Microencapsulated phase change materials with TiO 2 -doped PMMA shell for thermal energy storage and UV-shielding

Zhao, Jing; Yang, Yanyang; Yu, Li; Zhao, Lang; Wang, Hao; Song, Guolin; Tang, Guoyi

doi:10.1016/j.solmat.2017.04.014

Cited by 96 publications

(37 citation statements)

References 30 publications

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“…One of the most common methods is the incorporation of UV absorbers into the PI matrix. Over the past few decades, the embedding of photoprotective materials, especially inorganic UV absorbers (e.g., TiO 2 , ZnO, CuO, CdS, SiO 2 , CeO 2 , and antimony tin oxide (ATO)), in polymeric matrices has been the focus . The UV‐shielding properties of these inorganic nanoparticles dispersed in polymeric matrices are significantly superior to those of their bulk states.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Novel Fluorinated Copolyimide/Amine‐Functionalized Sepia Eumelanin Nanocomposites with Enhanced Mechanical, Thermal, and UV‐Shielding Properties

Liao

Tian

et al. 2017

Macro Materials & Eng

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Novel fluorinated copolyimide/amine‐modified sepia eumelanin (ASE) nanocomposites are successfully fabricated via covalent bonds. To achieve this, the polyimide (PI) is synthesized by random co‐polycondensation. The effects of ASE on the structure and properties of the PI are investigated. A multilinked network is formed with ASE acting junctions in the nanocomposites. The mechanical properties of the PI are significantly improved by the addition of ASE, and the optimal tensile strength and elongation at break are 79.7 MPa and 85.42%, respectively. UV–vis transmittance, methylene blue (MB) photodegradation, and recyclability measurements confirm that the PI/ASE nanocomposites are transparent to visible light at low ASE loadings and show outstanding UV‐shielding properties and lifetimes under intense UV irradiation owing to the synergistic absorption of UV light by the PI matrix and ASE. Furthermore, the PI/ASE nanocomposites have enhanced thermal properties with initial degradation temperatures above 500 °C. These properties endow the nanocomposites with great potential for UV‐shielding in the conditions with high temperature and intense ultraviolet light.

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Section: Introductionmentioning

confidence: 99%

Preparation of Novel Fluorinated Copolyimide/Amine‐Functionalized Sepia Eumelanin Nanocomposites with Enhanced Mechanical, Thermal, and UV‐Shielding Properties

Liao

Tian

et al. 2017

Macro Materials & Eng

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“…However, when diatomite continued to increase, ruptured microPCMs appeared (Figure 4f). This may suggest that the addition of a moderate amount of diatomite could enhance the mechanical strength of the shell and will hardly deform [31]. Excessive amounts of diatomite led to an agglomeration of particles and had a negative influence on the adsorption of the shell on the surface of the core [32], which was not beneficial to the core coated by the shell.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Performances of Phase Change Microcapsules with a Polymer/Diatomite Hybrid Shell for Thermal Energy Storage

et al. 2018

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The mechanical behavior of phase-change microcapsules (microPCMs) is of vital significance for practical applications in thermal energy storage. Hence, a new type of microPCMs based on an n-octadecane (C18) core and a melamine-urea-formaldehyde (MUF)/diatomite hybrid shell was developed through in situ polymerization. Based on SEM micrographs, most microPCMs exhibited a nearly spherical and smooth microstructure, with broadened particle size distributions. It was confirmed by Fourier transform infrared (FTIR) that successful polymerization of diatomite into the microPCMs occurred, and that additional diatomite had no effect on the core coated by the shell. In addition, the results of the differential scanning calorimeter (DSC) and Atomic Force Microscopy (AFM) demonstrated that the mechanical properties of the microPCMs were remarkably improved by the addition of a moderate amount of diatomite, but that the heat enthalpy and encapsulated efficiency (η) decreased slightly. The incorporation of 2 wt % diatomite resulted in the average Young’s modulus of microPCMs, which was 1.64 times greater than those of microPCMs without diatomite. Furthermore, the melting and crystallization enthalpies and the encapsulated efficiency of the microPCMs were as high as 237.6 J/g, 234.4 J/g and 77.90%, respectively. The microPCMs with a polymer/diatomite hybrid shell may become the potential materials in the application of thermal energy storage.

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“…When the weight ratio of MMA to n-octadecane is 1 : 1, the prepared microcapsules exhibited the highest encapsulation efficiency of 62.55%. Zhao et al successfully prepared bifunctional microcapsules by using n-octadecane as the core and PMMA doped with TiO 2 as the hybrid shell [95]. It was found that increasing TiO 2 could improve the thermal conductivity of microcapsules but led to lower enthalpy and encapsulation efficiency.…”

Section: Organic-inorganic Hybrid Shellsmentioning

confidence: 99%

Phase Change Material (PCM) Microcapsules for Thermal Energy Storage

Peng

Dou

et al. 2020

Advances in Polymer Technology

179

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Phase change materials (PCMs) are gaining increasing attention and becoming popular in the thermal energy storage field. Microcapsules enhance thermal and mechanical performance of PCMs used in thermal energy storage by increasing the heat transfer area and preventing the leakage of melting materials. Nowadays, a large number of studies about PCM microcapsules have been published to elaborate their benefits in energy systems. In this paper, a comprehensive review has been carried out on PCM microcapsules for thermal energy storage. Five aspects have been discussed in this review: classification of PCMs, encapsulation shell materials, microencapsulation techniques, PCM microcapsules’ characterizations, and thermal applications. This review aims to help the researchers from various fields better understand PCM microcapsules and provide critical guidance for utilizing this technology for future thermal energy storage.

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Microencapsulated phase change materials with TiO 2 -doped PMMA shell for thermal energy storage and UV-shielding

Cited by 96 publications

References 30 publications

Preparation of Novel Fluorinated Copolyimide/Amine‐Functionalized Sepia Eumelanin Nanocomposites with Enhanced Mechanical, Thermal, and UV‐Shielding Properties

Preparation of Novel Fluorinated Copolyimide/Amine‐Functionalized Sepia Eumelanin Nanocomposites with Enhanced Mechanical, Thermal, and UV‐Shielding Properties

Synthesis and Performances of Phase Change Microcapsules with a Polymer/Diatomite Hybrid Shell for Thermal Energy Storage

Phase Change Material (PCM) Microcapsules for Thermal Energy Storage

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