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Thermal energy storage foam concrete incorporating n-Octadecane/CuO microcapsules synthesised via Pickering emulsion strategy.

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Title: Thermal energy storage foam concrete incorporating n-Octadecane/CuO microcapsules synthesised via Pickering emulsion strategy.
Authors: Liu, Jingbo1 (AUTHOR), Liu, Yue1 (AUTHOR) yue.liu@unisa.edu.au, Ma, Xing1 (AUTHOR), Xu, Haolan2 (AUTHOR), Wu, Xuan2 (AUTHOR), Liu, Ming2 (AUTHOR), Liu, Jiarui2 (AUTHOR), Zhuge, Yan1 (AUTHOR) yan.zhuge@unisa.edu.au
Source: Cement & Concrete Composites. May2026, Vol. 169, pN.PAG-N.PAG. 1p.
Subjects: Octadecane, Pickering emulsions, Heat storage, Microencapsulation, Latent heat, Thermal conductivity, Phase change materials, Lightweight concrete
Abstract: This study developed a novel encapsulation methodology for the synthesis of phase change material microcapsules based on the Pickering emulsion strategy. Cu 2 O nanoparticles were selected as emulsifier in this study, effectively stabilised n -Octadecane (C 18) Pickering emulsions and acted as precursors for shell formation, leading to the successful formation of C 18 /Cu 2 O colloidosomes. Upon self-oxidation, Cu 2 O transformed to CuO, enabling crosslinking between neighbouring particles on the emulsion and forming robust microcapsule CuO shells. The resulting C 18 /CuO microcapsules retained a high latent heat capacity after encapsulation, indicating effective thermal storage performance and high encapsulation efficiency. The C 18 /CuO also demonstrated thermal reliability after repeated thermal cycling and improved charging/discharging rate as compared to pure C 18 , making it highly suitable for improving thermal performance in energy-efficient construction materials. Thermal energy storage foam concrete containing 20–50 % C 18 /CuO microcapsules was prepared. Infrared thermal imaging indicated that the C 18 /CuO-derived composites exhibited slower temperature rise and faster cooling response. A thermal conductivity of 0.6112 W/m K was achieved at 50 % C 18 /CuO inclusion, demonstrating the potential of the C 18 /CuO-modified foam concrete for energy efficiency applications. • A novel Pickering emulsion-based encapsulation for n-Octadecane/CuO synthesis. • Cu 2 O nanoparticles stabilised Pickering emulsion forming core-shell colloidosomes. • Cross-link CuO subunits formed robust shell walls. • High latent heat capacity and thermal cycling reliability of the microcapsules. • n-Octadecane/CuO modified foam concrete showed enhanced thermal performance. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This study developed a novel encapsulation methodology for the synthesis of phase change material microcapsules based on the Pickering emulsion strategy. Cu 2 O nanoparticles were selected as emulsifier in this study, effectively stabilised n -Octadecane (C 18) Pickering emulsions and acted as precursors for shell formation, leading to the successful formation of C 18 /Cu 2 O colloidosomes. Upon self-oxidation, Cu 2 O transformed to CuO, enabling crosslinking between neighbouring particles on the emulsion and forming robust microcapsule CuO shells. The resulting C 18 /CuO microcapsules retained a high latent heat capacity after encapsulation, indicating effective thermal storage performance and high encapsulation efficiency. The C 18 /CuO also demonstrated thermal reliability after repeated thermal cycling and improved charging/discharging rate as compared to pure C 18 , making it highly suitable for improving thermal performance in energy-efficient construction materials. Thermal energy storage foam concrete containing 20–50 % C 18 /CuO microcapsules was prepared. Infrared thermal imaging indicated that the C 18 /CuO-derived composites exhibited slower temperature rise and faster cooling response. A thermal conductivity of 0.6112 W/m K was achieved at 50 % C 18 /CuO inclusion, demonstrating the potential of the C 18 /CuO-modified foam concrete for energy efficiency applications. • A novel Pickering emulsion-based encapsulation for n-Octadecane/CuO synthesis. • Cu 2 O nanoparticles stabilised Pickering emulsion forming core-shell colloidosomes. • Cross-link CuO subunits formed robust shell walls. • High latent heat capacity and thermal cycling reliability of the microcapsules. • n-Octadecane/CuO modified foam concrete showed enhanced thermal performance. [ABSTRACT FROM AUTHOR]
ISSN:09589465
DOI:10.1016/j.cemconcomp.2026.106545