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Related Experiment Video

Updated: May 30, 2025

Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices
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Polysiloxane-Modified PMMA-Shell Phase Change Microcapsules for Thermal Management Fabrics.

Yang Chen1, Xinbo Lu2, Ziqiang Liu1,3

  • 1College of Chemical and Biological Engineering, Zhejiang University, Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Hangzhou, 310027, China.

Macromolecular Rapid Communications
|January 28, 2025
PubMed
Summary

Organosilicon crosslinkers enhance microencapsulated phase change materials (mPCMs) for thermal management. Optimal crosslinking improves performance, enabling significant temperature reduction in epoxy resins and textiles.

Keywords:
PMMAenergy storage materialmicrocapsule phase change materialsorganosilicon

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Thermal Engineering

Background:

  • Phase change materials (PCMs) face challenges like leakage and degradation in thermal management applications.
  • Microencapsulation of PCMs using crosslinked polymers, such as polysiloxanes, offers a promising solution.
  • Poly (methyl methacrylate) (PMMA) is explored for microencapsulating paraffin wax.

Purpose of the Study:

  • To prepare and utilize organosilicon crosslinkers for PMMA-based microencapsulation of paraffin wax.
  • To investigate the effect of crosslinking degree on the performance of microcapsule phase change materials (mPCMs).
  • To evaluate the application of these mPCMs in composite materials for thermal management.

Main Methods:

  • Synthesis of organosilicon crosslinkers.
  • Microencapsulation of paraffin wax using PMMA and organosilicon crosslinkers.
  • Characterization of mPCMs, including encapsulation efficiency and thermal properties (melting/crystallization enthalpy).
  • Fabrication and testing of mPCM-enhanced epoxy resins and textiles.

Main Results:

  • Increasing crosslinking degree initially improves mPCM performance by smoothing the shell surface.
  • Excessive crosslinking leads to flocculation and reduced performance.
  • mPCMs with 10% wt crosslinking agent achieved high encapsulation efficiency (81.3%) and enthalpy values (285.0 J/g melting, 253.1 J/g crystallization).
  • Polysiloxane-modified mPCMs reduced epoxy resin temperature by up to 25 °C.
  • Textiles with adjusted mPCMs achieved a 17 °C temperature reduction while maintaining air permeability.

Conclusions:

  • Organosilicon crosslinking is effective in improving the performance of PMMA-based mPCMs.
  • An optimal crosslinking degree is crucial for maximizing mPCM efficiency.
  • These mPCMs show significant potential for thermal management in epoxy resins and textiles.