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Supported Ionic Liquid Silica as Curing Agent for Epoxy Composites with Improved Mechanical and Thermal Properties
Chongrui Zhang1, Xiaoqian Mi2, Junyu Tian3
1Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China. 201421133047@mail.scuec.edu.cn.
Polymers
|April 11, 2019
Summary
Supported ionic liquid silica (IL-silica) enhances epoxy composite properties by acting as both a reinforcing agent and a curing agent. This novel approach improves mechanical strength, toughness, and thermal stability without traditional curing agents.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Epoxy composites are widely used but often require specific curing agents.
- Improving interfacial interactions in composites is key to enhancing mechanical properties.
Purpose of the Study:
- To enhance the mechanical and thermal properties of epoxy composites.
- To investigate the dual role of supported ionic liquid silica (IL-silica) as a reinforcing filler and a curing agent.
Main Methods:
- Incorporation of IL-silica into epoxy matrices.
- Differential scanning calorimetry (DSC) for cure analysis.
- Dynamic mechanical analysis (DMA) for mechanical property evaluation.
- Tensile testing for strength and toughness assessment.
Main Results:
- IL-silica successfully cured epoxy composites without conventional agents.
- IL-silica/epoxy composites exhibited superior mechanical properties (tensile strength, toughness) compared to those with un-functionalized silica (u-silica).
- Enhanced storage modulus and glass transition temperature (Tg) were observed with IL-silica addition.
- Improved thermal stability was achieved in IL-silica modified composites.
Conclusions:
- IL-silica acts as an effective reinforcing filler and an in-situ curing agent for epoxy composites.
- Enhanced properties are attributed to improved IL-silica dispersion and strong covalent interfacial bonding.
- This study presents a promising method for developing high-performance epoxy composites.
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