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Related Concept Videos

Solid–Solid Solutions01:24

Solid–Solid Solutions

132
The temperature-composition phase diagram of two solids, A and B, which are immiscible in the solid phase but form miscible liquids, shows that when the temperature is low, these two exist as separate, pure solids (A and B). As the temperature increases, they transition into a single-phase liquid solution where A and B coexist. Moving from point a1 to a2 in the phase diagram, the composition changes such that solid B begins to separate from the solution, enriching the remaining liquid with A.
132

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Related Experiment Video

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Mechanically Robust and Environmentally Stable Solid-Solid Phase Change Materials via Thiolactone Strategy for

Haonan Li1, Chunmei Li1, Haoran Zhang1

  • 1Xi'an Key Laboratory of Functional Organic Porous Materials, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|May 15, 2025
PubMed
Summary
This summary is machine-generated.

Novel solid-solid phase change materials (SSPCMs) offer robust thermal management and shape stability. Utilizing thiolactone chemistry, these advanced materials exhibit excellent environmental resistance and tunable properties for diverse applications.

Keywords:
environmental robustnesssolid–solid phase change materialsthiolactoneversatile applications

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Thermal Engineering

Background:

  • Solid-solid phase change materials (SSPCMs) are crucial for thermal management and shape stability.
  • Existing SSPCMs often use ester groups, limiting their performance in humid or extreme environments.
  • A need exists for SSPCMs with enhanced environmental robustness and tunable thermal properties.

Purpose of the Study:

  • To develop novel SSPCMs with superior latent heat and environmental robustness.
  • To explore the use of thiolactone ring-opening reactions for SSPCM synthesis.
  • To investigate the potential of these SSPCMs for advanced applications like information encryption and solar-thermal energy storage.

Main Methods:

  • Synthesis of thiolactone copolymers with abundant reactive sites.
  • Functionalization of copolymers with alkyl amines and acrylates as phase change components.
  • Crosslinking of functionalized copolymers using polyetheramine to form a robust network.

Main Results:

  • The resulting SSPCMs demonstrated tunable phase transition temperatures (44.7-61.0 °C) and enthalpies (20.3-98.9 J g⁻¹).
  • SSPCMs maintained excellent stability in mechanical properties, phase change behavior, and shape under water, acid, and alkaline conditions for 2 hours.
  • Synthesized films exhibited reversible information encryption, shape memory, and infrared stealth properties.
  • Integration with polydopamine nanoparticles enhanced solar-thermal storage and release capacity.

Conclusions:

  • Thiolactone ring-opening reactions provide a viable route to environmentally robust SSPCMs.
  • The developed SSPCMs offer tunable thermal properties and multi-functional capabilities.
  • These materials represent a significant advancement for next-generation smart thermal management solutions.