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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

MICROFLUIDIC FABRICATION OF HEPTADECANE MICROCAPSULES VIA A O\O\W THREE-PHASE EMULSION ROUTE

Jun Li
College of Power Engineering, Chongqing University, Shapingba, Chongqing, 400044, China

Ying Chen
Soft Matter Center, Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

Longjian Li
Chongqing University, Shapingba, Chongqing, 400044, China

Lisi Jia
Soft Matter Center, Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

Yiang Li
Soft Matter Center, Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

Wei Cui
Soft Matter Center, Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

Jiacheng Wang
Guangdong University of Technology, Panyu District, Guangzhou, 510006, China

DOI: 10.1615/IHTC16.mmp.022319
pages 5643-5651


SCHLÜSSELWÖRTER: New materials, Thermal storage, Phase change materials, Micro-encapsulation, Microfluidic device, Thermal energy storage

Abstrakt

Microencapsulated phase change materials (MEPCMs) which contains a PCM core and a polymer shell has attracted more and more attentions for its advantages in the thermal energy storage applications. As the structure of the MEPCMs has a great impact on the properties of the capsules, controlling the core and shell thicknesses of MEPCMs is important for the study of thermophysical properties of MEPCMs. This study focuses on preparing PCM microcapsules with heptadecane core and a UV-photocured acrylic shell from O/O/W double droplets. A coaxial flow microfludic device was used to produce the monodisperse heptadecanein-monomer droplets with predetermined core/shell volume ratios. The heptadecane, monomer and an aqueous polyvinyl alcohol solution were injected into the device from different inlet of the microfluidic device. By controlling the inlet velocities of the three phases, the core and shell thicknesses of the droplets could be controlled independently. The size of the core was controlled in the range of 100-500 µm, meanwhile the shell thickness was tuned in the range of 10-100 µm. Subsequent, the double droplets were collected and formed capsules with controlled core and shell thicknesses by UV light exposure.

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