Synthesis and properties of multifunctional microencapsulated phase change material for intelligent textiles
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Synthesis and properties of multifunctional microencapsulated phase change material for intelligent textiles Jun Li1, Xiaoyun Zhu2, Huichang Wang2, Pengcheng Lin2, Lisi Jia2, Longjian Li1, and Ying Chen2,* 1 2
School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Received: 29 July 2020
ABSTRACT
Accepted: 24 September 2020
Microencapsulated phase change materials (MEPCMs) have been widely used in many fields as thermal energy storage materials. This study reported a novel MEPCM with the functions of thermal energy storage, photothermal conversion, ultraviolet (UV) shielding, and superhydrophobicity, which was particularly suitable for intelligent textiles. The microcapsules based on an n-eicosane core and a CuO-doped polyurea shell with hierarchical structure were fabricated through a one-step interfacial polymerization. The morphology of the capsules and the hierarchical shell structure were identified through scanning and transmission electron microscopy. Thermal analysis indicated that the microcapsules had a high latent heat of 162.3 J/g and demonstrated a high thermal reliability. These microcapsules achieved a good photothermal conversion capability and can reduce UV radiation by approximately 30%. The water contact angle of the MEPCM was over 148° and showed a good superhydrophobic property. Cotton fabric coated with the prepared MEPCM was investigated. Results showed that it achieved a high phase change enthalpy of 36.8 J/g, an effective thermoregulation capability, and a large contact angle of 141.6°.
Published online: 6 October 2020
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Catalin Croitoru.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05399-4
2177
J Mater Sci (2021) 56:2176–2191
GRAPHIC ABSTRACT
Introduction Phase change materials (PCMs) can store or release a large amount of latent heat through physical phase transition with a minimal change in temperature in the range of phase transition temperature [1, 2]. However, PCMs have some drawbacks when they are used in practical applications. PCMs need to undertake repetitive solid–liquid phase change transitions when storing and releasing latent heat, causing them to easily leak. The use of bulk PCMs leads to low thermal conduction and slow thermal response to ambient temperature [3–5]. A new microencapsulation technology of PCMs into a polymer or inorganic shells was proposed to overcome these disadvantages. The prepared MEPCMs can make the form of PCMs stable and can increase their specific surface area to enhance the heat transfer [6–8]. MEPCMs have been widely used in thermal energy storage systems (TES) [9–11], thermal management systems (TMSs) [12, 13], and intelligent textile [14–18]. Microencapsulation methods can be categorized into two groups [6]: physic
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