Progress in Application of Silane Coupling Agent for Clay Modification to Flame Retardant Polymer

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Polymer composites are essential in various industries.
• Developing environmentally friendly and flame-retardant clay/polymer composites is a key research area.
• Efficient surface modification of clay for flame retardant polymers presents challenges.

Purpose of the Study:

• To review the classification, modification mechanisms, and processes of silane coupling agent-treated clay.
• To outline the flame retardant mechanisms of these modified clay/polymer composites.
• To highlight the synergistic effects and recent advancements in the field.

Main Methods:

• Surface modification of clay using silane coupling agents.
• Grafting organic functional groups onto clay surfaces via hydrolysis and condensation reactions.
• Investigating the improved compatibility and dispersion of modified clay in polymer matrices.

Main Results:

• Silane coupling agent modification enhances the interfacial bonding between clay and polymer matrices.
• Improved dispersion and compatibility lead to enhanced flame retardant properties.
• Synergistic flame retardant effects are observed between clay and flame retardants.

Conclusions:

• Silane coupling agent-modified clays offer a promising route to high-performance flame retardant polymer composites.
• Current research predominantly focuses on montmorillonite, sepiolite, attapulgite, and kaolinite modified with specific silanes (KH-550, KH-560, KH-570).
• Future research trends involve exploring novel modifications and synergistic systems for advanced flame retardancy.