Processing and Thermal Response of Temperature-Sensitive-Gel(TSG)/Polymer Composites

Area of Science:

• Materials Science
• Polymer Science
• Smart Materials

Background:

• Temperature-sensitive gels (TSGs) are utilized across diverse fields including medicine, robotics, and MEMS.
• Developing materials with tunable properties, such as controllable gas permeability, is crucial for advanced applications.

Purpose of the Study:

• To synthesize a novel TSG with enhanced thermal durability and a low melting point (<60 °C).
• To develop and characterize microporous breathable films using the synthesized TSG blended with LLDPE/CaCO₃ composite.
• To investigate the potential of these films for applications requiring controllable gas permeability based on temperature.

Main Methods:

• Synthesis of a novel temperature-sensitive gel (TSG) with a melting point below 60 °C.
• Preparation of microporous TSG/LLDPE/CaCO₃ composite films by blending TSG particles with LLDPE/CaCO₃.
• Characterization of film morphology (SEM), thermal properties, mechanical properties, and gas permeability.
• Demonstration of temperature control experiments to validate gas permeability modulation.

Main Results:

• The synthesized TSG exhibited good thermal durability and excellent thermal expansion.
• Microporous composite films (TSG/LLDPE/CaCO₃) displayed a uniform porous structure with pore sizes ranging from 5–40 μm.
• Gas permeability testing and temperature control experiments confirmed the TSG's ability to modulate gas permeability in response to temperature changes.

Conclusions:

• The developed TSG/LLDPE/CaCO₃ composite films demonstrate controllable gas permeability, making them suitable for strategic breathable film applications.
• The material shows significant practical value and promising application prospects for temperature-sensitive breathable technologies.
• This research highlights the potential of TSGs in creating advanced functional materials with tunable properties.