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Microencapsulation through thermally sintering Pickering emulsion-based colloidosomes.

Dezhong Yin1, Licong Bai, Yu Jia

  • 1School of Science, Northwestern Polytechnical University, Xi'an 710072, China. dezh_yin@nwpu.edu.cn.

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Summary
This summary is machine-generated.

Thermally sintered Pickering emulsion microcapsules offer enhanced durability for phase change materials (PCMs). This process significantly reduces leakage, improving thermal energy storage applications.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Colloid Science

Background:

  • Phase change materials (PCMs) are crucial for thermal energy storage.
  • Developing robust microcapsules for PCMs is essential for their practical application.
  • Pickering emulsions offer a versatile platform for microcapsule fabrication.

Purpose of the Study:

  • To synthesize and characterize microcapsules containing a phase change material (PCM) using thermally sintered Pickering emulsion-based colloidosomes.
  • To evaluate the durability and leakage of the microcapsules before and after thermal sintering.

Main Methods:

  • Preparation of monodisperse poly(glycidyl methacrylate) (PGMA) microspheres via dispersive polymerization.
  • Fabrication of microcapsules with a PCM core and PGMA-armored polystyrene shell through Pickering emulsion polymerization.
  • Thermal sintering to create an integral shell structure for the microcapsules.
  • Durability assessment using suspension tests (water, ethanol) and accelerated thermal cycling.

Main Results:

  • Microcapsules were successfully fabricated with a PCM core and a PGMA-armored polystyrene shell.
  • Thermal sintering significantly improved microcapsule integrity.
  • Leakage of dodecanol was reduced from 19.6% to 10.3% in ethanol suspension tests after sintering.
  • Leakage was further reduced from 10.4% to 2.8% in accelerated thermal cycling tests post-sintering.

Conclusions:

  • Thermal sintering is an effective method to enhance the tightness and durability of Pickering emulsion-based microcapsules.
  • The developed microcapsules show improved performance for phase change material encapsulation.
  • This approach offers a promising route for developing robust microencapsulated PCMs for thermal energy storage.