cement mortar in varying proportions (5–25% by mass of cement). The results suggest the N-EP exhibited a melting temperature of 36.38&#xa0;°C and a latent heat of 205.6&#xa0;J&#xa0;g<sup>−1</sup>, with good thermal stability and reliability. The optimal mix, N-EPCM 4, achieved a compressive strength of 16.67&#xa0;MPa, exceeding IS 2250: 1981 recommendations. To evaluate thermal performance, two slabs were cast: a reference cement mortar (CM) slab and PCM-plastered slab (N-EPCM 4), tested as per ASTM C1363. The N-EPCM 4 slab exhibited a temperature reduction of 3.4&#xa0;°C and a 62-min delay in peak temperature compared to the CM slab. Overall, the excellent thermal energy storage capability of N-EPCM 4, derived from the eutectic combination of LA and OD, makes it a viable candidate for enhancing energy efficiency and sustainability in buildings under moderate climatic conditions, with improved thermal stability and durability.</p> Graphical abstract <p></p>

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Comprehensive thermal, structural, and heat transfer evaluation of Nanoencapsulated Eutectic PCM-based plaster for sustainable energy-efficient buildings

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • G. Naveen Kumar,
  • Bader Al-Aifan,
  • Merajuddin Khan,
  • N. Aravindan,
  • Vamshi Chaitanya Annimalla,
  • Mohammed Rafi Shaik

摘要

Organic phase change materials (PCMs) have attracted significant attention for cooling applications in buildings. However, challenges such as compatibility issues and the limited availability of organic PCMs with phase change temperatures suitable for moderate climates (30–40 °C) have restricted their widespread adoption. The study aims to develop a Nanoencapsulated Eutectic PCM-based Cement Mortar (N-EPCM) designed for external plastering applications in buildings. Lauric acid (LA) and octadecanol (OD) were used to prepare a binary eutectic PCM (EP), which was subsequently nanoencapsulated using the in situ polymerization technique. The N-EP was incorporated into the cement mortar in varying proportions (5–25% by mass of cement). The results suggest the N-EP exhibited a melting temperature of 36.38 °C and a latent heat of 205.6 J g−1, with good thermal stability and reliability. The optimal mix, N-EPCM 4, achieved a compressive strength of 16.67 MPa, exceeding IS 2250: 1981 recommendations. To evaluate thermal performance, two slabs were cast: a reference cement mortar (CM) slab and PCM-plastered slab (N-EPCM 4), tested as per ASTM C1363. The N-EPCM 4 slab exhibited a temperature reduction of 3.4 °C and a 62-min delay in peak temperature compared to the CM slab. Overall, the excellent thermal energy storage capability of N-EPCM 4, derived from the eutectic combination of LA and OD, makes it a viable candidate for enhancing energy efficiency and sustainability in buildings under moderate climatic conditions, with improved thermal stability and durability.

Graphical abstract