Influence of process parameters on microcapsule formation from chitosan—Type B gelatin complex coacervates

Roy, Jagadish Chandra; Giraud, Stéphane; Ferri, Ada; Mossotti, Raffaella; Guan, Jingpin; Salaün, Fabien

doi:10.1016/j.carbpol.2018.06.087

Cited by 38 publications

(30 citation statements)

References 50 publications

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“…When the concentration of paraffin was less than 70%, the productive ratio of microcapsules was higher than 95%. Roy et al found that the productive ratio was irrelevant to the content of the crosslink agent glutaraldehyde (GTA) [120]. However, increasing the biopolymer ratio of chitosan (CH) to type-B gelatin (GB) from 1.3 to 1.5 or lowering the core/shell ratio from 3.75 to 2.50 could lead to a higher productive ratio.…”

Section: Physical Characterizationmentioning

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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Section: Physical Characterizationmentioning

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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“…Values were taken on every second cycle. On the base of phase transitions enthalpies, the loading content (LC) as well as the encapsulation efficiency (EE) were calculated from the Equations (1) and (2) [43],…”

Section: Thermal Analyses Of the Samplesmentioning

confidence: 99%

Preparation of n-Alkane/Polycaprolactone Phase-Change Microcapsules via Single Nozzle Electro-Spraying: Characterization on Their Formation, Structures and Properties

2020

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The phase change microcapsule (mPCM) is one of the primary candidates in the fields of energy storage and thermal regulation. In this study, electro-spraying, as a green, high-efficiency electrohydrodynamic atomization technology, is applied to the microencapsulation of two phase change materials (PCM) (n-hexadecane and n-eicosane) with three loading contents (30%, 50%, and 70% by weight) in a polycaprolactone matrix. Ethyl acetate (EA) and chloroform (Chl) were chosen as solvents to prepare the working solutions. The objective of this study is to clarify the microencapsulation process during electro-spraying and to optimize the structure and properties of the electro-sprayed mPCM. The structures, morphologies, and thermal properties of the mPCM were characterized by optical microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), and fourier transform infrared spectroscopy (FT-IR). Electro-sprayed spherical and non-porous mPCM have been successfully prepared. The mean diameter and the particle size distribution depend mainly on the choice of the n-alkane, as well as the solvent used to prepare the working solutions. Meanwhile, the structure formation of electro-sprayed mPCM and the loading content of PCM were mainly influenced by the evaporation of the solvent and the phase separation between PCM and poly(caprolactone) (PCL) matrix. During the shell formation or PCL solidification, the control of the PCM leaching out of the matrix allows improving the loading content. Finally, based on a high latent heat and simple formation process, the electro-spraying route of PCM is a green, non-toxic, and high-efficiency direction for energy storage and heat regulation.

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“…The phase‐change microcapsules [1–7] (MPCMs) were reported to have a tiny core‐shell structure formed by a film‐forming material wrapping a phase change material. The most commonly used methods for preparing phase‐change microcapsules include interfacial polymerization, [8–10] in situ polymerization, [11–12] and coacervation [13–15] . Currently, in‐situ polymerization has been widely employed to prepare phase‐change microcapsules.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Dual‐functional Magnetic Phase‐change Microcapsules

Sun

Jiao

et al. 2020

Chemistry An Asian Journal

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The fabrication of desired anti‐magnetic materials for irradiation shielding remains a challenge to date. In this work, a new type of dual‐functional magnetic shielding phase change microcapsules with paraffin as the core, melamine‐formaldehyde (MF) resin as the shell and doped with magnetic particles in the shell were successfully prepared by in situ polymerization. The magnetic particles were dispersed in the shell layer by coating a hydrophilic emulsifier on the surface. These microcapsules were specifically applied to the field of magnetic shielding by the screen printing method. The effect of magnetic particles on the performance of phase‐change microcapsules was examined by differential scanning calorimetry and thermogravimetric analyses. The magnetic type and magnetic strength of the microcapsules were studied by the vibrating sample magnetometer. Moreover, the effects of different magnetic particles (Fe3O4, CrO2) on the performance of phase change microcapsules and the magnetic strength of microcapsules were compared. The results showed that these two kinds of magnetic particles can greatly improve the phase change latent heat, thermal stability, and thermal conductivity of the microcapsules. Finally, the great magnetic shielding role of these microcapsules was demonstrated in both static and pulsed magnetic fields through the screen printing of magnetic shielding ink on wallpaper. Incorporating 0.5 g Fe3O4 inside of microcapsules, specifically, the magnetic intensity was effectively reduced by ∼250 Oe within a short distance in the static field. We expect that these magnetic microcapsules hold great potential for the shielding of irradiations via the screen printing on various substrates.

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Influence of process parameters on microcapsule formation from chitosan—Type B gelatin complex coacervates

Cited by 38 publications

References 50 publications

Phase Change Material (PCM) Microcapsules for Thermal Energy Storage

Phase Change Material (PCM) Microcapsules for Thermal Energy Storage

Preparation of n-Alkane/Polycaprolactone Phase-Change Microcapsules via Single Nozzle Electro-Spraying: Characterization on Their Formation, Structures and Properties

Preparation and Performance of Dual‐functional Magnetic Phase‐change Microcapsules

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