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https://hku.zoom.us/j/99006713227?pwd=ZxGDa5igZwabemKap4hHS1DCQrdOWa.1

Meeting ID: 990 0671 3227

Password: 627836

Abstract:

As the world grapples with global warming and the shift to clean energy technologies, improving energy efficiency across various sectors has become crucial. Thermal insulation materials with low thermal conductivity and robust mechanical properties, and can be implemented on a large scale, are especially important for reducing energy consumption and greenhouse gas emissions across different industries. This study explores a method to create porous insulation materials at room temperature using abundant and recyclable kaolin-based minerals as resources. By modifying the clay particles’ surfaces with specific molecules, we developed stable foams that retain their structure during ambient dehydration. The sintered materials have a 97% porosity and low thermal conductivity (0.035 W/mK), along with excellent fire resistance. Raising the sintering temperature to 1000°C further improves their mechanical strength, achieving a compressive strength of 1.64 MPa, which is better than traditional porous materials with similar porosity. This eco-friendly approach offers a new solution for producing low-cost thermal insulation materials from sustainable resources.

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