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Recyclable low-temperature phase change microcapsules for cold storage.

Jiaojiao Zhao1, Jinling Long1, Yongqiang Du1

  • 1School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China.

Journal of Colloid and Interface Science
|January 10, 2020
PubMed
Summary
This summary is machine-generated.

Recyclable low-temperature phase change microcapsules (LTPCMs) were synthesized for cold chain transport. The n-tetradecane-based LTPCMs demonstrated excellent recyclability and superior cold-storing performance, making them ideal for reliable cold storage applications.

Keywords:
Cold chain transportationCold storageIn-situ suspension copolymerizationLow-temperature phase change microcapsuleRecyclability

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Sustainable Technology

Background:

  • Short-distance cold chain transportation requires reliable and reusable cold storage solutions.
  • Low-temperature phase change materials (LTPCMs) offer potential for temperature regulation but often lack sufficient recyclability.
  • Developing microencapsulated LTPCMs with enhanced stability and performance is crucial for practical applications.

Purpose of the Study:

  • To synthesize recyclable low-temperature phase change microcapsules (LTPCMs) for cold storage applications.
  • To investigate the phase change properties and cold-discharging performance of microcapsules containing n-dodecane, n-tridecane, and n-tetradecane.
  • To evaluate the recyclability and comprehensive cold-storing performance of the developed LTPCMs.

Main Methods:

  • In-situ suspension copolymerization of styrene and methyl methacrylate to create non-crosslinking copolymer shells.
  • Encapsulation of n-dodecane, n-tridecane, and n-tetradecane within the microcapsules.
  • Characterization of phase change enthalpy, cold-discharging temperature, and cold-discharging period.
  • Assessment of recyclability through multiple cold-discharging cycles.

Main Results:

  • Successfully synthesized n-dodecane-LTPCMs, n-tridecane-LTPCMs, and n-tetradecane-LTPCMs with high phase change enthalpies.
  • Achieved cold-discharging periods of 30 min, 40 min, and 120 min, respectively.
  • Demonstrated excellent recyclability with unchanged cold-discharging periods over multiple cycles.
  • Identified n-tetradecane-LTPCM-65 as exhibiting superior performance with a narrow temperature range (3-4 °C) and long discharge period (69-120 min).

Conclusions:

  • Recyclable LTPCMs were successfully developed for cold storage in short-distance cold chain transportation.
  • The non-crosslinking copolymer shells ensure reliable reusability and stable cold-discharging performance.
  • The n-tetradecane-based LTPCMs show significant promise for advanced cold storage solutions due to their exceptional comprehensive performance.