Preparation of acrylic PCM microcapsules with dual responsivity to temperature and magnetic field changes

Lashgari, Somayeh; Mahdavian, Ali Reza; Arabi, Hassan; Ambrogi, Veronica; Marturano, Valentina

doi:10.1016/j.eurpolymj.2018.02.011

Cited by 38 publications

(14 citation statements)

References 31 publications

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“…PCMs are capable of storing and releasing large amounts of energy when undergoes phase change. PCMs/PMMA capsules are developed for various applications in buildings such as thermal protection, cooling, air‐conditioning, concrete, wall/wallboards, and for solar heating systems . Yang et al .…”

Section: Application Of Pmma Capsulesmentioning

confidence: 99%

“…The results showed that the thermal conductivity of the Mag–PCM microcapsules increased linearly with the increase in Fe3O4 nanoparticles content. The introduced dual‐functional PMMA microcapsules have potential applications in microelectronic elements, electronic devices, textile, and even special buildings such as hospitals with anti‐jamming and thermal regulating effectiveness …”

Section: Application Of Pmma Capsulesmentioning

confidence: 99%

“…For PMMA microcapsules loaded PCMs, main mechanism of the function of these capsules is phase transitions of core content without any leakage or release of the melted PCM from capsule. The thermal energy transition (storage or release) occurs when a core material changes from solid to liquid phase or liquid to solid phase …”

Section: Release Mechanisms Of Core From Pmma Microcapsulesmentioning

confidence: 99%

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Material encapsulation in poly(methyl methacrylate) shell: A review

Ahangaran

Navarchian

Picchioni

2019

J of Applied Polymer Sci

104

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Material encapsulation is a relatively new technique for coating a micro/nanosize particle or droplet with polymeric or inorganic shell. Encapsulation technology has many applications in various fields including drug delivery, cosmetic, agriculture, thermal energy storage, textile, and self-healing polymers. Poly(methyl methacrylate) (PMMA) is widely used as shell material in encapsulation due to its high chemical stability, biocompatibility, nontoxicity, and good mechanical properties. The main approach for micro/nanoencapsulation of materials using PMMA as shell comprises emulsion-based techniques such as emulsion polymerization and solvent evaporation from oilin-water emulsion. In the present review, we first focus on the encapsulation techniques of liquid materials with PMMA shell by analyzing the effective processing parameters influencing the preparation of PMMA micro/nanocapsules. We then describe the morphology of PMMA capsules in emulsion systems according to thermodynamic relations. The techniques to investigation of mechanical properties of capsule shell and the release mechanisms of core material from PMMA capsules were also investigated.

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Section: Application Of Pmma Capsulesmentioning

confidence: 99%

Section: Application Of Pmma Capsulesmentioning

confidence: 99%

Section: Release Mechanisms Of Core From Pmma Microcapsulesmentioning

confidence: 99%

See 1 more Smart Citation

Material encapsulation in poly(methyl methacrylate) shell: A review

Ahangaran

Navarchian

Picchioni

2019

J of Applied Polymer Sci

104

View full text Add to dashboard Cite

show abstract

“…As expected, the calculated encapsulation efficiency values increased when the shell/core ratio used in microencapsulation process decreased. Additionally, according to the DSC analysis results, it was concluded that produced microcapsules had extensive potential to be used for developing thermal sensor or thermal energy storage materials …”

Section: Resultsmentioning

confidence: 99%

Preparation of poly(methyl methacrylate‐co‐ethylene glycol dimethacrylate‐co‐glycidyl methacrylate) walled thermochromic microcapsules and their application to cotton fabrics

Tözüm

Alkan

Aksoy

2019

J of Applied Polymer Sci

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This study focused on fabrication of the thermochromic microcapsules and their application to the cotton fabric. In this study, thermochromic systems composed of crystal violet lactone, bisphenol A, and 1‐tetradecanol were prepared and microencapsulated by emulsion polymerization method in poly(methyl methacrylate‐co‐ethylene glycol dimethacrylate‐co‐glycidyl methacrylate) wall. The microcapsules were analyzed by Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, differential scanning calorimetry, and thermogravimetric analysis. Their thermoregulating property was tested by T‐history test. The results revealed that microcapsules with smooth surfaces, core–shell structured, and spherical shape were successfully produced. The latent heat storage capacity of the microcapsules decreased from 202 J g−1 to 167 J g−1 when their shell/core ratio changed from 0.5/1 to 2/1. Microcapsules were adequately had sufficient thermal resistance to the temperatures they will encounter during their application to textile products and their usage. According to the UV–visible spectroscopy analysis and color measurements, the microcapsules exhibited reversible color change from blue to colorless and vice versa. Besides, the microcapsule impregnated fabric was able to absorb latent heat energy of 21.79 J g−1 at around 35 °C and had cooling effect. According to the colorimetric parameters, the fabric was at blue color at room temperature and became colorless when heated to the temperature above the melting point of thermochromic system. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48815.

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“…paraffin) and reported that the addition of this particular type of nanoparticles (particle size in the range of 1-100 nm) [119] is effective in enhancing the heat transfer properties of PCM significantly. Lashgari et al [120] prepared magnetic microcapsules with n-hexadecane/Fe 3 O 4 as the core material and PMMA as the shell material and reported successful production of microcapsules exhibiting novel dual functional features, such as superparamagnetic properties with low remanence and coercivity. Figure 11 shows the basic steps involved in the emulsion polymerisation method.…”

Section: Suspension Polymerisationmentioning

confidence: 99%

Phase change materials for building construction: An overview of nano-/micro-encapsulation

Sivanathan

Dou

Wang

et al. 2020

Nanotechnology Reviews

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Buildings contribute to 40% of total global energy consumption, which is responsible to 38% of greenhouse gas emissions. It is critical to enhance the energy efficiency of buildings to mitigate global warming. In the last decade, advances in thermal energy storage (TES) techniques using phase change material (PCM) have gained much attention among researchers, mainly to reduce energy consumption and to promote the use of renewable energy sources such as solar energy. PCM technology is one of the most promising technologies available for the development of high performance and energy-efficient buildings and, therefore, considered as one of the most effective and on-going fields of research. The main limitation of PCM is its leakage problem which limits its potential use in building construction and other applications such as TES and textiles, which can be overcome by employing nano-/micro-encapsulation technologies. This paper comprehensively overviews the nano-/micro-encapsulation technologies, which are mainly classified into three categories including physical, physiochemical and chemical methods, and the properties of microcapsules prepared. Among all encapsulation technologies available, the chemical method is commonly used since it offers the best technological approach in terms of encapsulation efficiency and better structural integrity of core material. There is a need to develop a method for the synthesis of nano-encapsulated PCMs to achieve enhanced structural stability and better fracture resistance and, thus, longer service life. The accumulated database of properties/performance of PCMs and synthesised nano-/micro-capsules from various techniques presented in the paper should serve as the most useful information for the production of nano-/micro-capsules with desirable characteristics for building construction application and further innovation of PCM technology.

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Preparation of acrylic PCM microcapsules with dual responsivity to temperature and magnetic field changes

Cited by 38 publications

References 31 publications

Material encapsulation in poly(methyl methacrylate) shell: A review

Material encapsulation in poly(methyl methacrylate) shell: A review

Preparation of poly(methyl methacrylate‐co‐ethylene glycol dimethacrylate‐co‐glycidyl methacrylate) walled thermochromic microcapsules and their application to cotton fabrics

Phase change materials for building construction: An overview of nano-/micro-encapsulation

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