SCG expert, Wiwat Pornwannachai, is discussing about the “New 2D functional materials capture CO2 in adhesives during curing” at FEICA 2019. He is presenting a new materials platform, CIERRA®, which is created via collaboration between Siam Cement Group and the University of Oxford can be used as a CO2 scavenger to eliminate undesired bubbles.
New CO2 Scavenger Functional Materials Platform
In moisture-cured polyurethane adhesives, carbon dioxide (CO
2) is generated during curing, which leads to bubble formation that lowers the mechanical properties of the cured adhesives. With tailored properties, CIERRA®, a novel functional materials platform created via collaboration between Siam Cement Group (SCG, Thailand) and the University of Oxford (United Kingdom), can be used as a CO
2 scavenger to eliminate undesired bubbles.
With a layered structure of double oxide chemistry, CIERRA® allows the adsorption of carbon dioxide to its layer structure under ambient conditions to yield its hydroxide form. With the capability to customize surface area, the product hence provides excellent adsorption performance in both adsorption rate and capacity when used in PU formulation.
CIERRA® for Improving Adhesive Properties
The test results show three times higher CO
2 adsorption using CIERRA® compared to an existing solution of carbon black. In formulations, bubbles are significantly reduced with the addition of CIERRA®, hence improving the final properties such as mechanical performance and electrical conductivity. From these promising results and collaboration with our customers, we suggest that CIERRA® may be considered as a new potential material platform answering needs in the adhesive market such as CO
2 capture.
The CIERRA® platform is based on modification technology to customize chemical composition, porosity, and the surface of the materials. This offers multiple benefits to applications in adhesives as an additive to enhance performance of adhesive formulations such as flame-retardant and barrier properties.
Source: FEICA 2019